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TLS 1.1 (deprecated) TLS 1.2 TLS 1.3 EV certificate SHA-2 certificate ECDSA certificate BEAST CRIME POODLE (SSLv3) RC4 FREAK Logjam Protocol selection by user Microsoft Internet Explorer (1–10) [n 20] Windows Schannel: 1.x: Windows 3.1, 95, NT, [n 21] [n 22] Mac OS 7, 8: No SSL/TLS support 2: Yes No No No No No No No No No SSL 3.0 or TLS ...
What has changed is the versions of the algorithms that are supported in the cipher suites. Each version of TLS has added support for stronger versions of the algorithms and removed support for versions of the algorithms that have been identified as insecure. TLS 1.3 marks a change in how cipher suites are coordinated between machines.
The publishing of TLS 1.3 and DTLS 1.3 obsoleted TLS 1.2 and DTLS 1.2. Note that there are known vulnerabilities in SSL 2.0 and SSL 3.0. In 2021, IETF published RFC 8996 also forbidding negotiation of TLS 1.0, TLS 1.1, and DTLS 1.0 due to known vulnerabilities. NIST SP 800-52 requires support of TLS 1.3 by January 2024.
TLS 1.3 support was subsequently added — but due to compatibility issues for a small number of users, not automatically enabled [50] — to Firefox 52.0, which was released in March 2017. TLS 1.3 was enabled by default in May 2018 with the release of Firefox 60.0. [51] Google Chrome set TLS 1.3 as the default version for a short time in 2017.
Suite B support for TLS 1.2 and DTLS 1.2; Support for DTLS 1.2; TLS automatic elliptic curve (EC) selection; API to set TLS supported signature algorithms and curves; SSL_CONF configuration API; TLS Brainpool support; ALPN support; CMS support for RSA-PSS, RSA-OAEP, ECDH and ANSI X9.42; FIPS 140 support; 1.0.2u (20 December 2019 ())
TLS-PSK uses symmetric keys, shared in advance among the communicating parties, to establish a TLS connection. There are several reasons to use PSKs: Using pre-shared keys can, depending on the ciphersuite, avoid the need for public key operations. This is useful if TLS is used in performance-constrained environments with limited CPU power.
The two building blocks of the construction, the algorithms Poly1305 and ChaCha20, were both independently designed, in 2005 and 2008, by Daniel J. Bernstein. [2] [3]In March 2013, a proposal was made to the IETF TLS working group to include Salsa20, a winner of the eSTREAM competition [4] to replace the aging RC4-based ciphersuites.
HTTP/2 is defined both for HTTP URIs (i.e. without TLS encryption, a configuration which is abbreviated in h2c) and for HTTPS URIs (over TLS using ALPN extension [45] where TLS 1.2 or newer is required, a configuration which is abbreviated in h2).