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Post-Quantum One-Time Linkable Ring Signature and Application to Ring Confidential Transactions in Blockchain (Lattice RingCT v1.0)

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Information Security and Privacy (ACISP 2018)

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Abstract

In this paper, we construct a Lattice-based one-time Linkable Ring Signature (L2RS) scheme, which enables the public to verify if two or more signatures were generated by same signatory, whilst still preserving the anonymity of the signatory. The L2RS provides unconditional anonymity and security guarantees under the Ring Short Integer Solution (Ring-SIS) lattice hardness assumption. The proposed L2RS scheme is extended to be applied in a protocol that we called Lattice Ring Confidential transaction (Lattice RingCT) v1.0, which forms the foundation of the privacy-preserving protocol in any post-quantum secure cryptocurrency such as Hcash.

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Notes

  1. 1.

    The Ring-SIS and Ring-LWE refer to the Ring mathematical structure and differ from the Ring in the Ring Signature scheme.

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Acknowledgement

The work of Ron Steinfeld and Amin Sakzad was supported in part by ARC Discovery Project grant DP150100285. This work was also supported by the Monash-HKPU-Collinstar Blockchain Research Lab.

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Authors and Affiliations

  1. Faculty of IT, Monash University, Melbourne, Australia

    Wilson Abel Alberto Torres, Ron Steinfeld, Amin Sakzad, Joseph K. Liu, Veronika Kuchta & Nandita Bhattacharjee

  2. Hong Kong Polytechnic University, Hung Hom, Hong Kong

    Man Ho Au

  3. Collinstar Capital, Melbourne, Australia

    Jacob Cheng

Authors
  1. Wilson Abel Alberto Torres
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  2. Ron Steinfeld
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  4. Joseph K. Liu
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  7. Man Ho Au
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Corresponding authors

Correspondence to Wilson Abel Alberto Torres , Ron Steinfeld , Amin Sakzad or Joseph K. Liu .

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Editors and Affiliations

  1. University of Wollongong, Wollongong, NSW, Australia

    Willy Susilo

  2. University of Wollongong, Wollongong, NSW, Australia

    Guomin Yang

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Alberto Torres, W.A. et al. (2018). Post-Quantum One-Time Linkable Ring Signature and Application to Ring Confidential Transactions in Blockchain (Lattice RingCT v1.0). In: Susilo, W., Yang, G. (eds) Information Security and Privacy. ACISP 2018. Lecture Notes in Computer Science(), vol 10946. Springer, Cham. https://doi.org/10.1007/978-3-319-93638-3_32

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  • DOI: https://doi.org/10.1007/978-3-319-93638-3_32

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