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Entropy 2019, 21(4), 336; https://doi.org/10.3390/e21040336

A New Quantum Blind Signature Scheme with BB84-State

1
School of Mathematics and Computation Science, Anqing Normal University, Anqing 246133, China
2
School of Mathematical Sciences, University of Science and Technology of China, Hefei 230026, China
*
Author to whom correspondence should be addressed.
Received: 21 January 2019 / Revised: 25 February 2019 / Accepted: 25 March 2019 / Published: 28 March 2019
(This article belongs to the Section Quantum Information)
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PDF [336 KB, uploaded 29 March 2019]
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Abstract

The blind signature is widely used in cryptography applications because it can prevent the signer from gaining the original message. Owing to the unconditional security, the quantum blind signature is more advantageous than the classical one. In this paper, we propose a new provable secure quantum blind signature scheme with the nonorthogonal single-photon BB84-state and provide a new method to encode classical messages into quantum signature states. The message owner injects a randomizing factor into the original message and then strips the blind factor from the quantum blind signature signed by the blind signer. The verifier can validate the quantum signature and announce it publicly. At last, the analytical results show that the proposed scheme satisfies all of the security requirements of the blind signature: blindness, unforgeability, non-repudiation, unlinkability, and traceability. Due to there being no use of quantum entanglement states, the total feasibility and practicability of the scheme are obviously better than the previous ones. View Full-Text
Keywords: BB84-state; quantum fingerprint; quantum encryption algorithm; quantum blind signature; unconditional security BB84-state; quantum fingerprint; quantum encryption algorithm; quantum blind signature; unconditional security
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Chen, F.-L.; Wang, Z.-H.; Hu, Y.-M. A New Quantum Blind Signature Scheme with BB84-State. Entropy 2019, 21, 336.

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