IA-2(9): Network Access To Non-Privileged Accounts – Replay Resistant

CSF v1.1 References:

Threats Addressed:


  • High
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Control is withdrawn in the next version of this control set and incorporated into: IA-2(8): Access to Accounts – Replay Resistant.

Control Statement

The information system implements replay-resistant authentication mechanisms for network access to non-privileged accounts.

Supplemental Guidance

Authentication processes resist replay attacks if it is impractical to achieve successful authentications by recording/replaying previous authentication messages. Replay-resistant techniques include, for example, protocols that use nonces or challenges such as Transport Layer Security (TLS) and time synchronous or challenge-response one-time authenticators.