Comparison of TLS implementations

The Transport Layer Security (TLS) protocol provides the ability to secure communications across networks. This comparison of TLS implementations compares several of the most notable libraries. There are several TLS implementations which are free software and open source.

All comparison categories use the stable version of each implementation listed in the overview section. The comparison is limited to features that directly relate to the TLS protocol.

Overview

Implementation	Developed by	Open source	Software license	Copyright holder	Written in	Latest stable version, release date	Origin
Botan	Jack Lloyd	Yes	Simplified BSD License	Jack Lloyd	C++	2.16.0 (October 6, 2020[1]) [±]	US (Vermont)
BoringSSL	Google	Yes	OpenSSL-SSLeay dual-license, ISC license	Eric Young, Tim Hudson, Sun, OpenSSL project, Google, and others	C, C++, Go, assembly	??	Australia/EU
Bouncy Castle	The Legion of the Bouncy Castle Inc.	Yes	MIT License	Legion of the Bouncy Castle Inc.	Java, C#	Java 1.68 / December 21, 2020[2] Java FIPS BC-FJA 1.0.2 / August 24, 2019[3] C# 1.8.9 / December 9, 2020[4] C# FIPS BC-FNA 1.0.1 / December 28, 2016[5]	Australia
BSAFE	Dell, formerly RSA Security	No	Proprietary	Dell	Java, C, assembly	SSL-J 6.2.7 (June 28, 2020) [±] Micro Edition Suite 4.6 (December 17, 2020[6]) [±]	Australia
cryptlib	Peter Gutmann	Yes	Sleepycat License and commercial license	Peter Gutmann	C	3.4.5 (2019[7]) [±]	NZ
GnuTLS	GnuTLS project	Yes	GNU LGPLv2.1+	Free Software Foundation	C	3.6.14 (June 3, 2020[8]) [±]	EU (Greece and Sweden)
Java Secure Socket Extension (JSSE)	Oracle	Yes	GNU GPLv2 and commercial license	Oracle	Java	15.0.2 (December 10, 2020[9]) [±] 11.0.10 (January 19, 2021[10]) [±] 8u282 (December 29, 2020[11]) [±]	US
LibreSSL	OpenBSD Project	Yes	Apache License 1.0, 4-clause BSD License, ISC License, and some are public domain	Eric Young, Tim Hudson, Sun, OpenSSL project, OpenBSD Project, and others	C, assembly	3.2.3 (8 December 2020[12][13]) [±]	Canada
MatrixSSL[14]	PeerSec Networks	Yes	GNU GPLv2+ and commercial license	PeerSec Networks	C	4.2.2 (September 11, 2019 [15]) [±]	US
Mbed TLS (previously PolarSSL)	Arm	Yes	Apache License 2.0, GNU GPLv2+ and commercial license	Arm Holdings	C	2.25.0 (December 11, 2020[16]) [±]	EU (Netherlands)
Network Security Services (NSS)	Mozilla, AOL, Red Hat, Sun, Oracle, Google and others	Yes	MPL 2.0	NSS contributors	C, assembly	Standard 3.61 / January 22, 2021[17] Extended Support Release 3.53.1 / June 16, 2020[17]	US
OpenSSL	OpenSSL project	Yes	OpenSSL-SSLeay dual-license	Eric Young, Tim Hudson, Sun, OpenSSL project, and others	C, assembly	1.1.1i (December 8, 2020[18]) [±]	Australia/EU
S2n	Amazon	Yes	Apache License 2.0, GNU GPLv2+ and commercial license	Amazon, Inc.	C	Continuous	US
SChannel	Microsoft	No	Proprietary	Microsoft Inc.		Windows 10, 2015-07-29	US
Secure Transport	Apple Inc.	Yes	APSL 2.0	Apple Inc.		57337.20.44 (OS X 10.11.2), 2015-12-08	US
wolfSSL (previously CyaSSL)	wolfSSL[19]	Yes	GNU GPLv2+ and commercial license	wolfSSL Inc.[20]	C	4.6.0 (December 22, 2020[21]) [±]	US
Erlang/OTP SSL application	Ericsson	Yes	Apache License 2.0	Ericsson	Erlang	OTP-21, 2018-06-19	Sweden
Implementation	Developed by	Open source	Software license	Copyright owner	Written in	Latest stable version, release date	Origin

Protocol support

Several versions of the TLS protocol exist. SSL 2.0 is a deprecated[22] protocol version with significant weaknesses. SSL 3.0 (1996) and TLS 1.0 (1999) are successors with two weaknesses in CBC-padding that were explained in 2001 by Serge Vaudenay.[23] TLS 1.1 (2006) fixed only one of the problems, by switching to random initialization vectors (IV) for CBC block ciphers, whereas the more problematic use of mac-pad-encrypt instead of the secure pad-mac-encrypt was addressed with RFC 7366.[24] A workaround for SSL 3.0 and TLS 1.0, roughly equivalent to random IVs from TLS 1.1, was widely adopted by many implementations in late 2011,[25] so from a security perspective, all existing version of TLS 1.0, 1.1 and 1.2 provide equivalent strength in the base protocol and are suitable for 128-bit security according to NIST SP800-57 up to at least 2030. In 2014, the POODLE vulnerability of SSL 3.0 was discovered, which takes advantage the known vulnerabilities in CBC, and an insecure fallback negotiation used in browsers.[26]

TLS 1.2 (2008) introduced a means to identify the hash used for digital signatures. While permitting the use of stronger hash functions for digital signatures in the future (rsa,sha256/sha384/sha512) over the SSL 3.0 conservative choice (rsa,sha1+md5), the TLS 1.2 protocol change inadvertently and substantially weakened the default digital signatures and provides (rsa,sha1) and even (rsa,md5).[27]

Datagram Transport Layer Security (DTLS or Datagram TLS) 1.0 is a modification of TLS 1.1 for a packet-oriented transport layer, where packet loss and packet reordering have to be tolerated. The revision DTLS 1.2 based on TLS 1.2 was published in January 2012.[28]

Note that there are known vulnerabilities in SSL 2.0 and SSL 3.0. With the exception of the predictable IVs (for which an easy workaround exists) all currently known vulnerabilities affect all version of TLS 1.0/1.1/1.2 alike.[29]

Implementation	SSL 2.0 (insecure)[30]	SSL 3.0 (insecure)[31]	TLS 1.0[32]	TLS 1.1[33]	TLS 1.2[34]	TLS 1.3	DTLS 1.0[35]	DTLS 1.2[28]
Botan	No	No[36]	Yes	Yes	Yes		Yes	Yes
BoringSSL			Yes	Yes	Yes	Yes	Yes	Yes
Bouncy Castle	No	No	Yes	Yes	Yes	Yes (draft version)	Yes	Yes
BSAFE[37]	No	Disabled by default	Yes	Yes	Yes	No	No	No
cryptlib	No	Disabled by default at compile time	Yes	Yes	Yes		No	No
GnuTLS	No^[a]	Disabled by default[38]	Yes	Yes	Yes	Yes[39]	Yes	Yes
JSSE	No^[a]	Disabled by default[40]	Yes	Yes	Yes	Yes (JDK 11+)[41]	Yes	Yes
LibreSSL	No[42]	No[43]	Yes	Yes	Yes	Yes	Yes	No
MatrixSSL	No	Disabled by default at compile time[44]	Yes	Yes	Yes	Yes	Yes	Yes
Mbed TLS	No	Disabled by default[45]	Yes	Yes	Yes	No	Yes[45]	Yes[45]
NSS	No^[b]	Disabled by default[46]	Yes	Yes[47]	Yes[48]	Yes[49]	Yes[47]	Yes[50]
OpenSSL	No[51]	Disabled by default	Yes	Yes[52]	Yes[52]	Yes	Yes	Yes[53]
S2n[54]	No	Disabled by default	Yes	Yes	Yes		No	No
SChannel XP, 2003[55]	Disabled by default in MSIE 7	Enabled by default	Enabled by default in MSIE 7	No	No		No	No
SChannel Vista[56]	Disabled by default	Enabled by default	Yes	No	No		No	No
SChannel 2008[56]	Disabled by default	Enabled by default	Yes	Disabled by default (KB4019276)	Disabled by default (KB4019276)		No	No
SChannel 7, 2008R2[57]	Disabled by default	Disabled by default in MSIE 11	Yes	Enabled by default in MSIE 11	Enabled by default in MSIE 11		Yes[58]	No[58]
SChannel 8, 2012[57]	Disabled by default	Enabled by default	Yes	Disabled by default	Disabled by default		Yes	No
SChannel 8.1, 2012R2, 10 v1507 & v1511[57]	Disabled by default	Disabled by default in MSIE 11	Yes	Yes	Yes		Yes	No
SChannel 10 v1607 / 2016[59]	No	Disabled by default	Yes	Yes	Yes		Yes	Yes
Secure Transport OS X 10.2-10.7, iOS 1-4	Yes	Yes	Yes	No	No		No	No
Secure Transport OS X 10.8-10.10, iOS 5-8	No^[c]	Yes	Yes	Yes^[c]	Yes^[c]		Yes^[c]	No
Secure Transport OS X 10.11, iOS 9	No	No^[c]	Yes	Yes	Yes		Yes	Un­known
Secure Transport OS X 10.13, iOS 11	No	No^[c]	Yes	Yes	Yes	Yes (draft version)[60]	Yes	Un­known
wolfSSL	No	Disabled by default[61]	Yes	Yes	Yes	Yes	Yes	Yes
Erlang/OTP SSL application	No	Disabled by default	Yes	Yes	Yes	Not yet	Yes	Yes
Implementation	SSL 2.0 (insecure)[30]	SSL 3.0 (insecure)[31]	TLS 1.0[32]	TLS 1.1[33]	TLS 1.2[34]	TLS 1.3	DTLS 1.0[35]	DTLS 1.2[28]

