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SSL (Secure Sockets Layer)

Encryption

Legacy transport security protocol family.

Definition

SSL refers to legacy versions of transport security (SSLv2/SSLv3) that are obsolete and insecure; modern systems use TLS 1.2/1.3 instead.

In plain English Legacy transport security protocol family.

Why this matters

Why it matters: Misconfigured or legacy protocol support expands attack surface.

Example

Example: Disabling SSLv3 and requiring TLS 1.2+ on servers.