Abstract
Linkable ring signature schemes are cryptographic primitives which have important applications in e-voting and e-cash. They are ring signature schemes with the extra property that, if the same user signs two messages, a verifier knows they were signed by the same user. In this work, we present a new linkable ring signature scheme. The security of our proposal is based on the hardness of the syndrome decoding problem. To construct it, we use a variant of Stern’s protocol and apply the Fiat-Shamir transform to it. We prove that the scheme has the usual properties for a linkable ring signature scheme: unforgeability, signer anonymity, non-slanderability and linkability.
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Acknowledgments
The authors acknowledge the anonymous referees that contributed to the readability and improvement of the final manuscript. The first author thanks the support from DP-PMI and FCT (Portugal) through the grant PD/BD/135181/2017. The authors thank IT, namely via SQIG and the FCT projects number PEst-OE/EEI/LA0008/2013 and Confident PTDC/EEI-CTP/4503/2014. The authors also thank the H2020 SPARTA project under SU-ICT-03.
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Branco, P., Mateus, P. (2018). A Code-Based Linkable Ring Signature Scheme. In: Baek, J., Susilo, W., Kim, J. (eds) Provable Security. ProvSec 2018. Lecture Notes in Computer Science(), vol 11192. Springer, Cham. https://doi.org/10.1007/978-3-030-01446-9_12
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