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Proceedings Paper

Secure bit commitment based on quantum one-way function
Author(s): Bo Yu; Zheng-Wei Zhou; Jian Li; Guang-Can Guo
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Paper Abstract

Although Mayers, Lo and Chau successfully showed that unconditionally secure quantum bit commitment (QBC) is impossible, we present a secure QBC protocol which is quite different from the model used in their proofs. If Alice wants to commit a bit b, she first encodes b into a series of classical bit strings of the same length. The requirement is that the modulo 2 sum of all bits in every bit string equals to b. Then Alice uses quantum one-way function to produce quantum states which are corresponding to the encoded classical bit strings and will be sent to Bob as evidence. The quantum one-way function used here is just that was successfully applied in Gottesman and Chuang's quantum digital signatures. When it comes to the unveilingtime, Alice only sends the bit strings to Bob. Finally, Bob generates quantum states form the bit strings by the same quantum one-way function and uses controlled-swap circuit to check whether the quantum states are identical with the evidence.

Paper Details

Date Published: 13 September 2002
PDF: 5 pages
Proc. SPIE 4917, Quantum Optics in Computing and Communications, (13 September 2002); doi: 10.1117/12.483024
Show Author Affiliations
Bo Yu, Univ. of Science and Technology of China (China)
Zheng-Wei Zhou, Univ. of Science and Technology of China (China)
Jian Li, Univ. of Science and Technology of China (China)
Guang-Can Guo, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 4917:
Quantum Optics in Computing and Communications
Songhao Liu; Guangcan Guo; Hoi-Kwong Lo; Nobuyuki Imoto, Editor(s)

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