Same Initial States Attack in Yang et al.'s Quantum Private Comparison Protocol and the Improvement
Quantum Physics
2013-12-20 v1
Abstract
In Yang et al.'s literatures (J. Phys. A: Math. 42, 055305, 2009; J. Phys. A:Math. 43, 209801, 2010), a quantum private comparison protocol based on Bell states and hash function is proposed, which aims to securely compare the equality of two participants' information with the help of a dishonest third party (TP). However, this study will point out their protocol cannot resist a special kind of attack, TP's same initial states attack, which is presented in this paper. That is, the dishonest TP can disturb the comparison result without being detected through preparing the same initial states. Finally, a simple improvement is given to avoid the attack.
Keywords
Cite
@article{arxiv.1312.5562,
title = {Same Initial States Attack in Yang et al.'s Quantum Private Comparison Protocol and the Improvement},
author = {Wen-Jie Liu and Chao Liu and Zhi-Hao Liu and Jing-Fa Liu and Huan-Tong Geng},
journal= {arXiv preprint arXiv:1312.5562},
year = {2013}
}
Comments
7pages,1 figure