IT Baseline Protection Manual - The Information Warfare Site

Safeguard Catalogue - Communications Remarks
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S 5.28 Acknowledging correct fax origin via
telephone
Initiation responsibility: IT Security Management, Superiors
Implementation responsibility: Fax receiver
Consideration must be given as to whether the source of important or
extraordinary fax messages should be confirmed by the sender to preclude
forgeries by third parties. This acknowledgement can be provided easily via
telephone. The relevant subscriber number should generally be documented on
the fax cover sheet. It should, however, be verified as it could be forged.
Additional controls:
- Is the sender requested for confirmation via telephone in the case of
important or unusual fax messages?
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IT-Baseline Protection Manual: Oktober 2000