1. ^
   SSL 2.0 client hello is supported even though SSL 2.0 is not supported or is disabled because of the backward compatibilities.
2. ^
   Server-side implementation of the SSL/TLS protocol still supports processing of received v2-compatible client hello messages.[62]
3. ^
   Secure Transport: SSL 2.0 was discontinued in OS X 10.8. SSL 3.0 was discontinued in OS X 10.11 and iOS 9.TLS 1.1, 1.2 and DTLS are available on iOS 5.0 and later, and OS X 10.9 and later.[63]
[64]

NSA Suite B Cryptography

Required components for NSA Suite B Cryptography (RFC 6460) are:

• Advanced Encryption Standard (AES) with key sizes of 128 and 256 bits. For traffic flow, AES should be used with either the Counter Mode (CTR) for low bandwidth traffic or the Galois/Counter Mode (GCM) mode of operation for high bandwidth traffic (see Block cipher modes of operation) — symmetric encryption
• Elliptic Curve Digital Signature Algorithm (ECDSA) — digital signatures
• Elliptic Curve Diffie–Hellman (ECDH) — key agreement
• Secure Hash Algorithm 2 (SHA-256 and SHA-384) — message digest

Per CNSSP-15, the 256-bit elliptic curve (specified in FIPS 186-2), SHA-256, and AES with 128-bit keys are sufficient for protecting classified information up to the Secret level, while the 384-bit elliptic curve (specified in FIPS 186-2), SHA-384, and AES with 256-bit keys are necessary for the protection of Top Secret information.

Implementation	TLS 1.2 Suite B
Botan	Yes
Bouncy Castle	Yes
BSAFE	Yes[37]
cryptlib	Yes
GnuTLS	Yes
JSSE	Yes[65]
LibreSSL	Yes
MatrixSSL	Yes
Mbed TLS	Yes
NSS	No[66]
OpenSSL	Yes[53]
S2n
SChannel	Yes[67]
Secure Transport	No
wolfSSL	Yes
Implementation	TLS 1.2 Suite B

Certifications

Note that certain certifications have received serious negative criticism from people who are actually involved in them.[68]

Implementation	FIPS 140-1, FIPS 140-2[69]		Common Criteria	Embedded FIPS Solution
	Level 1	Level 2
Botan[70]
Bouncy Castle	BC-FJA 1.0.0 (#2768) BC-FJA 1.0.1 (#3152)
BSAFE Micro-Edition Suite[71]	Crypto-C ME 3.0.0.1 (#1092) Crypto-C ME 4.0.1 / 4.0.2.5 (#2047, #2056, #2097, #2217) Crypto-C ME 4.1 / 4.1.0.1 / 4.1.2 / 4.1.3.2 (#2294, #2300) Crypto-C ME 4.1.4 (#3743)
BSAFE SSL-J[72]	Crypto-J 6.0 (#1785, #1786) Crypto-J 6.1 / 6.1.1.0.1 (#2057, #2058) Crypto-J 6.2 / 6.2.1.1 (#2468, #2469) Crypto-J 6.2.4 (#3172, #3184)
cryptlib[73]
GnuTLS[74]	Red Hat Enterprise Linux GnuTLS Cryptographic Module (#2780)
JSSE
LibreSSL[42]	no support
MatrixSSL[75]	SafeZone FIPS Cryptographic Module: 1.1 (#2389)
Mbed TLS[76]
NSS[77]	Network Security Services: 3.2.2 (#247) Network Security Services Cryptographic Module: 3.11.4 (#815), 3.12.4 (#1278), 3.12.9.1 (#1837)	Netscape Security Module: 1 (#7[notes 1]), 1.01 (#47[notes 2]) Network Security Services: 3.2.2 (#248[notes 3]) Network Security Services Cryptographic Module: 3.11.4 (#814[notes 4]), 3.12.4 (#1279, #1280[notes 5])
OpenSSL[78]	OpenSSL FIPS Object Module: 1.0 (#624), 1.1.1 (#733), 1.1.2 (#918), 1.2, 1.2.1, 1.2.2, 1.2.3 or 1.2.4 (#1051) 2.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7 or 2.0.8 (#1747)
SChannel[79]	Cryptographic modules in Windows NT 4.0, 95, 95, 2000, XP, Server 2003, CE 5, CE 6, Mobile 6.x, Vista, Server 2008, 7, Server 2008 R2, 8, Server 2012, RT, Surface, Phone 8 See details on Microsoft FIPS 140 Validated Cryptographic Modules
Secure Transport	Apple FIPS Cryptographic Module: 1.0 (OS X 10.6, #1514), 1.1 (OS X 10.7, #1701) Apple OS X CoreCrypto Module; CoreCrypto Kernel Module: 3.0 (OS X 10.8, #1964, #1956), 4.0 (OS X 10.9, #2015, #2016) Apple iOS CoreCrypto Module; CoreCrypto Kernel Module: 3.0 (iOS 6, #1963, #1944), 4.0 (iOS 7 , #2020, #2021)
wolfSSL[80]	wolfCrypt FIPS Module: 4.0 (#3389) See details on NIST certificate for validated Operating Environments wolfCrypt FIPS Module: 3.6.0 (#2425) See details on NIST certificate for validated Operating Environments			Yes
Implementation	Level 1	Level 2	Common Criteria	Embedded FIPS Solution
	FIPS 140-1, FIPS 140-2

1. with Sun Sparc 5 w/ Sun Solaris v 2.4SE (ITSEC-rated)
2. with Sun Ultra-5 w/ Sun Trusted Solaris version 2.5.1 (ITSEC-rated)
3. with Solaris v8.0 with AdminSuite 3.0.1 as specified in UK IT SEC CC Report No. P148 EAL4 on a SUN SPARC Ultra-1
4. with these platforms; Red Hat Enterprise Linux Version 4 Update 1 AS on IBM xSeries 336 with Intel Xeon CPU, Trusted Solaris 8 4/01 on Sun Blade 2500 Workstation with UltraSPARC IIIi CPU
5. with these platforms; Red Hat Enterprise Linux v5 running on an IBM System x3550, Red Hat Enterprise Linux v5 running on an HP ProLiant DL145, Sun Solaris 10 5/08 running on a Sun SunBlade 2000 workstation, Sun Solaris 10 5/08 running on a Sun W2100z workstation

Key exchange algorithms (certificate-only)

This section lists the certificate verification functionality available in the various implementations.

Implementation	RSA[34]	RSA-EXPORT (insecure)[34]	DHE-RSA (forward secrecy)[34]	DHE-DSS (forward secrecy)[34]	ECDH-ECDSA[81]	ECDHE-ECDSA (forward secrecy)[81]	ECDH-RSA[81]	ECDHE-RSA (forward secrecy)[81]	GOST R 34.10-94, 34.10-2001[82]
Botan	Disabled by default	No	Yes	Disabled by default	No	Yes	No	Yes	No
BSAFE	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No
cryptlib	Yes	No	Yes	Yes	No	Yes	No	No	No
GnuTLS	Yes	No	Yes	Disabled by default[38]	No	Yes	No	Yes	No
JSSE	Yes	Disabled by default	Yes	Yes	Yes	Yes	Yes	Yes	No[83]
LibreSSL	Yes	No[42]	Yes	Yes	Yes	Yes	Yes	Yes	Yes[84]
MatrixSSL	Yes	No	Yes	No	Yes	Yes	Yes	Yes	No
Mbed TLS	Yes	No	Yes	No	Yes	Yes	Yes	Yes	No
NSS	Yes	Disabled by default	Yes[85]	Yes	Yes	Yes	Yes	Yes	No[86][87]
OpenSSL	Yes	No[51]	Yes	Disabled by default[51]	Yes	Yes	Yes	Yes	Yes[88]
SChannel XP/2003	Yes	Yes	No	XP: Max 1024 bits 2003: 1024 bits only	No	No	No	No	No[89]
SChannel Vista/2008	Yes	Disabled by default	No	1024 bits by default[90]	No	Yes	No	except AES_GCM	No[89]
SChannel 8/2012	Yes	Disabled by default	AES_GCM only[91][92][93]	1024 bits by default[90]	No	Yes	No	except AES_GCM	No[89]
SChannel 7/2008R2, 8.1/2012R2	Yes	Disabled by default	Yes	2048 bits by default[90]	No	Yes	No	except AES_GCM	No[89]
SChannel 10	Yes	Disabled by default	Yes	2048 bits by default[90]	No	Yes	No	Yes	No[89]
Secure Transport OS X 10.6	Yes	Yes	except AES_GCM	Yes	Yes	except AES_GCM	yes	except AES_GCM	No
Secure Transport OS X 10.8-10.10	Yes	No	except AES_GCM	No	Yes	except AES_GCM	Yes	except AES_GCM	No
Secure Transport OS X 10.11	Yes	No	Yes	No	No	Yes	No	Yes	No
wolfSSL	Yes	No	Yes	No	Yes	Yes	Yes	Yes	No
Erlang/OTP SSL application	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No
Implementation	RSA[34]	RSA-EXPORT (insecure)[34]	DHE-RSA (forward secrecy)[34]	DHE-DSS (forward secrecy)[34]	ECDH-ECDSA[81]	ECDHE-ECDSA (forward secrecy)[81]	ECDH-RSA[81]	ECDHE-RSA (forward secrecy)[81]	GOST R 34.10-94, 34.10-2001[82]

Key exchange algorithms (alternative key-exchanges)

