Securing quantum bit commitment through reverse quantum communication

Details Securing quantum bit commitment through reverse quantum communication Securing quantum bit commitment through reverse quantum communication

2001-12-28

arxiv.org/abs/quant-ph/0112172v2

Physics

Quantum Physics

4 pages

Scientific paper

Einstein-Podolsky-Rosen- (EPR) and the more powerful Mayers-Lo-Chau attack impose a serious constraint on quantum bit commitment (QBC). As a way to circumvent them, it is proposed that the quantum system encoding the commitment chosen by the committer (Alice) should be initially prepared in a seperable quantum state known to and furnished by the acceptor (Bob), rather than Alice. Classical communication is used to conclude the commitment phase and bind Alice's subsequent unveiling. Such a class of secure protocols can be built upon currently proposed QBC schemes impervious to a simple EPR attack. A specific scheme based on the Brassard-Crepeau-Josza-Langlois protocol is presented here as an example.

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