GPBFT: A Practical Byzantine Fault-Tolerant Consensus Algorithm Based on Dual Administrator Short Group Signatures
Table 1
Short group signatures security standards.
Security standards
Explanation
Correctness
Legal group members’ signature is properly verified and that the group signature can be traced back to the original signer
Unforgeability
A legal group signature can only be generated by members who have obtained a group membership certificate and a signing key
Anonymity
The user who receives the signature can only verify the signature’s legality, not the identity of the group member who generated it, or even the identity of the other members in the group
Traceability
Only the administrator can open a signature and find the identity of a signed group member
Unlinkability
It is computationally impossible to determine whether two signatures are signed by the same group member for unopened signatures
Irreplaceability
No member of the group can generate a signature on behalf of other users
Anti-joint attack
Even if some group members are federated, they cannot produce a valid group signature that can be tracked by the group administrator