Implementation	SRP[94]	SRP-DSS[94]	SRP-RSA[94]	PSK-RSA[95]	PSK[95]	DHE-PSK (forward secrecy)[95]	ECDHE-PSK (forward secrecy)[96]	KRB5[97]	DH-ANON[34] (insecure)	ECDH-ANON[81] (insecure)
Botan	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Disabled by default	Disabled by default
BSAFE Micro Edition Suite	No	No	No	No	No	No	No	No	Disabled by default	Disabled by default
BSAFE SSL-J	No	No	No	No	Yes[98]	No	No	No	Disabled by default	Disabled by default
cryptlib	No	No	No	No	Yes	Yes	No	Un­known	No	No
GnuTLS	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Disabled by default	Disabled by default
JSSE	No	No	No	No	No	No	No	Un­known	Disabled by default in Java 8	Disabled by default in Java 8
LibreSSL	No[99]	No[99]	No[99]	No	No	No	No	No	Yes	Yes
MatrixSSL	No	No	No	Yes	Yes	Yes	No	No	Disabled by default	No
Mbed TLS	No	No	No	Yes	Yes	Yes	Yes	No	No	No
NSS	No[100]	No[100]	No[100]	No[101]	No[101]	No[101]	No[101]	No	Client side only, disabled by default[102]	Disabled by default[103]
OpenSSL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes[104]	Disabled by default[105]	Disabled by default[105]
SChannel	No	No	No	No	No	No	No	Yes	No	No
Secure Transport	No	No	No	No	No	No	No	Un­known	Yes	Yes
wolfSSL	No	No	No	No	Yes	No	Yes[106]	No	No	No
Erlang/OTP SSL application	Disabled by default	Disabled by default	Disabled by default	Disabled by default	Disabled by default	Disabled by default	No	No	Disabled by default	Disabled by default
Implementation	SRP[94]	SRP-DSS[94]	SRP-RSA[94]	PSK-RSA[95]	PSK[95]	DHE-PSK (forward secrecy)[95]	ECDHE-PSK (forward secrecy)[96]	KRB5[97]	DH-ANON[34] (insecure)	ECDH-ANON[81] (insecure)

Certificate verification methods

Implementation	Application-defined	PKIX path validation[107]	CRL[108]	OCSP[109]	DANE (DNSSEC)[110]	Trust on First Use (TOFU)	CT[111]
Botan	Yes	Yes	Yes	Yes	No	No	Un­known
Bouncy Castle	Yes	Yes	Yes	Yes	Yes	No	Un­known
BSAFE	Yes	Yes	Yes	Yes	No	No	Un­known
cryptlib	Yes	Yes	Yes	Yes	No	No	Un­known
GnuTLS	Yes	Yes	Yes	Yes	Yes	Yes	Un­known
JSSE	Yes	Yes	Yes	Yes	No	No	Un­known
LibreSSL	Yes	Yes	Yes	Yes	No	No	Un­known
MatrixSSL	Yes	Yes	Yes	Yes[112]	No	No	Un­known
Mbed TLS	Yes	Yes	Yes	No[113]	No	No	Un­known
NSS	Yes	Yes	Yes	Yes	No[114]	No	Un­known
OpenSSL	Yes	Yes	Yes	Yes	Yes	No	Yes
SChannel	Un­known	Yes	Yes[115]	Yes[115]	No	No	Un­known
Secure Transport	Yes	Yes	Yes	Yes	No	No	Un­known
wolfSSL	Yes	Yes	Yes	Yes	No	No	Un­known
Erlang/OTP SSL application	Yes	Yes	Yes	No	No	No	Un­known
Implementation	Application-defined	PKIX path validation	CRL	OCSP	DANE (DNSSEC)	Trust on First Use (TOFU)	CT

Encryption algorithms

Implementation	Block cipher with mode of operation										Stream cipher	None
	AES GCM [116]	AES CCM [117]	AES CBC	Camellia GCM [118]	Camellia CBC [119]	ARIA GCM [120]	ARIA CBC [120]	SEED CBC [121]	3DES EDE CBC (insecure)[122]	GOST 28147-89 CNT (proposed) [82][n 1]	ChaCha20-Poly1305 [123]	Null (insecure) [n 2]
Botan	Yes	Yes	Yes	Yes	Yes	No	No	Disabled by default	Disabled by default	No	Yes[124]	Not implemented
BoringSSL	Yes	No	Yes	No	No	No	No	No	Yes	No	Yes
BSAFE Micro-Edition Suite	Yes	Yes	Yes	No	No	No	Yes	Yes	Lowest priority	No	No	Disabled by default
BSAFE SSL-J	Yes	Yes	Yes	No	No	No	No	No	Disabled by default	No	No	Disabled by default
cryptlib	Yes	No	Yes	No	No	No	No	No	Yes	No	No	Not implemented
GnuTLS	Yes	Yes[38]	Yes	Yes	Yes	No	No	No	Disabled by default[125]	No	Yes[126]	Disabled by default
JSSE	Yes	No	Yes	No	No	No	No	No	Disabled by default[127]	No[83]	Yes (JDK 12+)[128]	Disabled by default
LibreSSL	Yes[42]	No	Yes	No	Yes[84]	No	No	No[42]	Yes	Yes[84]	Yes[42]	Disabled by default
MatrixSSL	Yes	No	Yes	No	No	No	No	Yes	Disabled by default	No	Yes[129]	Disabled by default
Mbed TLS	Yes	Yes [130]	Yes	Yes	Yes	Yes[131]	Yes[131]	No	Yes	No	Yes[132]	Disabled by default at compile time
NSS	Yes[133]	No	Yes	No[134][n 3]	Yes[135]	No	No	Yes[136]	Yes	No[86][87]	Yes[137]	Disabled by default
OpenSSL	Yes[138]	Disabled by default[51]	Yes	No	Disabled by default[51]	Disabled by default[139]	No	Disabled by default[51]	Disabled by default[51]	Yes[88]	Yes[51]	Disabled by default
SChannel XP/2003	No	No	2003 only[140]	No	No	No	No	No	Yes	No[89]	No	Disabled by default
SChannel Vista/2008, 2008R2, 2012	No	No	Yes	No	No	No	No	No	Yes	No[89]	No	Disabled by default
SChannel 7, 8, 8.1/2012R2	Yes except ECDHE_RSA [91][92]	No	Yes	No	No	No	No	No	Yes	No[89]	No	Disabled by default
Schannel 10[141]	Yes	No	Yes	No	No	No	No	No	Yes	No[89]	No	Disabled by default
Secure Transport OS X 10.6 - 10.10	No	No	Yes	No	No	No	No	No	Yes	No	No	Disabled by default
Secure Transport OS X 10.11	Yes	No	Yes	No	No	No	No	No	Yes	No	No	Disabled by default
wolfSSL	Yes	Yes	Yes	No	Yes	No	No	No	Yes	No	Yes	Disabled by default
Erlang/OTP SSL application	Yes	No	Yes	No	No	No	No	No	Disabled by default	No	Experimental	Disable by default
Implementation	Block cipher with mode of operation										Stream cipher	None
	AES GCM [116]	AES CCM [117]	AES CBC	Camellia GCM [118]	Camellia CBC [119]	ARIA GCM [120]	ARIA CBC [120]	SEED CBC [121]	3DES EDE CBC (insecure)[122]	GOST 28147-89 CNT (proposed) [82][n 1]	ChaCha20-Poly1305 [123]	Null (insecure) [n 2]

Notes

1. This algorithm is not defined yet as TLS cipher suites in RFCs, is proposed in drafts.
2. authentication only, no encryption
3. This algorithm is implemented in an NSS fork used by Pale Moon.

Obsolete algorithms

Implementation	Block cipher with mode of operation				Stream cipher
	IDEA CBC [n 1](insecure)[143]	DES CBC (insecure) [n 1]	DES-40 CBC (EXPORT, insecure) [n 2]	RC2-40 CBC (EXPORT, insecure) [n 2]	RC4-128 (insecure) [n 3]	RC4-40 (EXPORT, insecure) [n 4][n 2]
Botan	No	No	No	No	No[144]	No
BoringSSL	No	No	No	No	Disabled by default at compile time	No
BSAFE Micro-Edition Suite	No	No	No	No	Disabled by default	No
BSAFE SSL-J	No	Disabled by default	Disabled by default	No	Disabled by default	Disabled by default
cryptlib	No	Disabled by default at compile time	No	No	Disabled by default at compile time	No
GnuTLS	No	No	No	No	Disabled by default[38]	No
JSSE	No	Disabled by default	Disabled by default	No	Disabled by default	Disabled by default [145]
LibreSSL	Yes	Yes	No[42]	No[42]	Yes	No[42]
MatrixSSL	Yes	No	No	No	Disabled by default	No
Mbed TLS	No	Disabled by default at compile time	No	No	Disabled by default at compile time[45]	No
NSS	Yes	Disabled by default	Disabled by default	Disabled by default	Lowest priority[146][147]	Disabled by default
OpenSSL	Disabled by default[51]	Disabled by default	No[51]	No[51]	Disabled by default	No[51]
SChannel XP/2003	No	Yes	Yes	Yes	Yes	Yes
SChannel Vista/2008	No	Disabled by default	Disabled by default	Disabled by default	Yes	Disabled by default
SChannel 7/2008R2	No	Disabled by default	Disabled by default	Disabled by default	Lowest priority will be disabled soon[148]	Disabled by default
SChannel 8/2012	No	Disabled by default	Disabled by default	Disabled by default	Only as fallback	Disabled by default
SChannel 8.1/2012R2	No	Disabled by default	Disabled by default	Disabled by default	Disabled by default[148]	Disabled by default
Schannel 10[141]	No	Disabled by default	Disabled by default	Disabled by default	Disabled by default[148]	Disabled by default
Secure Transport OS X 10.6	Yes	Yes	Yes	Yes	Yes	Yes
Secure Transport OS X 10.7	Yes	Un­known	Un­known	Un­known	Yes	Un­known
Secure Transport OS X 10.8-10.9	Yes	Disabled by default	Disabled by default	Disabled by default	Yes	Disabled by default
Secure Transport OS X 10.10-10.11	Yes	Disabled by default	Disabled by default	Disabled by default	Lowest priority	Disabled by default
Secure Transport macOS 10.12	Yes	Disabled by default	Disabled by default	Disabled by default	Disabled by default	Disabled by default
wolfSSL	Disabled by default[149]	No	No	No	Disabled by default	No
Erlang/OTP SSL application	no	Disabled by default	no	no	Disabled by default	no
Implementation	Block cipher with mode of operation				Stream cipher
	IDEA CBC [n 1](insecure)[143]	DES CBC (insecure) [n 1]	DES-40 CBC (EXPORT, insecure) [n 2]	RC2-40 CBC (EXPORT, insecure) [n 2]	RC4-128 (insecure) [n 3]	RC4-40 (EXPORT, insecure) [n 4][n 2]

