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Cryptography & PKI

SSL

Secure Sockets Layer

The deprecated predecessor to TLS for encrypting connections.

Secure Sockets Layer was the original protocol for encrypting network connections, but all versions are deprecated and insecure due to flaws exploited by attacks such as POODLE. It has been superseded by TLS, although the term SSL persists informally in product names and certificate references. Continued use of SSL or early TLS is a common audit finding. On the exam, treat SSL as obsolete, know that TLS is its successor, and recognize SSL or TLS certificates as the same X.509 trust mechanism.

Related terms

Looking SSL up is step one. Getting tested on it is step two.

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