Quantum bit commitment with cheat sensitive binding and approximate sealing

TL;DR

This paper introduces a cheat sensitive quantum bit commitment scheme using single photons, ensuring high detection probability for cheating and minimal cheating success probability, with practical implementation feasibility.

Contribution

It presents a novel cheat sensitive QBC scheme based on single photons, enhancing security and practicality over existing methods.

Findings

Cheat success probability for Bob approaches 0 as photon number increases.

Detection probability for Alice's cheating approaches 1 with more photons.

Scheme is feasible with current technology.

Abstract

This paper proposes a cheat sensitive quantum bit commitment (CSQBC) scheme based on single photons, in which Alice commits a bit to Bob. Here, Bob only can cheat the committed bit with probability close to $0$ with the increasing of used single photons' amount. And if Alice altered her committed bit after commitment phase, she will be detected with probability close to $1$ with the increasing of used single photons' amount. The scheme is easy to be realized with nowadays technology.