Notes

1. IDEA and DES have been removed from TLS 1.2.[142]
2. 40 bits strength of cipher suites were designed to operate at reduced key lengths in order to comply with US regulations about the export of cryptographic software containing certain strong encryption algorithms (see Export of cryptography from the United States). These weak suites are forbidden in TLS 1.1 and later.
3. The RC4 attacks weaken or break RC4 used in SSL/TLS. Use of RC4 is prohibited by RFC 7465.
4. The RC4 attacks weaken or break RC4 used in SSL/TLS.

Supported elliptic curves

This section lists the supported elliptic curves by each implementation.

Implementation	sect163k1 NIST K-163 (1)[81]	sect163r1 (2)[81]	sect163r2 NIST B-163 (3)[81]	sect193r1 (4)[81]	sect193r2 (5)[81]	sect233k1 NIST K-233 (6)[81]	sect233r1 NIST B-233 (7)[81]	sect239k1 (8)[81]	sect283k1 NIST K-283 (9)[81]	sect283r1 NIST B-283 (10)[81]	sect409k1 NIST K-409 (11)[81]	sect409r1 NIST B-409 (12)[81]	sect571k1 NIST K-571 (13)[81]	sect571r1 NIST B-571 (14)[81]
Botan	No	No	No	No	No	No	No	No	No	No	No	No	No	No
BoringSSL	No	No	No	No	No	No	No	No	No	No	No	No	No	No
BSAFE	Yes	No	Yes	No	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes
GnuTLS	No	No	No	No	No	No	No	No	No	No	No	No	No	No
JSSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
LibreSSL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MatrixSSL	No	No	No	No	No	No	No	No	No	No	No	No	No	No
Mbed TLS	No	No	No	No	No	No	No	No	No	No	No	No	No	No
NSS	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
OpenSSL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SChannel Vista/2008, 7/2008R2, 8/2012, 8.1/2012R2, 10	No	No	No	No	No	No	No	No	No	No	No	No	No	No
Secure Transport	No	No	No	No	No	No	No	No	No	No	No	No	No	No
wolfSSL	No	No	No	No	No	No	No	No	No	No	No	No	No	No
Erlang/OTP SSL application	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Implementation	sect163k1 NIST K-163 (1)	sect163r1 (2)	sect163r2 NIST B-163 (3)	sect193r1 (4)	sect193r2 (5)	sect233k1 NIST K-233 (6)	sect233r1 NIST B-233 (7)	sect239k1 (8)	sect283k1 NIST K-283 (9)	sect283r1 NIST B-283 (10)	sect409k1 NIST K-409 (11)	sect409r1 NIST B-409 (12)	sect571k1 NIST K-571 (13)	sect571r1 NIST B-571 (14)

Implementation	secp160k1 (15)[81]	secp160r1 (16)[81]	secp160r2 (17)[81]	secp192k1 (18)[81]	secp192r1 prime192v1 NIST P-192 (19)[81]	secp224k1 (20)[81]	secp224r1 NIST P-244 (21)[81]	secp256k1 (22)[81]	secp256r1 prime256v1 NIST P-256 (23)[81]	secp384r1 NIST P-384 (24)[81]	secp521r1 NIST P-521 (25)[81]	arbitrary prime curves (0xFF01)[81][150]	arbitrary char2 curves (0xFF02)[81][150]
Botan	No	No	No	No	No	No	No	No	Yes	Yes	Yes	No	No
BoringSSL	No	No	No	No	No	No	Yes	No	Yes	Yes	Yes (disabled by default)	No	No
BSAFE	No	No	No	No	Yes	No	Yes	No	Yes	Yes	Yes	No	No
GnuTLS	No	No	No	No	Yes	No	Yes	No	Yes	Yes	Yes	No	No
JSSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
LibreSSL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
MatrixSSL	No	No	No	No	Yes	No	Yes	No	Yes	Yes	Yes	No	No
Mbed TLS	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
NSS	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
OpenSSL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
SChannel Vista/2008, 7/2008R2, 8/2012, 8.1/2012R2, 10	No	No	No	No	No	No	No	No	Yes	Yes	Yes	No	No
Secure Transport	No	No	No	No	Yes	No	No	No	Yes	Yes	Yes	No	No
wolfSSL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
Erlang/OTP SSL application	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
Implementation	secp160k1 (15)	secp160r1 (16)	secp160r2 (17)	secp192k1 (18)	secp192r1 prime192v1 NIST P-192 (19)	secp224k1 (20)	secp224r1 NIST P-244 (21)	secp256k1 (22)	secp256r1 prime256v1 NIST P-256 (23)	secp384r1 NIST P-384 (24)	secp521r1 NIST P-521 (25)	arbitrary prime curves (0xFF01)	arbitrary char2 curves (0xFF02)

Implementation	brainpoolP256r1 (26)[151]	brainpoolP384r1 (27)[151]	brainpoolP512r1 (28)[151]	X25519 [152]	Curve448 Ed448-Goldilocks [153]	M221 Curve2213 [154]	E222 [154]	Curve1174 [154]	E382 [154]	M383 [154]	Curve383187 [154]	Curve41417 Curve3617 [154]	M511 Curve511187 [154]	E521 [154]
Botan	Yes[155]	Yes[155]	Yes[155]	Yes[124]	No	No	No	No	No	No	No	No	No	No
BoringSSL	No	No	No	Yes	No	No	No	No	No	No	No	No	No	No
BSAFE	No	No	No	No	No	No	No	No	No	No	No	No	No	No
GnuTLS	No	No	No	Yes[156]	No	No	No	No	No	No	No	No	No	No
JSSE	No	No	No	Yes (JDK 13+)[157]	No	No	No	No	No	No	No	No	No	No
LibreSSL	Yes[42]	Yes[42]	Yes[42]	Yes[158]	No	No	No	No	No	No	No	No	No	No
MatrixSSL	Yes	Yes	Yes	TLS 1.3 only[159]	No	No	No	No	No	No	No	No	No	No
Mbed TLS	Yes[160]	Yes[160]	Yes[160]	Primitive only[161]	Primitive only[162]	No	No	No	No	No	No	No	No	No
NSS	No[163]	No[163]	No[163]	Yes[164]	No	No	No	No	No	No	No	No	No	No
OpenSSL	Yes[53]	Yes[53]	Yes[53]	Yes[165][166]	Yes[167][168]	No	No	No	No	No	No	No	No	No
SChannel Vista/2008, 7/2008R2, 8/2012, 8.1/2012R2, 10	No	No	No	No	No	No	No	No	No	No	No	No	No	No
Secure Transport	No	No	No	No	No	No	No	No	No	No	No	No	No	No
wolfSSL	Yes	Yes	Yes	Yes[169]	No	No	No	No	No	No	No	No	No	No
Erlang/OTP SSL application	Yes	Yes	Yes	No	No	No	No	No	No	No	No	No	No	No
Implementation	brainpoolP256r1 (26)	brainpoolP384r1 (27)	brainpoolP512r1 (28)	Curve25519	Curve448 Ed448-Goldilocks	M221 Curve2213	E222	Curve1174	E382	M383	Curve383187	Curve41417 Curve3617	M511 Curve511187	E521

Data integrity

Implementation	HMAC-MD5	HMAC-SHA1	HMAC-SHA256/384	AEAD	GOST 28147-89 IMIT[82]	GOST R 34.11-94[82]
Botan	No	Yes	Yes	Yes	No	No
BSAFE	Yes	Yes	Yes	Yes	No	No
cryptlib	Yes	Yes	Yes	Yes	No	No
GnuTLS	Yes	Yes	Yes	Yes	No	No
JSSE	Yes	Yes	Yes	Yes	No[83]	No[83]
LibreSSL	Yes	Yes	Yes	Yes	Yes[84]	Yes[84]
MatrixSSL	Yes	Yes	Yes	Yes	No	No
Mbed TLS	Yes	Yes	Yes	Yes	No	No
NSS	Yes	Yes	Yes	Yes	No[86][87]	No[86][87]
OpenSSL	Yes	Yes	Yes	Yes	Yes[88]	Yes[88]
SChannel XP/2003, Vista/2008	Yes	Yes	XP SP3, 2003 SP2 via hotfix[170]	No	No[89]	No[89]
SChannel 7/2008R2, 8/2012, 8.1/2012R2	Yes	Yes	Yes	except ECDHE_RSA[91][92][93]	No[89]	No[89]
SChannel 10	Yes	Yes	Yes	Yes[141]	No[89]	No[89]
Secure Transport	Yes	Yes	Yes	Yes	No	No
wolfSSL	Yes	Yes	Yes	Yes	No	No
Erlang/OTP SSL application	Yes	Yes	Yes	Yes	No	No
Implementation	HMAC-MD5	HMAC-SHA1	HMAC-SHA256/384	AEAD	GOST 28147-89 IMIT	GOST R 34.11-94

Compression

Note the CRIME security exploit takes advantage of TLS compression, so conservative implementations do not enable compression at the TLS level. HTTP compression is unrelated and unaffected by this exploit, but is exploited by the related BREACH attack.

