Cryptology ePrint Archive: Report 2019/785

A publicly verifiable quantum blind signature scheme without entanglement based on asymmetric cryptography

Yalin Chen and Jue-Sam Chou and Liang-Chun Wang and Yu-Yuan Chou

Abstract: In recent years, several cryptographic scholars have proposed quantum blind signature schemes. However, their methods require the signatories and the inspectors to share common keys in advance, which makes them not only complicated in concept, but also suffering deniable problem. Moreover, due to the fact that not everyone can verify the blind signature, it needs to have a designated verifier. In view of Laurent, et al.’s argument that other than the assumption of the pre-image being collision-free, the one-way hash function is an attractive cryptographic component in the post-quantum era when designing a cryptosystem. Inspired by this, we propose a publicly verifiable quantum blind signature scheme based on the hash function. After security analyses, we confirm that our quantum blind signature not only is secure, but also have the needed properties. It includes anonymity, unforgeability, non-repudiation, blindness, public verifiability, and traceability. Hence, we conclude that this approach is better than the state-of-the-art, and is therefore more suitable for applications in real life, such as, mobile payments, quantum voting, or quantum government.

Category / Keywords: cryptographic protocols / Undeniable quantum signature scheme, Impersonation attack, Quantum asymmetric cryptography, Trapdoor one-way function, Single-qubit rotations encryption, Publicly verifiable signature

Date: received 4 Jul 2019

Contact author: jschou at nhu edu tw, jschou at mail nhu edu tw

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Version: 20190714:152917 (All versions of this report)

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