文摘
In the literature He et?al. (Quantum Inf Process, 2011) performed the cryptanalysis about the protocol of secure quantum auction with post-confirmation, and proposed the melioration algorithm in order to defeat the collusion among some malicious bidders in Zhao et?al.’s protocol (Zhao et?al. in Opt Commun 283:3194, 2010). But unfortunately, this protocol can’t defeat the collusion among some malicious bidders either. In this paper, we will analyze the security of He et?al.’s protocol and point out the potential loophole. Furthermore, we propose an improved protocol which can defeat the collusion among malicious bidders effectively.