Secure quantum bit commitment against empty promises

Journal Article · Tue Aug 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.022332· OSTI ID:20853049

Guangping, He ^[1]

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1. School of Physics and Engineering and Advanced Research Center, Sun Yat-sen University, Guangzhou 510275 (China)

The existence of unconditionally secure quantum bit commitment (QBC) is excluded by the Mayers-Lo-Chau no-go theorem. Here we look for the second-best: a QBC protocol that can defeat certain quantum attacks. By breaking the knowledge symmetry between the participants with quantum algorithm, a QBC protocol is proposed and is proven to be secure against a major kind of coherent attacks - the dummy attack, in which the participant makes an empty promise instead of committing to a specific bit. Therefore it surpasses previous QBC protocols which are secure against individual attacks only.

• OSTI ID: 20853049
• Journal Information: Physical Review. A, Vol. 74, Issue 2; Other Information: DOI: 10.1103/PhysRevA.74.022332; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALGORITHMS
QUANTUM COMPUTERS
QUANTUM CRYPTOGRAPHY
QUBITS
SYMMETRY