Cryptology ePrint Archive: Report 2017/716

Anonymous Post-Quantum Cryptocash

Huang Zhang and Fangguo Zhang and Haibo Tian and Man Ho Au

Abstract: In this paper, we construct an anonymous and decentralized cryptocash protocol which is secure in the quantum computation model. In order to achieve that, a linkable ring signature based on the ideal lattice is proposed. The size of a signature in our scheme is O(log N ), where N is the number of participants in the ring. The framework of our cryptocash system follows that of CryptoNote with some modi cations. By adopting the logarithmic size quantum resistant linkable ring signature scheme, our protocol is ecient and anonymous. We also introduce how to generate the verifying and signing key pairs of the linkable ring signature temporarily. With these techniques, both the sender and the receiver's privacy in transactions are protected even though they are published in the public ledger.

Category / Keywords: cryptographic protocols /

Date: received 24 Jul 2017, last revised 28 Sep 2017

Contact author: isszhfg at mail sysu edu cn

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Version: 20170929:044655 (All versions of this report)

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