CISA Certified Information Systems Auditor – Question2835

The purpose of a checksum on an amount field in an electronic data interchange (EDI) communication of financial transactions is to ensure:

A. integrity.
B. authenticity.
C. authorization.
D. nonrepudiation.

Correct Answer: A

Explanation:

Explanation:
A checksum calculated on an amount field and included in the EDI communication can be used to identify unauthorized modifications. Authenticity and authorization cannot be established by a checksum alone and need other controls. Nonrepudiation can be ensured by using digital signatures.