Wednesday, January 17, 2018

Netiquette IQ Blog Of 1/17.18 Transport Layer Security (TLS)



from whatis.com
Transport Layer Security (TLS)
Transport Layer Security (TLS) is a protocol that provides privacy and data integrity between two communicating applications. It's the most widely deployed security protocol used today, and is used for Web browsers and other applications that require data to be securely exchanged over a network, such as file transfers, VPN connections, instant messaging and voice over IP.
TLS evolved from Netscape's Secure Sockets Layer (SSL) protocol and has largely superseded it, although the terms SSL or SSL/TLS are still sometimes used. Key differences between SSL and TLS that make TLS a more secure and efficient protocol are message authentication, key material generation and the supported cipher suites, with TLS supporting newer and more secure algorithms. TLS and SSL are not interoperable, though TLS currently provides some backward compatibility in order to work with legacy systems.
According to the protocol specification, TLS is composed of two layers: the TLS Record Protocol and the TLS Handshake Protocol. The Record Protocol provides connection security, while the Handshake Protocol allows the server and client to authenticate each other and to negotiate encryption algorithms and cryptographic keys before any data is exchanged.
The IETF officially took over the SSL protocol to standardize it with an open process and released version 3.1 of SSL in 1999 as TLS 1.0. The protocol was renamed TLS to avoid legal issues with Netscape, which developed the SSL protocol as a key feature part of its original Web browser. The last update for the TLS protocol (TLS 1.2) was issued in 2008. Since that time, the specification has undergone several changes as new issues with the protocol have been discovered.
A draft for TLS 1.3 was issued in 2014 and the new version of the protocol, which is expected to be finalized in 2018, is expected to add several features that will help improve security, including support for Perfect Forward Secrecy and the pruning of obsolete and insecure algorithms. TLS 1.3 is also expected to speed up performance by simplifying the handshake process for encrypted connections.
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