Implementation	DEFLATE[171] (insecure)
Botan	No
BSAFE[37]	No
cryptlib	No
GnuTLS	Disabled by default
JSSE	No
LibreSSL	No[42]
MatrixSSL	Disabled by default
Mbed TLS	Disabled by default
NSS	Disabled by default
OpenSSL	Disabled by default
SChannel	No
Secure Transport	No
wolfSSL	Disabled by default
Erlang/OTP SSL application	No
Implementation	DEFLATE

Extensions

In this section the extensions each implementation supports are listed. Note that the Secure Renegotiation extension is critical for HTTPS client security . TLS clients not implementing it are vulnerable to attacks, irrespective of whether the client implements TLS renegotiation.

Implementation	Secure Renegotiation [172]	Server Name Indication [173]	ALPN [174]	Certificate Status Request [173]	OpenPGP [175]	Supplemental Data [176]	Session Ticket [177]	Keying Material Exporter [178]	Maximum Fragment Length [173]	Truncated HMAC [173]	Encrypt-then-MAC [179]	TLS Fallback SCSV [180]	Extended Master Secret [181]	ClientHello Padding [182]	Raw Public Keys [183]
Botan	Yes	Yes	Yes[184]	No	No	No	Yes	Yes	Yes	No	Yes	Yes[185]	Yes[186]	No	Un­known
BSAFE Micro-Edition Suite	Yes	Yes	No	Yes	No	No	Yes	No	Yes	Yes	No	No	No	No	No
BSAFE SSL-J	Yes	Yes	No	No	No	No	No	No	Yes	Yes	No	No	No	No	No
cryptlib	Yes	Yes	No	No	No	Yes	No	No	No[187]	No	Yes	Yes	Yes	No	Un­known
GnuTLS	Yes	Yes	Yes[188]	Yes	No[189]	Yes	Yes	Yes	Yes	No	Yes[38]	Yes[190]	Yes[38]	Yes[191]	Yes[192]
JSSE	Yes	Yes[65]	Yes[65]	Yes	No	No	Yes	No	Yes	No	No	No	Yes	No	No
LibreSSL	Yes	Yes	Yes[193]	Yes	No	No?	Yes	Yes?	No	No	No	Server side only[194]	No	Yes	No
MatrixSSL	Yes	Yes	Yes[195]	Yes[129]	No	No	Yes	No	Yes	Yes	No	Yes[129]	Yes[129]	No	Un­known
Mbed TLS	Yes	Yes	Yes[196]	No	No	No	Yes	No	Yes	Disabled by default[45]	Yes[197]	Yes[197]	Yes[197]	No	No
NSS	Yes	Yes	Yes[198]	Yes	No[199]	No	Yes	Yes	No	No	No[200]	Yes[201]	Yes[202]	Yes[198]	Un­known
OpenSSL	Yes	Yes	Yes[53]	Yes	No	No?	Yes	Yes	Yes	No	Yes	Yes[203]	Yes[204]	Yes[205]	No
SChannel XP/2003	No	No	No	No	No	Yes	No	No	No	No	No	No	No	No	Un­known
SChannel Vista/2008	Yes	Yes	No	No	No	Yes	No	No	No	No	No	No	Yes[206]	No	Un­known
SChannel 7/2008R2	Yes	Yes	No	Yes	No	Yes	No	No	No	No	No	No	Yes[206]	No	Un­known
SChannel 8/2012	Yes	Yes	No	Yes	No	Yes	Client side only[207]	No	No	No	No	No	Yes[206]	No	Un­known
SChannel 8.1/2012R2, 10	Yes	Yes	Yes	Yes	No	Yes	Yes[207]	No	No	No	No	No	Yes[206]	No	Un­known
Secure Transport	Yes	Yes	Un­known	No	No	Yes	No	No	No	No	No	No	No	No	Un­known
wolfSSL	Yes	Yes	Yes[149]	Yes	No	No	Yes	No	Yes	Yes	No	No	Yes	No	Un­known
Erlang/OTP SSL application	Yes	Yes	Yes	No	No	No	No	No	No	No	No	Yes	No	No	Un­known
Implementation	Secure Renegotiation	Server Name Indication	ALPN	Certificate Status Request	OpenPGP	Supplemental Data	Session Ticket	Keying Material Exporter	Maximum Fragment Length	Truncated HMAC	Encrypt-then-MAC	TLS Fallback SCSV	Extended Master Secret	ClientHello Padding	Raw Public Keys

Assisted cryptography

This section lists the known ability of an implementation to take advantage of CPU instruction sets that optimize encryption, or utilize system specific devices that allow access to underlying cryptographic hardware for acceleration or for data separation.

Implementation	PKCS #11 device	Intel AES-NI	VIA PadLock	ARMv8-A	Intel SGX	Intel QAT	Intel SHA
Botan	Yes[208]	Yes	No	Yes	No	No
BSAFE Micro Edition Suite	Yes	Yes	No	Yes	No	No	Yes
BSAFE SSL-J [lower-alpha 1][lower-alpha 2]	Yes	Yes	No	Yes	No	No	Yes
cryptlib	Yes	Yes	Yes	No		No
Crypto++		Yes				No	Yes
GnuTLS	Yes	Yes	Yes	Yes[211]	No	No
JSSE	Yes	Yes[212]	No	No		No
LibreSSL	No	Yes	Yes	No		No
MatrixSSL	Yes	Yes	No	Yes		No
Mbed TLS	Yes	Yes[213]	Yes	No		No
NSS	Yes[214]	Yes[215]	No[216]	No		No
OpenSSL	Yes[217]	Yes	Yes	Yes[218]		No	Yes
SChannel	No	Yes	No	No		No
Secure Transport	No	Yes[219][220]	No	Yes		No
wolfSSL	Yes	Yes	No	Yes	Yes	Yes[221]
Implementation	PKCS #11 device	Intel AES-NI	VIA PadLock	ARMv8-A	Intel SGX	Intel QAT	Intel SHA

1. Pure Java implementations relies on JVM processor optimization capabilities, such as OpenJDK support for AES-NI[209]
2. BSAFE SSL-J can be configured to run in native mode, using BSAFE Crypto-C Micro Edition to benefit from processor optimization.[210]

System-specific backends

This section lists the ability of an implementation to take advantage of the available operating system specific backends, or even the backends provided by another implementation.

Implementation	/dev/crypto	af_alg	Windows CSP	CommonCrypto	OpenSSL engine
Botan	No	No	No	No	Partial
BSAFE	No	No	No	No	No
cryptlib	No	No	No	No	No
GnuTLS	Yes	No	No	No	No
JSSE	No	No	Yes	No	No
LibreSSL	No	No	No	No	No[222]
MatrixSSL	No	No	No	Yes	Yes
Mbed TLS	No	No	No	No	No
NSS	No	No	No	No	No
OpenSSL	Yes	Yes	No	No	Yes
SChannel	No	No	Yes	No	No
Secure Transport	No	No	No	Yes	No
wolfSSL	Yes	Yes	Partial	No	No
Erlang/OTP SSL application	No	No	No	No	Yes
Implementation	/dev/crypto	af_alg	Windows CSP	CommonCrypto	OpenSSL engine

Cryptographic module/token support

Implementation	TPM support	Hardware token support	Objects identified via
Botan	Partial[186]	PKCS11
BSAFE Micro-Edition Suite	No	PKCS11 (via 3rd party module)	User-defined label
BSAFE SSL-J	No	No
cryptlib	No	PKCS11	User-defined label
GnuTLS	Yes	PKCS11	RFC 7512 PKCS #11 URLs[223]
JSSE	No	PKCS11 Java Cryptography Architecture, Java Cryptography Extension
LibreSSL	Yes	PKCS11 (via 3rd party module)	Custom method
MatrixSSL	No	PKCS11
Mbed TLS	No	PKCS11 (via libpkcs11-helper) or standard hooks	Custom method
NSS	No	PKCS11
OpenSSL	Yes	PKCS11 (via 3rd party module)[224]	RFC 7512 PKCS #11 URLs[223]
SChannel	No	Microsoft CryptoAPI	UUID, User-defined label
Secure Transport
wolfSSL	Yes	PKCS11
Implementation	TPM support	Hardware token support	Objects identified via

Code dependencies

Implementation	Dependencies	Optional dependencies
Botan	C++11	sqlite zlib (compression) bzip2 (compression) liblzma (compression) boost openssl (crypto backend) trousers (TPM)
GnuTLS	libc nettle gmp	zlib (compression) p11-kit (PKCS #11) trousers (TPM) libunbound (DANE)
JSSE	Java
MatrixSSL	none	zlib (compression)
MatrixSSL-open	libc or newlib
Mbed TLS	libc	libpkcs11-helper (PKCS #11) zlib (compression)
NSS	libc libnspr4 libsoftokn3 libplc4 libplds4	zlib (compression)
OpenSSL	libc	zlib (compression)
wolfSSL	None	libc zlib (compression)
Erlang/OTP ssl application	libcrypto (from OpenSSL), Erlang/OTP and its public_key, crypto and asn1 applications	Erlang/OTP -inets (http fetching of CRLs)
Implementation	Dependencies	Optional dependencies

