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Short Convertible Undeniable Signature in the Standard Model

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Information Security Practice and Experience (ISPEC 2011)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 6672))

Abstract

A convertible undeniable signature allows a signer to confirm or disavow a non-self-authenticating signature and also convert a valid one to a publicly verifiable signature. During the conversion, existing schemes either require the signer to be stateful, or have their security based on the random oracle assumption, or result in getting a large converter. In this work we propose a new construction, which supports both selective and universal conversion, and is provably secure without random oracles. It has the shortest undeniable signature and the smallest converter. A signature consists of three bilinear group elements and just one group element each in a selective converter and a universal converter. The scheme can be extended further to support new features, such as the delegation of conversion and confirmation/disavowal, threshold conversion and others.

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Author information

Authors and Affiliations

  1. South China Agricultural University, Guangzhou, China

    Qiong Huang

  2. City University of Hong Kong, Hong Kong S.A.R., China

    Qiong Huang & Duncan S. Wong

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  1. Qiong Huang
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  2. Duncan S. Wong
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Editors and Affiliations

  1. Institute for Infocomm Research, 1 Fusionopolis Way, # 19-01 Connexis (South Tower), 138632, Singapore, Singapore

    Feng Bao

  2. Jinan University, Huangpu Avenue West 602, 510632, Tianhe District, Guangzhou, China

    Jian Weng

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Huang, Q., Wong, D.S. (2011). Short Convertible Undeniable Signature in the Standard Model. In: Bao, F., Weng, J. (eds) Information Security Practice and Experience. ISPEC 2011. Lecture Notes in Computer Science, vol 6672. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21031-0_20

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  • DOI: https://doi.org/10.1007/978-3-642-21031-0_20

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-21030-3

  • Online ISBN: 978-3-642-21031-0

  • eBook Packages: Computer ScienceComputer Science (R0)

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