Insecurity of a relativistic quantum commitment scheme

TL;DR

This paper demonstrates a successful cheating strategy against a previously claimed unconditionally secure relativistic quantum commitment scheme, effectively disproving its security.

Contribution

The authors reveal a flaw in a prior quantum commitment scheme by providing a cheating strategy that guarantees success, challenging its claimed security.

Findings

Alice can cheat with 100% probability

The scheme's security claim is invalidated

The paper exposes vulnerabilities in the scheme

Abstract

We propose a cheating strategy to a relativistic quantum commitment scheme [Sci Rep 2014;4:6774] which was claimed to be unconditionally secure. It is shown that the sender Alice can cheat successfully with probability 100%, thus disproving the security claim.