Development environment

Implementation	Namespace	Build tools	API manual	Crypto back-end	OpenSSL compatibility Layer
Botan	Botan::TLS	Makefile	Sphinx	Included (pluggable)	No
Bouncy Castle	org.bouncycastle	Java Development Environment	Programmers reference manual (PDF)	Included (pluggable)	No
BSAFE Micro-Edition Suite	R_*	Makefile	Developer's guide	Included	No
BSAFE SSL-J	com.rsa.asn1^[a] com.rsa.certj^[b] com.rsa.jcp^[c] com.rsa.jsafe^[d] com.rsa.ssl^[e] com.rsa.jsse^[f]	Java classloader	Javadoc, Developer's guide (HTML)	Included	No
cryptlib	crypt*	makefile, MSVC project workspaces	Programmers reference manual (PDF), architecture design manual (PDF)	Included (monolithic)	No
GnuTLS	gnutls_*	Autoconf, automake, libtool	Manual and API reference (HTML, PDF)	External, libnettle	Yes (limited)
JSSE	javax.net.ssl sun.security.ssl	Makefile	API Reference (HTML) + JSSE Reference Guide	Java Cryptography Architecture, Java Cryptography Extension	No
MatrixSSL	matrixSsl_* ps*	Makefile, MSVC project workspaces, Xcode projects for OS X and iOS	API Reference (PDF), Integration Guide	Included (pluggable)	Yes (Subset: SSL_read, SSL_write, etc.)
Mbed TLS	mbedtls_ssl_* mbedtls_sha1_* mbedtls_md5_* mbedtls_x509* ...	Makefile, CMake, MSVC project workspaces, yotta	API Reference + High Level and Module Level Documentation (HTML)	Included (monolithic)	No
NSS	CERT_* SEC_* SECKEY_* NSS_* PK11_* SSL_* ...	Makefile	Manual (HTML)	Included, PKCS#11 based[225]	Yes (separate package called nss_compat_ossl[226])
OpenSSL	SSL_* SHA1_* MD5_* EVP_* ...	Makefile	Man pages	Included (monolithic)	N/A
wolfSSL	wolfSSL_* CyaSSL_* SSL_*	Autoconf, automake, libtool, MSVC project workspaces, XCode projects, CodeWarrior projects, MPLAB X projects, Keil, IAR, Clang, GCC, e2Studio	Manual and API Reference (HTML, PDF)	Included (monolithic)	Yes (about 10% of API)
Implementation	Namespace	Build tools	API manual	Crypto back-end	OpenSSL compatibility layer

1. ^
   ASN.1 manipulation classes
2. ^
   Cert-J proprietary API
3. ^
   Certificate Path manipulation classes
4. ^
   Crypto-J proprietary API, JCE, CMS and PKI
API
5. ^
   SSLJ proprietary API
6. ^
   JSSE API

Portability concerns

Implementation	Platform requirements	Network requirements	Thread safety	Random seed	Able to cross-compile	No OS (bare metal)	Supported operating systems
Botan	C++11	None	Thread-safe	Platform-dependent	Yes		Windows, Linux, macOS, Android, iOS, FreeBSD, OpenBSD, Solaris, AIX, HP-UX, QNX, BeOS, IncludeOS
BSAFE Micro Edition Suite	C89	None	Thread-safe	Platform dependent	Yes	No	FreeBSD, Linux, macOS, Microsoft Windows, Android, iOS, AIX, Solaris
BSAFE SSL-J	Java	Java SE network components	Thread-safe	Depends on java.security.SecureRandom	Yes	No	FreeBSD, Linux, macOS, Microsoft Windows, Android, AIX, Solaris
cryptlib	C89	POSIX send() and recv(). API to supply your own replacement	Thread-safe	Platform-dependent, including hardware sources	Yes	Yes	AMX, BeOS, ChorusOS, DOS, eCos, FreeRTOS/OpenRTOS, uItron, MVS, OS/2, Palm OS, QNX Neutrino, RTEMS, Tandem NonStop, ThreadX, uC/OS II, Unix (AIX, FreeBSD, HPUX, Linux, OS X, Solaris, etc.), VDK, VM/CMS, VxWorks, Win16, Win32, Win64, WinCE/PocketPC/etc, XMK
GnuTLS	C89	POSIX send() and recv(). API to supply your own replacement.	Thread-safe, needs custom mutex hooks if neither POSIX nor Windows threads are available.	Platform dependent	Yes	No	Generally any POSIX platforms or Windows, commonly tested platforms include GNU/Linux, Win32/64, OS X, Solaris, OpenWRT, FreeBSD, NetBSD, OpenBSD.
JSSE	Java	Java SE network components	Thread-safe	Depends on java.security.SecureRandom	Yes		Java based, platform-independent
MatrixSSL	C89	None	Thread-safe	Platform dependent	Yes	Yes	All
Mbed TLS	C89	POSIX read() and write(). API to supply your own replacement.	Threading layer available (POSIX or own hooks)	Random seed set through entropy pool	Yes	Yes	Known to work on: Win32/64, Linux, OS X, Solaris, FreeBSD, NetBSD, OpenBSD, OpenWRT, iPhone (iOS), Xbox, Android, SeggerOS
NSS	C89, NSPR[227]	NSPR[227] PR_Send() and PR_Recv(). API to supply your own replacement.	Thread-safe	Platform dependent[228]	Yes (but cumbersome)	No	AIX, Android, FreeBSD, NetBSD, OpenBSD, BeOS, HP-UX, IRIX, Linux, OS X, OS/2, Solaris, OpenVMS, Amiga DE, Windows, WinCE, Sony PlayStation
OpenSSL	C89	None	Thread-safe	Platform dependent	Yes	No	Unix, DOS (with djgpp), Windows, OpenVMS, MacOS, NetWare, eCos
wolfSSL	C89	POSIX send() and recv(). API to supply your own replacement.	Thread-safe, needs mutex hooks if PThreads or WinThreads not available, can be turned off	Random seed set through wolfCrypt	Yes	Yes	Win32/64, Linux, OS X, Solaris, ThreadX, VxWorks, FreeBSD, NetBSD, OpenBSD, embedded Linux, Yocto Project, OpenEmbedded, WinCE, Haiku, OpenWRT, iPhone (iOS), Android, Nintendo Wii and Gamecube through DevKitPro, QNX, MontaVista, NonStop, TRON/ITRON/µITRON, Micrium µC/OS-III, FreeRTOS, SafeRTOS, NXP/Freescale MQX, Nucleus, TinyOS, HP/UX, AIX, ARC MQX, Keil RTX, TI-RTOS, uTasker, embOS, INtime, Mbed, uT-Kernel, RIOT, CMSIS-RTOS, FROSTED, Green Hills INTEGRITY, TOPPERS, PetaLinux, Apache mynewt
Implementation	Platform requirements	Network requirements	Thread safety	Random seed	Able to cross-compile	No OS (bare metal)	Supported operating systems

See also

• SCTP — with DTLS support
• DCCP — with DTLS support
• SRTP — with DTLS support (DTLS-SRTP) and Secure Real-Time Transport Control Protocol (SRTCP)

