Public-key cryptosystems provably secure against chosen ciphertext attacks
STOC '90 Proceedings of the twenty-second annual ACM symposium on Theory of computing
Group signatures with verifier-local revocation
Proceedings of the 11th ACM conference on Computer and communications security
Short Signatures Without Random Oracles and the SDH Assumption in Bilinear Groups
Journal of Cryptology
Pairing '08 Proceedings of the 2nd international conference on Pairing-Based Cryptography
Efficient Traceable Signatures in the Standard Model
Pairing '09 Proceedings of the 3rd International Conference Palo Alto on Pairing-Based Cryptography
Selected Areas in 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
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
Fully anonymous group signatures without random oracles
ASIACRYPT'07 Proceedings of the Advances in Crypotology 13th international conference on Theory and application of cryptology and information security
Efficient non-interactive proof systems for bilinear groups
EUROCRYPT'08 Proceedings of the theory and applications of cryptographic techniques 27th annual international conference on Advances in cryptology
Structure-preserving signatures and commitments to group elements
CRYPTO'10 Proceedings of the 30th annual conference on Advances in cryptology
An efficient convertible undeniable signature scheme with delegatable verification
ISPEC'10 Proceedings of the 6th international conference on Information Security Practice and Experience
Separating short structure-preserving signatures from non-interactive assumptions
ASIACRYPT'11 Proceedings of the 17th international conference on The Theory and Application of Cryptology and Information Security
Multi-show anonymous credentials with encrypted attributes in the standard model
CANS'11 Proceedings of the 10th international conference on Cryptology and Network Security
SPICE: simple privacy-preserving identity-management for cloud environment
ACNS'12 Proceedings of the 10th international conference on Applied Cryptography and Network Security
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This paper introduces a novel tool, public-key anonymous tag system, which is useful in building controlled privacy-protecting protocols. The double-trapdoor structure of the system not only allows the authority to create a token which can trace someone's tags without violating anonymity of the tag-issuer, but also allows the issuer to claim or deny the authorship of a tag in the stateless manner. An efficient instantiation based on simple assumptions in the standard model is presented. We then use it for a modular construction of traceable signatures. Our scheme supports a signature authorship claiming (and denial) that binds a claim to the public-key of the signer unlike that in known schemes. It is also the first scheme in the literature which features concurrent joining of users, stronger anonymity and so on without random oracles.