Practical forward secure group signature schemes
CCS '01 Proceedings of the 8th ACM conference on Computer and Communications Security
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
Some Open Issues and New Directions in Group Signatures
FC '99 Proceedings of the Third International Conference on Financial 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
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
Interpolation of the Double Discrete Logarithm
WAIFI '08 Proceedings of the 2nd international workshop on Arithmetic of Finite Fields
| Hi-index | 0.00 |
In resent years, Popescu et al. proposed several group signature schemes in [8, 9, 10, 11] that based on the Okamoto-Shiraishi assumption. Their schemes are claimed to be secure. However, we identify several security flaws in their schemes and then show that these schemes are all insecure. By exploiting those flaws, anybody (not necessarily a group member) can forge valid group signatures on arbitrary messages of his/her choice. In other words, these schemes are universally forgeable.