Separability and Efficiency for Generic Group Signature Schemes
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st 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
A Group Signature Scheme with Improved Efficiency
ASIACRYPT '98 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Short Signatures from the Weil Pairing
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Some Open Issues and New Directions in Group Signatures
FC '99 Proceedings of the Third International Conference on Financial Cryptography
PKC '03 Proceedings of the 6th International Workshop on Theory and Practice in Public Key Cryptography: Public Key Cryptography
A Practical and Provably Secure Coalition-Resistant Group Signature Scheme
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
Leak-Free Group Signatures with Immediate Revocation
ICDCS '04 Proceedings of the 24th International Conference on Distributed Computing Systems (ICDCS'04)
A method for fast revocation of public key certificates and security capabilities
SSYM'01 Proceedings of the 10th conference on USENIX Security Symposium - Volume 10
Robust threshold DSS signatures
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
Efficient and generalized group signatures
EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Foundations of group signatures: the case of dynamic groups
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
Cryptanalysis of two signature schemes based on bilinear pairings in CISC '05
Inscrypt'06 Proceedings of the Second SKLOIS conference on Information Security and Cryptology
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This paper presents two types of group signature schemes from bilinear pairings: the mini type and the improved type. The size of the group public keys and the length of the signatures in both schemes are constant. An on-line third party is introduced to help the schemes to realize the “join” of group members, the “opening” of group signatures, and the immediate “revocation” of group membership. It is shown that the introduction of this party makes our schemes much more simple and efficient than the previous schemes of this kind. The mini group signature is in fact only a BLS short signature. Unfortunately, it has a drawback of key escrow. A dishonest group manager can forge any group signature at his will. To avoid this drawback, we put forward an improved scheme, which is also very simple and efficient, and satisfies all the security requirements of a group signature scheme.