ISO/IEC 20009-2:2013 specifies anonymous entity authentication mechanisms based on signatures using a group public key in which a verifier verifies a group signature scheme to authenticate the entity with which it is communicating, without knowing this entity's identity. ISO/IEC 20009-2:2013 provides:
- a general description of an anonymous entity authentication mechanism based on signatures using a group public key,
- a variety of mechanisms of this type.
ISO/IEC 20009-2:2013 describes:
- the group membership issuing processes,
- anonymous authentication mechanisms without an online Trusted Third Party (TTP),
- anonymous authentication mechanisms involving an online TTP.
Furthermore, ISO/IEC 20009-2:2013 also specifies:
- the group membership opening process (optional),
- the group signature linking process (optional).