Revisiting “The Loophole of the Improved Secure Quantum Sealed-Bid Auction with Post-Confirmation and Solution”

Recently, Luo et al. make a detailed analysis on the security of quantum sealed-bid auction with post-confirmation protocol (Quantum Information Processing, Volume 11, Issue 6, pp 1359–1369, 2012) and present the corresponding improved strategy for its loophole. Unfortunately, we find their improved version is still not as secure as expected, since it is vulnerable to malicious bidders in collusion with the auctioneer. And there is an unreasonable suspicion in the honesty of the auctioneer for special situation. Then we propose an improved strategy, which can perfectly defeat kinds of attacks.     

Cryptanalysis and Improvement on “Robust EPR-Pairs-Based Quantum Secure Communication with Authentication Resisting Collective Noise”

Recently, Chang et al. [Sci Chin-Phys Mech Astron. 57(10), 1907–1912, 2014] proposed two robust quantum secure communication protocols with authentication based on Einstein-Podolsky-Rosen (EPR) pairs, which can resist collective noise. In this paper, we analyze the security of their protocols, and show that there is a kind of security flaw in their protocols. By a kind of impersonation attack, the eavesdropper can obtain half of the message on average. Furthermore, an improved method of their protocols is proposed to close the security loophole.     

The Security Problems in Some Novel Arbitrated Quantum Signature Protocols

With the development of quantum signature, two improved arbitrated quantum signature(AQS) protocols have been presented with different quantum encryptions. In this paper, some security loopholes during the two AQS protocols are proposed. In the enhanced arbitrated quantum signature(EAQS) protocol, though the signer is not able to deny his signature, the receiver can still forge some valid signatures. In the chaos-based arbitrated quantum signature(CAQS) protocol, the receiver can forge a valid signature without being caught, and the signer can also deny her signature after the signing phase. Finally, some potential improved ideas are discussed.     

The Cryptanalysis and Improvement of a Particular Quantum Voting Model

As an important topic of quantum cryptography, quantum voting has attracted more and more attentions recently. However, with our analysis, it can be seen that there exist some serious problems in a particular quantum voting model. Firstly, the voter does not have the ability to vote as his own. Secondly, the voter may be dishonest and can deny some corresponding voting results. Furthermore, some improvements will be presented to solve the loopholes.

     

喹唑啉酮的合成方法

介绍了以邻氨基苯甲腈、邻氨基芳甲酸、靛红酸酐、邻氨基苯甲酰胺、邻硝基苯甲酰胺、邻碘芳甲酰胺、邻卤苯甲酸、邻卤苯甲腈为底物时喹唑啉酮的合成方法及其研究进展,并对其进行了简要的评述。