What is ISO/IEC 27551 about ?
ISO/IEC 27551 provides a framework and establishes requirements for attribute-based unlinkable entity authentication (ABUEA).
Attribute-based unlinkable entity authentication (ABUEA) provides a means for PII principals to establish the authenticity of a selected subset of their identity attributes without revealing a larger subset. Special focus is put on unlinkability and a metric that measures the strength of this property in implementations of ABUEA is introduced.
ISO/IEC 27551 focuses on cases where at least one attribute is attested by a third party. ISO/IEC 27551