AC-7(4): Use of Alternate Authentication Factor

Control Family:

Access Control

Threats Addressed:


(Not part of any baseline)

Info icon.

Control is new to this version of the control set.

Control Statement

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

Supplemental Guidance

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.