SSL (secure socket layer) is a protocol designed to protect online information over the web. Encryption technology works on public key infrastructure (public and private key). SSLv3.0 was in practice but deprecated in 2015 due to vulnerability, and TLS was introduced. TLS1.0, TLS1.1, TLS1.2, and TLS1.3 versions have been in practice. The current version is TLS1.3 which was published in 2018.

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