quinta-feira, 21 de fevereiro de 2013

What's the difference between SSL, TLS, and HTTPS?


What's the difference between SSL, TLS, and HTTPS?

TLS is the new name for SSL. Namely, SSL protocol got to version 3.0; TLS 1.0 is "SSL 3.1". TLS versions currently defined include TLS 1.1 and 1.2. Each new version adds a few features and modifies some internal details. We sometimes say "SSL/TLS".

HTTPS is HTTP-within-SSL/TLS. SSL (TLS) establishes a secured bidirectional tunnel for arbitrary binary data between two hosts. HTTP is a protocol for sending requests and receiving answers, each request and answer consisting in detailed headers and (possibly) some content. HTTP is meant to run over a bidirectional tunnel for arbitrary binary data; when that tunnel is a SSL/TLS connection, then the whole is called "HTTPS".

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