Computerized patient information system in a psychiatric unit: five-year experience
Journal of Medical Systems
Divertible Zero-Knowledge Proof of Polynominal Relations and Blind Group Signature
ACISP '99 Proceedings of the 4th Australasian Conference on Information Security and Privacy
Security of Blind Discrete Log Signatures against Interactive Attacks
ICICS '01 Proceedings of the Third International Conference on Information and Communications Security
A Generalized Birthday Problem
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Threshold Ring Signatures and Applications to Ad-hoc Groups
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Dynamic Accumulators and Application to Efficient Revocation of Anonymous Credentials
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
ID-Based Blind Signature and Ring Signature from Pairings
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
1-out-of-n Signatures from a Variety of Keys
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
A Practical and Provably Secure Coalition-Resistant Group Signature Scheme
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
Group Blind Digital Signatures: A Scalable Solution to Electronic Cash
FC '98 Proceedings of the Second International Conference on Financial Cryptography
Lower bounds for discrete logarithms and related problems
EUROCRYPT'97 Proceedings of the 16th 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
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
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
Efficient blind signatures without random oracles
SCN'04 Proceedings of the 4th international conference on Security in Communication Networks
Blind spontaneous anonymous group signatures for ad hoc groups
ESAS'04 Proceedings of the First European conference on Security in Ad-hoc and Sensor Networks
Blind ring signatures secure under the chosen-target-CDH assumption
ISC'06 Proceedings of the 9th international conference on Information Security
Escrowed linkability of ring signatures and its applications
VIETCRYPT'06 Proceedings of the First international conference on Cryptology in Vietnam
Short linkable ring signatures revisited
EuroPKI 2006 Proceedings of the Third European conference on Public Key Infrastructure: theory and Practice
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Blind group/ring signatures are useful for applications such as e-cash and e-voting systems. In this paper, we show that the blindness of some existing blind group/ring signature schemes is easy to break by a malicious anonymous signer of dynamic groups. However, this risk has not been pointed out in these proposals, which may cause misuse of the schemes. Fortunately, for static groups, it is possible to integrate the blindness of message into group/ring signatures. An efficient static blind ring signature is proposed with its security provable under the extended ROS assumptions in the random oracle model plus the generic group model. After the group public key is generated, the space, time, and communication complexities of the relevant parameters and operations are constant.