ISO/IEC 9797-2:2021 provides a focused technical reference for message authentication codes using a dedicated hash-function, supporting evaluation of data integrity and authenticity in security-sensitive systems. As a derived document connected to ISO/IEC 9797, it is relevant when teams need a dependable compliance reference for technical review, verification activities, and documented evaluation of cryptographic message protection. ISO/IEC 9797-2:2021 is often used alongside engineering documentation and procurement checks where consistent authentication behavior matters.

Purpose of ISO/IEC 9797-2:2021

The purpose of ISO/IEC 9797-2:2021 is to define mechanisms for generating message authentication codes with a dedicated hash-function, helping organizations assess how protected messages can be validated within a controlled technical framework. It supports engineering specification review, technical validation, and conformity assessment preparation where message integrity and authentication are part of the compliance workflow. In practice, the document helps clarify a structured basis for comparing implementations and documenting security-related design choices.

Compliance applications of ISO/IEC 9797-2:2021

ISO/IEC 9797-2:2021 may be used in product evaluation, laboratory evaluation, and risk management activities for systems that rely on authenticated data exchange. It is relevant to teams reviewing security functions in hardware, software, or integrated equipment where a message authentication code mechanism must be assessed against documented requirements. The document can also support technical assessment during supplier review, internal quality workflows, and regulatory preparation when cryptographic behavior needs to be captured consistently.

Benefits of ISO/IEC 9797-2:2021

Using ISO/IEC 9797-2:2021 can improve testing consistency and reduce ambiguity in how authentication mechanisms are specified and reviewed. For organizations performing technical validation, it offers a clearer basis for conformity assessment and quality assurance across development, procurement, and verification workflows. It may also help align engineering documentation with compliance expectations, supporting repeatable evaluation of message protection functions and lowering the risk of mismatched implementation assumptions during audit or certification preparation.

• Supports structured review of message authentication code mechanisms based on a dedicated hash-function
• Useful for documenting security requirements in engineering and compliance workflows
• Helps laboratories and assessors compare implementations against a defined technical reference
• Can assist procurement and supplier evaluation where authenticated data handling is a requirement