Another simple unconditionally secure quantum bit commitment protocol -- beating entanglement with entanglement

Details Another simple unconditionally secure quantum bit commitment protocol -- beating entanglement with entanglement Another simple unconditionally secure quantum bit commitment protocol -- beating entanglement with entanglement

2003-05-23

arxiv.org/abs/quant-ph/0305143v3

Physics

Quantum Physics

3 pages, revtex4; title has changed, other significant changes (see footnote)

Scientific paper

It is shown how the evidence state space in quantum bit commitment may be made to depend on the bit value 0 or 1 with split entangled pairs. As a consequence, one can obtain a protocol that is perfectly concealing, but is also $\epsilon$-binding because the bit-value dependent evidence space prevents the committing party from cheating by means of a local transformation that is independent of the part of evidence state space that has never been in his possession.

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