Secure group communications using key graphs
IEEE/ACM Transactions on Networking (TON)
Practical forward secure group signature schemes
CCS '01 Proceedings of the 8th ACM conference on Computer and Communications Security
An Online Public Auction Protocol Protecting Bidder Privacy
ACISP '00 Proceedings of the 5th Australasian Conference on Information Security and Privacy
Statistical Zero Knowledge Protocols to Prove Modular Polynomial Relations
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Efficient Group Signature Schemes for Large Groups (Extended Abstract)
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Collision-free accumulators and fail-stop signature schemes without trees
EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
Quasi-efficient revocation of group signatures
FC'02 Proceedings of the 6th international conference on Financial cryptography
Group signatures are suitable for constrained devices
ICISC'10 Proceedings of the 13th international conference on Information security and cryptology
Low-Cost cryptography for privacy in RFID systems
CARDIS'06 Proceedings of the 7th IFIP WG 8.8/11.2 international conference on Smart Card Research and Advanced Applications
Off-Line group signatures with smart cards
CARDIS'06 Proceedings of the 7th IFIP WG 8.8/11.2 international conference on Smart Card Research and Advanced Applications
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Group signature schemes allow a group member to sign messages on behalf of the group. Such signatures must be anonymous and unlinkable but, whenever needed, a designated group manager can reveal the identity of the signer. During the last decade group signatures have been playing an important role in cryptographic research; many solutions have been proposed and some of them are quite efficient, with constant size of signatures and keys ([1], [6], [7] and [15]). However, some problems still remain among which the large number of computations during the signature protocol and the difficulty to achieve coalition-resistance and to deal with member revocation. In this paper we investigate the use of a tamper-resistant device (typically a smart card) to efficiently solve those problems.