References

1. "Botan: Release Notes". Retrieved 2020-10-29.
2. "Release Notes - bouncycastle.org". 2020-12-21. Retrieved 2020-12-23.
3. "Java FIPS Resources - bouncycastle.org". 2019-08-24. Retrieved 2019-08-29.
4. "The Legion of the Bouncy Castle C# Cryptography APIs". 2020-12-09. Retrieved 2020-12-10.
5. "C# .NET FIPS Resources - bouncycastle.org". 2016-11-11. Retrieved 2017-08-28.
6. "Dell BSAFE Crypto-C Micro Edition 4.1.5 and Micro Edition Suite 4.6 Release Advisory".
7. Gutmann, Peter (2019). "Downloading". cryptlib. University of Auckland School of Computer Science. Retrieved 2019-08-07.
8. "The GnuTLS Transport Layer Security Library". Retrieved 30 June 2020.
9. "OpenJDK 15 Updates". Oracle Corporation. Retrieved 2021-01-23.
10. "OpenJDK 11 Updates". Oracle Corporation. Retrieved 2021-01-23.
11. "OpenJDK 8 Updates". Oracle Corporation. Retrieved 2021-01-23.
12. "LibreSSL". Retrieved 9 December 2020.
13. "LibreSSL Releases". Retrieved 9 December 2020.
14. The features listed are for the closed source version
15. "MatrixSSL 4.2.2 Open release". 2019-09-11. Retrieved 2020-03-20.
16. "Release Mbed TLS 2.25.0 · ARMmbed/mbedtls". Retrieved 2021-02-07.
17. "Release notes for recent versions of NSS". Mozilla Developer Network. Retrieved 30 January 2021.
18. "OpenSSL: Newslog". Retrieved 2020-12-08.
19. "wolfSSL product description". Retrieved 2016-05-03.
20. "wolfSSL Embedded SSL/TLS". Retrieved 2016-05-03.
21. "wolfSSL ChangeLog". 2020-12-22. Retrieved 2020-12-26.
22. RFC 6176: Prohibiting Secure Sockets Layer (SSL) Version 2.0
23. ""CBC-Padding: Security Flaws in SSL, IPsec, WTLS,...", Serge Vaudenay, 2001" (PDF).
24. RFC 7366: Encrypt-then-MAC for Transport Layer Security (TLS) and Datagram Transport Layer Security
25. "Rizzo/Duong BEAST Countermeasures".
26. Möller, Bodo; Duong, Thai; Kotowicz, Krzysztof (September 2014). "This POODLE Bites: Exploiting The SSL 3.0 Fallback" (PDF). Retrieved 15 October 2014.
27. TLSv1.2's Major Differences from TLSv1.1
28. RFC 6347
29. "Bard attack". 2006: 7–10. CiteSeerX 10.1.1.61.5887. Cite journal requires |journal= (help)
30. "draft-hickman-netscape-ssl-00". tools.ietf.org.
31. RFC 6101
32. RFC 2246
33. RFC 4346
34. RFC 5246
35. RFC 4347
36. "Version 1.11.13, 2015-01-11 — Botan". 2015-01-11. Archived from the original on 2015-01-09. Retrieved 2015-01-16.
37. "RSA BSAFE Technical Specification Comparison Tables" (PDF). Archived from the original (PDF) on 2015-09-24. Retrieved 2015-01-09.
38. "[gnutls-devel] GnuTLS 3.4.0 released". 2015-04-08. Retrieved 2015-04-16.
39. "[gnutls-devel] GnuTLS 3.6.3". 2018-07-16. Retrieved 2018-09-16.
40. "Java™ SE Development Kit 8, Update 31 Release Notes". Retrieved 2015-01-22.
41. "JEP 332: Transport Layer Security (TLS) 1.3". Retrieved 2018-08-27.
42. "OpenBSD 5.6 Released". 2014-11-01. Retrieved 2015-01-20.
43. "LibreSSL 2.3.0 Released". 2015-09-23. Retrieved 2015-09-24.
44. "MatrixSSL - News". Archived from the original on 2015-02-14. Retrieved 2014-11-09.
45. "mbed TLS 2.0.0 released". 2015-07-10. Retrieved 2015-07-14.
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48. "NSS 3.15.1 release notes". Mozilla Developer Network. Mozilla. Retrieved 2013-08-10.
49. "NSS 3.39 release notes". Mozilla Developer Network. Mozilla. 2018-08-31. Retrieved 2018-09-15.
50. "NSS 3.16.2 release notes". Mozilla Developer Network. Mozilla. 2014-06-30. Retrieved 2014-06-30.
51. Inc., OpenSSL Foundation. "/news/openssl-1.1.0-notes.html". www.openssl.org.
52. "Major changes between OpenSSL 1.0.0h and OpenSSL 1.0.1 [14 Mar 2012]". 2012-03-14. Archived from the original on December 5, 2014. Retrieved 2015-01-20.
53. "Major changes between OpenSSL 1.0.1l and OpenSSL 1.0.2 [22 Jan 2015]". Archived from the original on September 4, 2014. Retrieved 2015-01-22.
54. "S2N Readme". 2019-12-21.
55. "TLS Cipher Suites (Windows)". msdn.microsoft.com.
56. "TLS Cipher Suites in Windows Vista (Windows)". msdn.microsoft.com.
57. "Cipher Suites in TLS/SSL (Schannel SSP) (Windows)". msdn.microsoft.com.
58. "An update is available that adds support for DTLS in Windows 7 SP1 and Windows Server 2008 R2 SP1". Microsoft. Retrieved 13 November 2012.
59. "TLS (Schannel SSP) changes in Windows 10 and Windows Server 2016". Microsoft. 2017-03-21. Archived from the original on 2017-03-30. Retrieved 2017-03-29.
60. "@badger: the 1.3 stuff is apparently in iOS 11 and macOS 10.13". 2018-03-09. Retrieved 2018-03-09.
61. "[wolfssl] wolfSSL 3.6.6 Released". 2015-08-20. Retrieved 2015-08-24.
62. "NSS 3.24 release notes". Mozilla Developer Network. Mozilla. Retrieved 2016-06-19.
63. "Technical Note TN2287: iOS 5 and TLS 1.2 Interoperability Issues". iOS Developer Library. Apple Inc. Retrieved 2012-05-03.
64. "Qualys SSL Labs - Projects / User Agent Capabilities". dev.ssllabs.com.
65. "Security Enhancements in JDK 8". docs.oracle.com.
66. "Bug 663320 - (NSA-Suite-B-TLS) Implement RFC6460 (NSA Suite B profile for TLS)". Mozilla. Retrieved 2014-05-19.
67. "Introducing Compliance to Suite B Cryptography".
68. "Secure or Compliant, Pick One" Steve Marquess blog Archived December 27, 2013, at the Wayback Machine
69. "Search - Cryptographic Module Validation Program - CSRC". csrc.nist.gov. Archived from the original on 2014-12-26. Retrieved 2014-03-18.
70. ""Is botan FIPS 140 certified?" Frequently Asked Questions — Botan". Archived from the original on 2014-11-29. Retrieved 2014-11-16.
71. "Search - Cryptographic Module Validation Program - CSRC". csrc.nist.gov.
72. "Search - Cryptographic Module Validation Program - CSRC". csrc.nist.gov.
73. "cryptlib". 11 October 2013. Archived from the original on 11 October 2013.
74. "While, as a free software project, we are not actively pursuing this kind of certification, GnuTLS has been FIPS-140-2 certified in several systems by third parties." GnuTLS 3.5.6 B.5 Certification
75. "Matrix SSL Toolkit" (PDF).
76. Limited, ARM. "Is mbed TLS FIPS certified? - Knowledge Base". polarssl.org.
77. "FIPS Validation - MozillaWiki". wiki.mozilla.org.
78. "OpenSSL and FIPS 140-2". Archived from the original on 2013-05-28. Retrieved 2014-11-15.
79. Microsoft FIPS 140 Validated Cryptographic Modules
80. "wolfCrypt FIPS 140-2 Information - wolfSSL Embedded SSL/TLS Library".
81. RFC 4492
82. draft-chudov-cryptopro-cptls-04 - GOST 28147-89 Cipher Suites for Transport Layer Security (TLS)
83. Extensions to support JSSE in SChannel might be available.
84. "LibreSSL 2.1.2 released". 2014-12-09. Retrieved 2015-01-20.
85. "NSS 3.20 release notes". Mozilla. 2015-08-19. Retrieved 2015-08-20.
86. Mozilla.org. "Bug 518787 - Add GOST crypto algorithm support in NSS". Retrieved 2014-07-01.
87. Mozilla.org. "Bug 608725 - Add Russian GOST cryptoalgorithms to NSS and Thunderbird". Retrieved 2014-07-01.
88. openssl/engines/ccgost/README.gost
89. Extensions to support GOST in SChannel might be available.
90. "Microsoft Security Advisory 3174644".
91. "Microsoft Security Bulletin MS14-066 - Critical (Section Update FAQ)". Microsoft. November 11, 2014. Retrieved 11 November 2014.
92. Thomlinson, Matt (November 11, 2014). "Hundreds of Millions of Microsoft Customers Now Benefit from Best-in-Class Encryption". Microsoft Security. Retrieved 11 November 2014.
93. Update adds new TLS cipher suites and changes cipher suite priorities in Windows 8.1 and Windows Server 2012 R2
94. RFC 5054
95. RFC 4279
96. RFC 5489
97. RFC 2712
98. "RSA BSAFE SSL-J 6.2.4 Release Notes". 2018-09-05.
99. "LibreSSL 2.0.4 released". Retrieved 2014-08-04.
100. "Bug 405155 - add support for TLS-SRP, rfc5054". Mozilla. Retrieved 2014-01-25.
101. "Bug 306435 - Mozilla browsers should support the new IETF TLS-PSK protocol to help reduce phishing". Mozilla. Retrieved 2014-01-25.
102. "Bug 1170510 - Implement NSS server side support for DH_anon". Mozilla. Retrieved 2015-06-03.
103. "Bug 236245 - Update ECC/TLS to conform to RFC 4492". Mozilla. Retrieved 2014-06-09.
104. "Changes between 0.9.6h and 0.9.7 [31 Dec 2002]". Retrieved 2016-01-29.
105. "Changes between 0.9.8n and 1.0.0 [29 Mar 2010]". Retrieved 2016-01-29.
106. "wolfSSL (Formerly CyaSSL) Release 3.9.0 (03/18/2016)". 2016-03-18. Retrieved 2016-04-05.
107. RFC 5280
108. RFC 3280
109. RFC 2560
110. RFC 6698, RFC 7218
111. Laurie, B.; Langley, A.; Kasper, E. (June 2013). Certificate Transparency. IETF. doi:10.17487/RFC6962. ISSN 2070-1721. RFC 6962. Retrieved 2020-08-31.
112. "MatrixSSL 3.8.3". Archived from the original on 2017-01-19. Retrieved 2017-01-18.
113. "mbed TLS 2.0 defaults implement best practices". Retrieved 2017-01-18.
