Comment on "A special attack on the multiparty quantum secret sharing of secure direct communication using single photons"

TL;DR

This paper critically analyzes a proposed attack on a multiparty quantum secret sharing protocol, demonstrating that the attack and similar variants are ineffective at extracting secret messages, thus reaffirming the protocol's security.

Contribution

The paper provides a detailed critique showing that the previously claimed attack on the quantum secret sharing protocol is invalid, reinforcing the protocol's security against such attacks.

Findings

The specific attack fails to extract secret messages.

Similar attack variants are also ineffective.

The protocol remains secure against the analyzed attack.

Abstract

In this comment, we show that the special attack [S.-J. Qin, F. Gao, Q.-Y. Wen, F.-C. Zhu, Opt. Commun. 281 (2008) 5472.], which claims to be able to obtain all the transmitted secret message bit values of the protocol of the multiparty quantum secret sharing of secure direct communication using single photons with random phase shift operations, fails. Furthermore, a class of similar attacks are also shown to fail to extract the secrete message.