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Time capsule signature: Efficient and provably secure constructions

Conference Paper


Abstract


  • Time Capsule Signature, first formalized by Dodis and Yum in Financial Cryptography 2005, is a digital signature scheme which allows a signature to bear a (future) time t so that the signature will only be valid at time t or later, when a trusted third party called time server releases time-dependent information for checking the validity of a time capsule signature. Also, the actual signer of a time capsule signature has the privilege to make the signature valid before time t. In this paper, we provide a new security model of time capsule signature such that time server is not required to be fully trusted. Moreover, we provide two efficient constructions in random oracle model and standard model. Our improved security model and proven secure constructions have the potential to build some new E-Commerce applications. © Springer-Verlag Berlin Heidelberg 2007.

Publication Date


  • 2007

Citation


  • Hu, B. C., Wong, D. S., Huang, Q., Yang, G., & Deng, X. (2007). Time capsule signature: Efficient and provably secure constructions. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Vol. 4582 LNCS (pp. 126-142). doi:10.1007/978-3-540-73408-6_9

Scopus Eid


  • 2-s2.0-38049033468

Start Page


  • 126

End Page


  • 142

Volume


  • 4582 LNCS

Abstract


  • Time Capsule Signature, first formalized by Dodis and Yum in Financial Cryptography 2005, is a digital signature scheme which allows a signature to bear a (future) time t so that the signature will only be valid at time t or later, when a trusted third party called time server releases time-dependent information for checking the validity of a time capsule signature. Also, the actual signer of a time capsule signature has the privilege to make the signature valid before time t. In this paper, we provide a new security model of time capsule signature such that time server is not required to be fully trusted. Moreover, we provide two efficient constructions in random oracle model and standard model. Our improved security model and proven secure constructions have the potential to build some new E-Commerce applications. © Springer-Verlag Berlin Heidelberg 2007.

Publication Date


  • 2007

Citation


  • Hu, B. C., Wong, D. S., Huang, Q., Yang, G., & Deng, X. (2007). Time capsule signature: Efficient and provably secure constructions. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Vol. 4582 LNCS (pp. 126-142). doi:10.1007/978-3-540-73408-6_9

Scopus Eid


  • 2-s2.0-38049033468

Start Page


  • 126

End Page


  • 142

Volume


  • 4582 LNCS