Group signatures with verifier-local revocation
Proceedings of the 11th ACM conference on Computer and communications security
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
A Short Verifier-Local Revocation Group Signature Scheme with Backward Unlinkability
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Verifier-Local revocation group signature schemes with backward unlinkability from bilinear maps
ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
Shorter verifier-local revocation group signatures from bilinear maps
CANS'06 Proceedings of the 5th international conference on Cryptology and Network Security
| Hi-index | 0.00 |
In this letter, we improve NF'07 (Nakanishi and Funabiki) VLR group signature scheme such that it satisfies exculpability and has lower computation costs. In the proposed scheme, a group member generates his own private key together with the group manager in order to realize exculpability while the signature size is not made longer. Also, a new revocation check method is proposed at the step of verifying, and the computation costs of verifying are independent of the number of the revoked members, while they are linear with the number of the revoked members in the original scheme. Thus, the proposed scheme is more efficient than the original scheme and can be applicable to mobile environments such as IEEE 802.1x.