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Chameleon Hashes Without Key Exposure Based on Factoring

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Abstract

Chameleon hash is the main primitive to construct a chameleon signature scheme which provides non-repudiation and non-transferability simultaneously. However, the initial chameleon hash schemes suffer from the key exposure problem: non-transferability is based on an unsound assumption that the designated receiver is willing to abuse his private key regardless of its exposure. Recently, several key-exposure-free chameleon hashes have been constructed based on RSA assumption and SDH (strong Diffie-Hellman) assumption. In this paper, we propose a factoring-based chameleon hash scheme which is proven to enjoy all advantages of the previous schemes. In order to support it, we propose a variant Rabin signature scheme which is proven secure against a new type of attack in the random oracle model.

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Authors and Affiliations

  1. School of Mathematics and Econometrics, Hunan University, Changsha, 410082, China

    Wei Gao

  2. School of Mathematics Science, South China Normal University, Guangzhou, 510631, China

    Xue-Li Wang

  3. School of Computer and Communication, Hunan University, Changsha, 410082, China

    Dong-Qing Xie

Authors
  1. Wei Gao
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  2. Xue-Li Wang
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  3. Dong-Qing Xie
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Corresponding author

Correspondence to Wei Gao.

Additional information

This work is partially supported by the National Natural Science Foundation of China under Grants No. 10271042 and No. 60373085.

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Gao, W., Wang, XL. & Xie, DQ. Chameleon Hashes Without Key Exposure Based on Factoring. J Comput Sci Technol 22, 109–113 (2007). https://doi.org/10.1007/s11390-007-9015-9

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  • DOI: https://doi.org/10.1007/s11390-007-9015-9

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