Attacks on Symmetric Quantum Coin-Tossing Protocols

TL;DR

This paper demonstrates a vulnerability in a symmetric quantum coin-tossing protocol, showing that it can be compromised by an attack, thus questioning its security in quantum cryptography.

Contribution

The paper introduces a specific attack on a previously proposed symmetric quantum coin-tossing protocol, revealing its insecurity.

Findings

The protocol is insecure against the proposed attack.

Quantum coin-tossing protocols need careful security analysis.

The attack compromises the protocol's intended fairness.

Abstract

We suggest an attack on a symmetric non-ideal quantum coin-tossing protocol suggested by Mayers Salvail and Chiba-Kohno. The analysis of the attack shows that the protocol is insecure.