Cryptanalysis of fair quantum blind signatures |
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| Authors: | He Li-Bao Huang Liu-Sheng Yang Wei Xu Rui |
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| Affiliation: | National High Performance Computing Center, Department of Computer Science and Technology, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou 215123, China;National High Performance Computing Center, Department of Computer Science and Technology, University of Science and Technology of China, Hefei 230026, China;Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou 215123, China;Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou 215123, China;Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou 215123, China |
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| Abstract: | We investigate the fair quantum blind signature scheme proposed by Wang and Wen [Wang T Y and Wen Q Y 2010 Chin. Phys. B 19 060307], which uses the fundamental properties of quantum mechanics and the availability of a trusted arbitrator. However, in this paper, we find that the protocol cannot satisfy the property of non-forgeability even under the condition that the trusted arbitrator is totally credible. Moreover, a simple feasible suggestion for improving the protocol is proposed. |
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| Keywords: | fair blind signature single photons hash function |
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