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Transport Layer Security (TLS), and its now-deprecated predecessor Secure Sockets Layer (SSL), isa cryptographic protocol that provides communications security over a computer network.Several versions of the protocols are widely used in applications such as email, instant messaging, and voice over IP, but its use as the Security layer in HTTPS remains the most publicly visible.
It was created from the TLS Record Protocol, which provides connection security, and the TLS Handshake Protocol, which authenticates both server and client before data is exchanged.
Transport Layer Security has superseded Secure Sockets Layer (SSL), as it is a more secure and efficient cryptographic protocol for securing privacy and data integrity throughout a computer network. Unlike SSL, TLS has key material generation, supported cipher suits, and message authentication. TLS also supports newer and more secure algorithms.