Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

6-2007

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.

Keywords

Time Capsule Signature

Discipline

Information Security

Research Areas

Information Systems and Management

Publication

Public Key Infrastructure: 4th European PKI Workshop: Theory and Practice, Palma de Mallorca, Spain, June 28-30: Proceedings

Volume

4582

First Page

127

Last Page

142

ISBN

9783540734079

Identifier

10.1007/978-3-540-73408-6_9

Publisher

Springer

City or Country

Cham

Additional URL

https://doi.org/10.1007/978-3-540-73408-6_9

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