Paper 2006/113

A New Construction of Time Capsule Signature

Miaomiao Zhang, Gongliang Chen, Jianhua Li, Licheng Wang, and Haifeng Qian


In this paper we introduce a new approach of constructing time capsule signature. Our new construction captures the basic requirements defined by dodis \emph{et al.}, and it is also very straightforward and flexible. The time capsule signature provides an elegant way to produce a ``future signature" that becomes valid from a specific future time $t$, when a trusted third party (called \textit{Time Server}) publishes some trapdoor information associated with the time $t$. It also has many other advantages. Our work includes a developed security model of time capsule signature, a novel way of construction based on the bipartite ring signature, which is proven secure in the random oracle model and a concrete realization of the scheme.

Available format(s)
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
digital signaturetime capsulering signatureprovable security
Contact author(s)
mmzhang_sjtu @ sjtu edu cn
2006-04-01: revised
2006-03-26: received
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Creative Commons Attribution


      author = {Miaomiao Zhang and Gongliang Chen and Jianhua Li and Licheng Wang and Haifeng Qian},
      title = {A New Construction of Time Capsule Signature},
      howpublished = {Cryptology ePrint Archive, Paper 2006/113},
      year = {2006},
      note = {\url{}},
      url = {}
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