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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 1.1 (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 ...
Although this vulnerability only exists in SSL 3.0 and most clients and servers support TLS 1.0 and above, all major browsers voluntarily downgrade to SSL 3.0 if the handshakes with newer versions of TLS fail unless they provide the option for a user or administrator to disable SSL 3.0 and the user or administrator does so [citation needed].
TLS 1.3 includes a TLS Handshake Protocol that differs compared to past and the current version of TLS/SSL. After coordinating which cipher suite to use, the server and the client still have the ability to change the coordinated ciphers by using the ChangeCipherSpec protocol in the current handshake or in a new handshake.
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).
6 Firefox 39 vs RC4. 3 comments. 7 Firefox 43 RC4 whitelist has been reverted. 2 comments. 8 SHA-1 deprecation. 2 comments. 9 TLS 1.3. 2 comments. 10 SWEET 32.
There is no DTLS 1.1 because this version-number was skipped in order to harmonize version numbers with TLS. [2] Like previous DTLS versions, DTLS 1.3 is intended to provide "equivalent security guarantees [to TLS 1.3] with the exception of order protection/non-replayability".
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 ())