公开(公告)号：US11750404B2

公开(公告)日：2023-09-05

申请号：US17088998

申请日：2020-11-04

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hwan Jo Heo ,  Hyun Jin Lee

IPC: H04L9/32 ,  H04L9/08

CPC classification number: H04L9/3255 ,  H04L9/0825 ,  H04L9/0838 ,  H04L9/0891 ,  H04L9/3257

Abstract: A decentralized group signature method for an issuer-anonymized credential system includes (a) an initial system setup operation of defining elements of a group signature method and information that is generated and shared by each group member, (b) an initial group member setup operation, (c) a group member participation operation of adding a new group member to a group, (d) a group signature operation of putting a group signature on a specific message, (e) an operation of verifying the group signature, (f) an operation of removing anonymity from a group signature for a specific group member with agreement of group members, and (g) an operation of revoking a specific group member with agreement of the group members. Exclusive authority of a group manager is distributed to the group members.