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AC-07(04) Use of Alternate Authentication Factor

NIST SP 800-53 (controls) 5.2.0 against 5.2.0
All changes in this version
unchanged AC part of AC-7

Title

Use of Alternate Authentication Factor

Control

(a) Allow the use of [Assignment: authentication factors] that are different from the primary authentication factors after the number of organization-defined consecutive invalid logon attempts have been exceeded; and
(b) Enforce a limit of [Assignment: number] consecutive invalid logon attempts through use of the alternative factors by a user during a [Assignment: time period].

Discussion

The use of alternate authentication factors supports the objective of availability and allows a user who has inadvertently been locked out to use additional authentication factors to bypass the lockout.

Parameters

ac-07.04_odp.01: authentication factors
ac-07.04_odp.02: number
ac-07.04_odp.03: time period

Related controls

ia-3

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).