Demonstrating possession of a discrete logarithm without revealing it
Proceedings on Advances in cryptology---CRYPTO '86
CRYPTO '89 Proceedings of the 9th Annual International Cryptology Conference on Advances in Cryptology
A practical scheme for non-interactive verifiable secret sharing
SFCS '87 Proceedings of the 28th Annual Symposium on Foundations of Computer Science
Designated verifier proofs and their applications
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
An improved protocol for demonstrating possession of discrete logarithms and some generalizations
EUROCRYPT'87 Proceedings of the 6th annual international conference on Theory and application of cryptographic techniques
ISC'07 Proceedings of the 10th international conference on Information Security
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Many attempts to controlling who and under which circumstances can verify our signatures have been made so far. For this purpose one can use undeniable signatures, designated confirmer signatures or designated verifier signatures. We introduce a model of new kind of signatures, called dedicated digital signatures (or dds for short). The core idea is that a designated verifier can present a standard signature of the signer derived from dds to a third party, but at the price of revealing the private key of the designated verifier or at the price of revealing the designated verifier’s signature of a particular message. Therefore the verifier will show the signature only in very special situations. We present a construction of a dds based on ElGamal signatures and its modifications that allow to obtain additional important features.