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Cryptanalysis of a signcryption scheme with fast online signing and short signcryptext

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Abstract

Signcryption is functional combination of encryption and signature, efficiency higher than the separate signing and encrypting. Recently, Youn et al. presented a new signcryption scheme, which has fast online signing and short signcryptext, and is efficient enough for mobile applications. This scheme is claimed to be both existentially unforgeable and semantically secure. However, in this paper we shall show that it is not existentially unforgeable.

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Authors and Affiliations

  1. Department of Computer Science, Jinan University, Guangzhou, 510632, China

    DeHua Zhou & Jian Weng

  2. Department of Computer Science, Shanghai Jiao Tong University, Shanghai, 200240, China

    DeHua Zhou & KeFei Chen

  3. School of Information Systems, Singapore Management University, Singapore, 178902, Singapore

    Jian Weng, ChaoWen Guan & Robert Deng

  4. College of Information Engineering, Shenzhen University, Shenzhen, 518060, China

    MinRong Chen

  5. School of Computer, South China Normal University, Guangzhou, 510631, China

    MinRong Chen

Authors
  1. DeHua Zhou
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  2. Jian Weng
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  3. ChaoWen Guan
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  4. Robert Deng
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  5. MinRong Chen
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  6. KeFei Chen
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Correspondence to Jian Weng.

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Zhou, D., Weng, J., Guan, C. et al. Cryptanalysis of a signcryption scheme with fast online signing and short signcryptext. Sci. China Inf. Sci. 57, 1–5 (2014). https://doi.org/10.1007/s11432-013-4983-6

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  • DOI: https://doi.org/10.1007/s11432-013-4983-6

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