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Security Analysis of the Unrestricted Identity-Based Aggregate Signature Scheme

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  • Kwangsu Lee
  • Dong Hoon Lee

Abstract

Aggregate signatures allow anyone to combine different signatures signed by different signers on different messages into a short signature. An ideal aggregate signature scheme is an identity-based aggregate signature (IBAS) scheme that supports full aggregation since it can reduce the total transmitted data by using an identity string as a public key and anyone can freely aggregate different signatures. Constructing a secure IBAS scheme that supports full aggregation in bilinear maps is an important open problem. Recently, Yuan et al. proposed such a scheme and claimed its security in the random oracle model under the computational Diffie-Hellman assumption. In this paper, we show that there is an efficient forgery on their IBAS scheme and that their security proof has a serious flaw.

Suggested Citation

  • Kwangsu Lee & Dong Hoon Lee, 2015. "Security Analysis of the Unrestricted Identity-Based Aggregate Signature Scheme," PLOS ONE, Public Library of Science, vol. 10(5), pages 1-8, May.
  • Handle: RePEc:plo:pone00:0128081
    DOI: 10.1371/journal.pone.0128081
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    References listed on IDEAS

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    1. Anonymous, 2013. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 107(4), pages 1-1, November.
    2. Anonymous, 2012. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 106(2), pages 1-1, May.
    3. Anonymous, 2013. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 107(3), pages 1-1, August.
    4. Anonymous, 2012. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 106(1), pages 1-1, February.
    5. Anonymous, 2012. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 106(4), pages 1-1, November.
    6. Anonymous, 2013. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 107(2), pages 1-1, May.
    7. Anonymous, 2013. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 107(1), pages 1-1, February.
    8. Anonymous, 2012. "Notes from the Editors," American Political Science Review, Cambridge University Press, vol. 106(3), pages 1-1, August.
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