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Revocable Ring Signature

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Abstract

Group signature allows the anonymity of a real signer in a group to be revoked by a trusted party called group manager. It also gives the group manager the absolute power of controlling the formation of the group. Ring signature, on the other hand, does not allow anyone to revoke the signer anonymity, while allowing the real signer to form a group (also known as a ring) arbitrarily without being controlled by any other party. In this paper, we propose a new variant for ring signature, called Revocable Ring Signature. The signature allows a real signer to form a ring arbitrarily while allowing a set of authorities to revoke the anonymity of the real signer. This new variant inherits the desirable properties from both group signature and ring signature in such a way that the real signer will be responsible for what it has signed as the anonymity is revocable by authorities while the real signer still has the freedom on ring formation. We provide a formal security model for revocable ring signature and propose an efficient construction which is proven secure under our security model.

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Authors and Affiliations

  1. Department of Computer Science, City University of Hong Kong, Hong Kong, China

    Dennis Y. W. Liu & Duncan S. Wong

  2. Institute for Infocomm Research (I2R), 21 Heng Mui Keng Terrace, Singapore, 119613, Singapore

    Joseph K. Liu

  3. Centre for Computer and Information Security Research, School of Computer Science and Software Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia

    Yi Mu & Willy Susilo

Authors
  1. Dennis Y. W. Liu
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  2. Joseph K. Liu
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  3. Yi Mu
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  4. Willy Susilo
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  5. Duncan S. Wong
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Corresponding author

Correspondence to Dennis Y. W. Liu.

Additional information

Dennis Y. W. Liu and Duncan S. Wong were supported by CityU grants (Project Nos. 7001844, 7001959, 7002001).

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Liu, D.Y.W., Liu, J.K., Mu, Y. et al. Revocable Ring Signature. J. Comput. Sci. Technol. 22, 785–794 (2007). https://doi.org/10.1007/s11390-007-9096-5

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  • DOI: https://doi.org/10.1007/s11390-007-9096-5

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