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From Rerandomizability to Sequential Aggregation: Efficient Signature Schemes Based on SXDH Assumption

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Information Security and Privacy (ACISP 2020)

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Abstract

An aggregate signature allows one to generate a short aggregate of signatures from different signers on different messages. A sequential aggregate signature (SeqAS) scheme allows the signers to aggregate their individual signatures in a sequential manner. All existing SeqAS schemes that do not use the random oracle assumption either require a large public key or the security depends upon some non-standard interactive/static assumptions. In this paper, we present an efficient SeqAS scheme with constant-size public key under the SXDH assumption. In the process, we first obtain an optimized (and more efficient) variant of Libert et al.’s randomizable signature scheme. While both the schemes are more efficient than the currently best ones that rely on some static assumption, they are only slightly costlier than the most efficient ones based on some interactive assumption.

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Authors and Affiliations

  1. Department of Computer Science and Automation, Indian Institute of Science, Bangalore, India

    Sanjit Chatterjee & R. Kabaleeshwaran

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  1. Sanjit Chatterjee
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  2. R. Kabaleeshwaran
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Correspondence to R. Kabaleeshwaran .

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Editors and Affiliations

  1. Faculty of Information Technology, Monash University, Clayton, VIC, Australia

    Joseph K. Liu

  2. Murdoch University, Perth, WA, Australia

    Hui Cui

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Chatterjee, S., Kabaleeshwaran, R. (2020). From Rerandomizability to Sequential Aggregation: Efficient Signature Schemes Based on SXDH Assumption. In: Liu, J., Cui, H. (eds) Information Security and Privacy. ACISP 2020. Lecture Notes in Computer Science(), vol 12248. Springer, Cham. https://doi.org/10.1007/978-3-030-55304-3_10

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  • DOI: https://doi.org/10.1007/978-3-030-55304-3_10

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  • Online ISBN: 978-3-030-55304-3

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