114. "Bug 672600 - Use DNSSEC/DANE chain stapled into TLS handshake in certificate chain validation". Mozilla. Retrieved 2014-06-18.
115. "How Certificate Revocation Works". Microsoft TechNet. Microsoft. March 16, 2012. Retrieved July 10, 2013.
116. RFC 5288, RFC 5289
117. RFC 6655, RFC 7251
118. RFC 6367
119. RFC 5932, RFC 6367
120. RFC 6209
121. RFC 4162
122. "Sweet32: Birthday attacks on 64-bit block ciphers in TLS and OpenVPN". sweet32.info.
123. RFC 7905
124. "Version 1.11.12, 2015-01-02 — Botan". 2015-01-02. Retrieved 2015-01-09.
125. "gnutls 3.6.0". 2017-09-21. Retrieved 2018-01-07.
126. "gnutls 3.4.12". 2016-05-20. Archived from the original on 2016-10-13. Retrieved 2016-05-29.
127. "JDK 10.0.1 Release Notes". 2018-04-18. Retrieved 2018-08-27.
128. "JDK 12 Release Notes". Retrieved 2019-06-20.
129. "Changes in 3.8.3". Retrieved 2016-06-19.
130. "PolarSSL 1.3.8 release notes".
131. "Mbed TLS 2.11.0, 2.7.4 and 2.1.13 released". Retrieved 2018-08-30.
132. "Mbed TLS 2.12.0, 2.7.5 and 2.1.14 released". Retrieved 2018-08-30.
133. "NSS 3.25 release notes". Mozilla Developer Network. Mozilla. Retrieved 2016-07-01.
134. "Bug 940119 - libssl does not support any TLS_ECDHE_*_CAMELLIA_*_GCM cipher suites". Mozilla. Retrieved 2013-11-19.
135. "NSS 3.12 is released". Retrieved 2013-11-19.
136. "NSS 3.12.3 Release Notes". Mozilla Developer Network. Mozilla. Retrieved 2014-07-01.
137. "NSS 3.23 release notes". Mozilla Developer Network. Mozilla. Retrieved 2016-03-09.
138. "openssl/CHANGES at OpenSSL_1_0_1-stable · openssl/openssl". Retrieved 2015-01-20.
139. Inc., OpenSSL Foundation. "/news/openssl-1.1.1-notes.html". www.openssl.org.
140. Hofix 984963: TLS AES cipher suites for Microsoft Windows 2003
141. "Qualys SSL Labs - Projects / User Agent Capabilities: IE 11 / Win 10 Preview". dev.ssllabs.com.
142. RFC 5469
143. "Sweet32: Birthday attacks on 64-bit block ciphers in TLS and OpenVPN".
144. "Version 1.11.15, 2015-03-08 — Botan". 2015-03-08. Retrieved 2015-03-11.
145. "Java Cryptography Architecture Oracle Providers Documentation". docs.oracle.com.
146. "NSS 3.15.3 release notes". Mozilla Developer Network. Mozilla. Retrieved 2014-07-13.
147. "MFSA 2013-103: Miscellaneous Network Security Services (NSS) vulnerabilities". Mozilla. Mozilla. Retrieved 2014-07-13.
148. "RC4 is now disabled in Microsoft Edge and Internet Explorer 11 - Microsoft Edge Dev BlogMicrosoft Edge Dev Blog". blogs.windows.com. 2016-08-09.
149. "wolfSSL (Formerly CyaSSL) Release 3.7.0 (10/26/2015)". 2015-10-26. Retrieved 2015-11-19.
150. Negotiation of arbitrary curves has been shown to be insecure for certain curve sizes Mavrogiannopoulos, Nikos and Vercautern, Frederik and Velichkov, Vesselin and Preneel, Bart (2012). A cross-protocol attack on the TLS protocol. Proceedings of the 2012 ACM conference on Computer and communications security (PDF). pp. 62–72. ISBN 978-1-4503-1651-4.CS1 maint: multiple names: authors list (link)
151. RFC 7027
152. Simon, Josefsson; Yoav, Nir; Manuel, Pégourié-Gonnard. "Elliptic Curve Cryptography (ECC) Cipher Suites for Transport Layer Security (TLS) Versions 1.2 and Earlier". tools.ietf.org.
153. Simon, Josefsson; Manuel, Pégourié-Gonnard. "Curve25519 and Curve448 for Transport Layer Security (TLS)". tools.ietf.org.
154. Simon, Josefsson; Manuel, Pégourié-Gonnard. "Additional Elliptic Curves for Transport Layer Security (TLS) Key Agreement". tools.ietf.org.
155. "Version 1.11.5, 2013-11-10 — Botan". 2013-11-10. Retrieved 2015-01-23.
156. "An overview of the new features in GnuTLS 3.5.0". 2016-05-02. Retrieved 2016-12-09.
157. "JDK 13 Early-Access Release Notes". Retrieved 2019-06-20.
158. "LibreSSL 2.5.1 release notes". OpenBSD. 2017-01-31. Retrieved 2017-02-23.
159. "MatrixSSL 4.0 changelog". Retrieved 2018-09-18.
160. "PolarSSL 1.3.1 released". 2013-10-15. Retrieved 2015-01-23.
161. "PolarSSL 1.3.3 released". 2013-12-31. Retrieved 2015-01-23.
162. "Mbed TLS 2.9.0, 2.7.3 and 2.1.12 released". Retrieved 2018-08-30.
163. "Bug 943639 - Support for Brainpool ECC Curve (rfc5639)". Mozilla. Retrieved 2014-01-25.
164. "Bug 957105 - Add support for curve25519 Key Exchange and UMAC MAC support for TLS". Mozilla. Retrieved 2017-02-23.
165. "OpenSSL 1.1.0x Release Notes". 25 August 2016. Retrieved 18 May 2018.
166. "OpenSSL  GitHub Issue #487 Tracker". 2 December 2015. Retrieved 18 May 2018.
167. "OpenSSL 1.1.1x Release Notes". 1 May 2018. Retrieved 18 May 2018.
168. "OpenSSL  GitHub Issue #5049 Tracker". 9 January 2018. Retrieved 18 May 2018.
169. "wolfSSL (Formerly CyaSSL) Release 3.4.6 (03/30/2015)". 2015-03-30. Retrieved 2015-11-19.
170. "SHA2 and Windows". Retrieved 2014-09-08.
171. RFC 3749
172. RFC 5746
173. RFC 6066
174. RFC 7301
175. RFC 6091
176. RFC 4680
177. RFC 5077
178. RFC 5705
179. RFC 7366
180. RFC 7507
181. RFC 7627
182. RFC 7685
183. RFC 7250
184. "Version 1.11.16, 2015-03-29 — Botan". 2016-03-29. Retrieved 2016-09-08.
185. "Version 1.11.10, 2014-12-10 — Botan". 2014-12-10. Retrieved 2014-12-14.
186. "Version 1.11.26, 2016-01-04 — Botan". 2016-01-04. Retrieved 2016-02-25.
187. Present, but disabled by default due to lack of use by any implementation.
188. "gnutls 3.2.0". Archived from the original on 2016-01-31. Retrieved 2015-01-26.
189. https://lists.gnupg.org/pipermail/gnutls-help/2017-August/004364.html
190. "gnutls 3.4.4". Archived from the original on 2017-07-17. Retrieved 2015-08-25.
191. "%DUMBFW priority keyword". Retrieved 2017-04-30.
192. "gnutls 3.6.6". 2019-01-25. Retrieved 2019-09-01.
193. "LibreSSL 2.1.3 released". 2015-01-22. Retrieved 2015-01-22.
194. "LibreSSL 2.1.4 released". 2015-03-04. Retrieved 2015-03-04.
195. "MatrixSSL - News". 2014-12-04. Archived from the original on 2015-02-14. Retrieved 2015-01-26.
196. "Download overview - PolarSSL". 2014-04-11. Retrieved 2015-01-26.
197. "mbed TLS 1.3.10 released". 2015-02-08. Retrieved 2015-02-09.
198. "NSS 3.15.5 release notes". Mozilla Developer Network. Mozilla. Retrieved 2015-01-26.
199. "Bug 961416 - Support RFC6091 - Using OpenPGP Keys for Transport Layer Security Authentication (TLS1.2)". Mozilla. Retrieved 2014-06-18.
200. "Bug 972145 - Implement the encrypt-then-MAC TLS extension". Mozilla. Retrieved 2014-11-06.
201. "NSS 3.17.1 release notes". Retrieved 2014-10-17.
202. "NSS 3.21 release notes". Retrieved 2015-11-14.
203. http://www.openssl.org/news/secadv_20141015.txt
204. "OpenSSL 1.1.0 Release Notesl".
205. "Major changes between OpenSSL 1.0.1f and OpenSSL 1.0.1g [7 Apr 2014]". 2014-04-07. Archived from the original on 2015-01-20. Retrieved 2015-02-10.
206. "Microsoft Security Bulletin MS15-121". Retrieved 2017-11-29.
207. "What's New in TLS/SSL (Schannel SSP)". Retrieved 2014-06-18.
208. "Version 1.11.31, 2015-08-30 — Botan". 2016-08-30. Retrieved 2016-09-08.
209. "Leverage CPU Instructions for AES Cryptography".
210. "RSA BSAFE SSL-J 6.2.5 - Release Notes".
211. https://lists.gnupg.org/pipermail/gnutls-devel/2016-October/008194.html
212. "Java SSL provider with AES-NI support". stackoverflow.com.
213. "We've incorporated support for AES-NI in our AES and GCM modules". 2013-12-31. Retrieved 2014-01-07.
214. Normally NSS's libssl performs all operations via the PKCS#11 interface, either to hardware or software tokens
215. "Bug 706024 - AES-NI enhancements to NSS on Sandy Bridge systems". Retrieved 2013-09-28.
216. "Bug 479744 - RFE : VIA Padlock ACE support (hardware RNG, AES, SHA1 and SHA256)". Retrieved 2014-04-11.
217. https://habrahabr.ru/post/134725/, http://forum.rutoken.ru/topic/1639/, https://dev.rutoken.ru/pages/viewpage.action?pageId=18055184 (in Russian)
218. "git.openssl.org Git - openssl.git/commitdiff". git.openssl.org.
219. https://opensource.apple.com/source/Security/Security-55179.13/sec/Security/SecECKey.c
220. http://km.support.apple.com/library/APPLE/APPLECARE_ALLGEOS/HT5396/Crypto_Officer_Role_Guide_for_FIPS_140-2_Compliance_OS_X_Mountain_Lion_v10.8.pdf
221. "wolfSSL Asynchronous Intel QuickAssist Support - wolfSSL". 18 January 2017.
222. "LibreSSL 2.2.1 Released". 2015-07-08. Retrieved 2016-01-30.
223. RFC 7512
224. "libp11: PKCS#11 wrapper library". 19 January 2018 – via GitHub.
225. On the fly replaceable/augmentable.
226. "Nss compat ossl - Fedora Project Wiki". fedoraproject.org.
227. "NSPR". Mozilla Developer Network.
228. For Unix/Linux it uses /dev/urandom if available, for Windows it uses CAPI. For other platforms it gets data from clock, and tries to open system files. NSS has a set of platform dependent functions it uses to determine randomness.