A simple unconditionally secure quantum bit commitment protocol via quantum teleportation

Details A simple unconditionally secure quantum bit commitment protocol via quantum teleportation A simple unconditionally secure quantum bit commitment protocol via quantum teleportation

2003-05-23

arxiv.org/abs/quant-ph/0305142v3

Physics

Quantum Physics

5 pages, revtex4; significant changes (see footnote)

Scientific paper

By using local quantum teleportation of a fixed state to one qubit of an entangled pair sent from the other party, it is shown how one party can commit a bit with only classical information as evidence that results in an unconditionally secure protocol. The well-known ``impossibility proof'' does not cover such protocols due to its different commitment and opening prescriptions, which necessitate actual quantum measurements among different possible systems that cannot be entangled as a consequence.

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