AC-7(2)

Requirement

Purge or wipe information from [Assignment: organization-defined mobile devices] based on [Assignment: organization-defined purging or wiping requirements and techniques] after [Assignment: organization-defined number] consecutive, unsuccessful device logon attempts.

Discussion

A mobile device is a computing device that has a small form factor such that it can be carried by a single individual; is designed to operate without a physical connection; possesses local, non-removable or removable data storage; and includes a self-contained power source. Purging or wiping the device applies only to mobile devices for which the organization-defined number of unsuccessful logons occurs. The logon is to the mobile device, not to any one account on the device. Successful logons to accounts on mobile devices reset the unsuccessful logon count to zero. Purging or wiping may be unnecessary if the information on the device is protected with sufficiently strong encryption mechanisms.

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: Access control policy; procedures addressing unsuccessful logon attempts on mobile devices; system design documentation; system configuration settings and associated documentation; list of mobile devices to be purged/wiped after organization-defined consecutive, unsuccessful device logon attempts; list of purging/wiping requirements or techniques for mobile devices; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security responsibilities].

Test

[SELECT FROM: Mechanisms implementing access control policy for unsuccessful device logon attempts].

ID	Assessment Objectives
AC-07(02)	information is purged or wiped from <AC-07(02)_ODP[01] mobile devices> based on <AC-07(02)_ODP[02] purging or wiping requirements or techniques> after <AC-07(02)_ODP[03] number> consecutive, unsuccessful device logon attempts.

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