What are the different version numbers of TLS?
What is TLS? #
- TLS 1.0 – Released in 1999 and published as RFC 2246. This version of TLS was very similar to SSL 3.0.
- TLS 1.1 – Released in 2006 and published as RFC 4346.
- TLS 1.2 – Released in 2008 and published as RFC 5246.
- TLS 1.3 – As of January 2016 this version of TLS is in working draft.
What is the RFC number the tls1 2?
TLS 1.0 was RFC 2246, TLS 1.1 was RFC 4346, and TLS 1.2 was RFC 5246. Today, TLS 1.3 was published as RFC 8446. RFCs are generally published in order, keeping 46 as part of the RFC number is a nice touch.
What is TCP TLS?
The Transport Layer Security (TLS) protocol adds a layer of security on top of the TCP/IP transport protocols. TLS uses both symmetric encryption and public key encryption for securely sending private data, and adds additional security features, such as authentication and message tampering detection.
Why does TLS start with a type and length?
Each handshake message starts with a type and a length. The protocol version of “3,3” (meaning TLS 1.2) is given. The unusual version number (“3,3” representing TLS 1.2) is due to TLS 1.0 being a minor revision of the SSL 3.0 protocol. Therefore TLS 1.0 is represented by “3,1”, TLS 1.1 is “3,2”, and so on.
How many bytes can be saved in TLS 1.2?
TLS 1.2 could have been defined to use the sequence number directly for the GCM per-record IV; this would have saved 8 bytes in each record. It would have been fine.
How are records broken in a TLS session?
TLS sessions are broken into the sending and receiving of “records”, which are blocks of data with a type, a protocol version, and a length. Each handshake message starts with a type and a length. The protocol version of “3,3” (TLS 1.2) is given.
What is the unusual version number for TLS 1.0?
The unusual version number (“3,3” representing TLS 1.2) is due to TLS 1.0 being a minor revision of the SSL 3.0 protocol. Therefore TLS 1.0 is represented by “3,1”, TLS 1.1 is “3,2”, and so on. The client provides 32 bytes of random data.