Security requirements | [12] | [13] | Proposed scheme |
Anonymity | Yes | Yes | Yes |
Unforgeability | Yes | Yes | Yes |
Strong/weak unlinkability | Weak unlinkability | Weak unlinkability | Strong unlinkability |
Nontransferability | No | No | Yes |
Exculpability | Yes | Yes | No |
Dynamic membership | Yes | No | Yes |
Traitor detection | No | No | Yes |