A simple unconditionally secure quantum bit commitment protocol via quantum teleportation

摘要

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