Same Initial States Attack in Yang et al.'s Quantum Private Comparison Protocol and the Improvement

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.

7pages,1 figure

References in corpus (1)

• Experimental quantum teleportation

Cited by in corpus (9)

• Multiparty Quantum Sealed-Bid Auction Using Single Photons as Message Carrier
• An Efficient and Secure Arbitrary N-Party Quantum Key Agreement Protocol Using Bell States
• Cryptanalysis and improvement of the quantum private comparison protocol based on Bell entangled states
• Secure Quantum Private Comparison of Equality Based on Asymmetric W State
• Improved Deterministic N-To-One Joint Remote Preparation of an Arbitrary Qubit via EPR Pairs
• Deterministic Joint Remote Preparation of a Four-qubit Cluster-type State via GHZ states
• Multiparty quantum key agreement protocol secure against collusion attacks
• Quantum Privacy-Preserving Price E-Negotiation
• Comment on "Fault-Tolerate Quantum Private Comparison Based on GHZ States and ECC"