3.5.2 Authentication

The key exchange algorithms of the TLS protocol offer authentication, which is a prerequisite for a secure connection. The available authentication methods in GnuTLS follow.

• Certificate authentication: Authenticated key exchange using public key infrastructure and certificates (X.509 or OpenPGP).
• SRP authentication: Authenticated key exchange using a password.
• PSK authentication: Authenticated key exchange using a pre-shared key.
• Anonymous authentication: Key exchange without peer authentication.