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Paper: Revisiting the Security Model for Timed-Release Public-Key Encryption with Pre-Open Capability

Authors:
Alexander W. Dent
Qiang Tang
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URL: http://eprint.iacr.org/2006/306
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Abstract: In this paper we investigate a security model for Timed-Release Encryption schemes with Pre-Open Capability (TRE-PC schemes) proposed by Hwang, Yum, and Lee. Firstly, we show that the HYL model possesses a number of defects and fails to model some potentially practical security vulnerabilities faced by TRE-PC schemes. Secondly, we propose a new security model for TRE-PC schemes which models the securities against four kinds of attacker and avoids the defects of the HYL model. We also work out the complete relations among the security notions defined in the new model. Thirdly, we introduce the notion of TRE-PC-KEM, which is a special type of KEM, and show a way to construct a TRE-PC scheme using a TRE-PC-KEM and a DEM. Finally, we propose an instantiation of a TRE-PC-KEM and prove its security.
BibTeX
@misc{eprint-2006-21797,
  title={Revisiting the Security Model for Timed-Release Public-Key Encryption with Pre-Open Capability},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / Encryption, Timed-release encryption},
  url={http://eprint.iacr.org/2006/306},
  note={Summary of results accepted for publication in ISC 2007 a.dent@rhul.ac.uk 13692 received 6 Sep 2006, last revised 28 Jun 2007},
  author={Alexander W. Dent and Qiang Tang},
  year=2006
}