A digital signature scheme secure against adaptive chosen-message attacks
SIAM Journal on Computing - Special issue on cryptography
Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Threshold Ring Signatures and Applications to Ad-hoc Groups
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Proofs of Partial Knowledge and Simplified Design of Witness Hiding Protocols
CRYPTO '94 Proceedings of the 14th 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
On Concrete Security Treatment of Signatures Derived from Identification
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on 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
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
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
Aggregate and verifiably encrypted signatures from bilinear maps
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Certificateless Threshold Ring Signature
Information Sciences: an International Journal
Universal Designated Verifier Signatures with Threshold-Signers
IWSEC '09 Proceedings of the 4th International Workshop on Security: Advances in Information and Computer Security
Certificate based (linkable) ring signature
ISPEC'07 Proceedings of the 3rd international conference on Information security practice and experience
A provably secure ring signature scheme in certificateless cryptography
ProvSec'07 Proceedings of the 1st international conference on Provable security
A suite of non-pairing ID-based threshold ring signature schemes with different levels of anonymity
ProvSec'10 Proceedings of the 4th international conference on Provable security
Constant-size ID-based linkable and revocable-iff-linked ring signature
INDOCRYPT'06 Proceedings of the 7th international conference on Cryptology in India
Identity based ring signature: why, how and what next
EuroPKI'05 Proceedings of the Second European conference on Public Key Infrastructure
Identity based threshold ring signature
ICISC'04 Proceedings of the 7th international conference on Information Security and Cryptology
Online/Offline ring signature scheme
ICICS'09 Proceedings of the 11th international conference on Information and Communications Security
ICICS'09 Proceedings of the 11th international conference on Information and Communications Security
| Hi-index | 0.00 |
We make fine-grained distinctions on the security models for provably secure ring signature schemes. Currently there are two commonly used security models which are specified by Rivest et al. [1] and Abe et al. [1]. They offer different levels of security. In this paper, we introduce a new but compatible model whose security level can be considered to be lying in between these two commonly used models. It is important to make fine-grained distinctions on the security models because some schemes may be secure in some of the models but not in the others. In particular, we show that the bilinear map based ring signature scheme of Boneh et al. [4], which have been proven secure in the weakest model (the one specified by Rivest et al. [15]), is actually insecure in stronger models (the new model specified by us in this paper and the one specified by Abe et al. [1]). We also propose a secure modification of their scheme for each of the two stronger models. In addition, we propose a threshold ring signature scheme using bilinear maps and show its security against adaptive adversaries in the strongest model defined in this paper. Throughout the paper, we carry out all of the security analyses under the random oracle assumption.