Practical Quantum Bit Commitment Protocol Based on Quantum Oblivious Transfer

Author:

Song Yaqi,Yang Li

Abstract

Oblivious transfer (OT) and bit commitment (BC) are two-party cryptographic protocols which play crucial roles in the construction of various cryptographic protocols. We propose three practical quantum cryptographic protocols in this paper. We first construct a practical quantum random oblivious transfer (R-OT) protocol based on the fact that non-orthogonal states cannot be reliably distinguished. Then, we construct a fault-tolerant one-out-of-two oblivious transfer ( O T 1 2 ) protocol based on the quantum R-OT protocol. Afterwards, we propose a quantum bit commitment (QBC) protocol which executes the fault-tolerant O T 1 2 several times. Mayers, Lo and Chau (MLC) no-go theorem proves that QBC protocol cannot be unconditionally secure. However, we find that computing the unitary transformation of no-go theorem attack needs so many resources that it is not realistically implementable. We give a definition of physical security for QBC protocols and prove that the practical QBC we proposed is physically secure and can be implemented in the real world.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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1. Efficient Post Quantum Random Oblivious Transfer Based on Lattice;Wireless Algorithms, Systems, and Applications;2022

2. Madrid Quantum Network;The 16th International Conference on Availability, Reliability and Security;2021-08-17

3. Cryptanalysis and improvement of “Game theoretic security of quantum bit commitment”;Information Sciences;2021-01

4. Encoding scheme using quantum dots for single logical qubit information onto four-photon decoherence-free states;Scientific Reports;2020-09-18

5. Semi-Counterfactual Quantum Bit Commitment Protocol;Scientific Reports;2020-04-16

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