AU-4

AU-4 AUDIT STORAGE CAPACITY

Overview

Number	Title	Impact	Priority	Subject Area
AU-4	Audit Storage Capacity	LOW	P1	Audit And Accountability

Instructions
The organization allocates audit record storage capacity in accordance with Assignment: organization-defined audit record storage requirements.

Guidance
Organizations consider the types of auditing to be performed and the audit processing requirements when allocating audit storage capacity. Allocating sufficient audit storage capacity reduces the likelihood of such capacity being exceeded and resulting in the potential loss or reduction of auditing capability.

Enhancements

AU-4 (1) Transfer To Alternate Storage

Off-loading is a process designed to preserve the confidentiality and integrity of audit records by moving the records from the primary information system to a secondary or alternate system. It is a common process in information systems with limited audit storage capacity; the audit storage is used only in a transitory fashion until the system can communicate with the secondary or alternate system designated for storing the audit records, at which point the information is transferred.

The information system off-loads audit records Assignment: organization-defined frequency onto a different system or media than the system being audited.