ISO 18370-1:2016 specifies principles, including a general model, a set of entities, a number of processes, and general requirements for blind digital signature mechanisms, as well as the following variants of blind digital signature mechanisms: - blind signature mechanisms with partial disclosure; - blind signature mechanisms with selective disclosure; - traceable blind signature mechanisms. It also contains terms, definitions, abbreviated terms and figure elements that are used in all parts of ISO/IEC 18370. See Annex A for a comparison on the blind digital signature mechanisms.