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Improved Multi-party quantum key agreement with Four-qubit Cluster States

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Computers, Materials & Continua 2022年第10期73卷 225-232页

作者： Hussein Abulkasim Eatedal Alabdulkreem Safwat Hamad Faculty of Science New Valley UniversityEl-Kharga&the Academy of Scientific Research and TechnologyCairoEgypt College of Computer and Information Sciences Princess Nourah bint Abdulrahman UniversityRiyadhSaudi Arabia Faculty of Computer and Information Sciences Ain Shams UniversityCairoEgypt

quantum key agreement is a promising key establishing protocol that can play a significant role in securing 5G/6G communication ***,Liu et al.(quantum Information Processing 18(8):1-10,2019)proposed a multi-party quantum key agreement protocol based on four-qubit cluster states was *** aim of their protocol is to agree on a shared secret key among multiple remote *** et *** four-qubit cluster states to be the quantum resources and the X operation to securely share a secret *** addition,Liu et al.’s protocol guarantees that each participant makes an equal contribution to the final *** authors also claimed that the proposed protocol is secure against participant attack and dishonest participants cannot generate the final shared key ***,we show here that Liu et *** is insecure against a collusive attack,where dishonest participants can retrieve the private inputs of a trustworthy participant without being ***,the corresponding modifications are presented to address these security flaws in Liu et al.’s protocol.

关键词： quantum key agreement 5G/6G communication networks collusive attacks quantum cryptography

New controlled quantum key agreement protocols based on Bell states

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The Journal of China Universities of Posts and Telecommunications 2022年第4期29卷 42-50页

作者： He Yefeng Yue Yuru Li Guoqing Liu Jixiang Di Man Pang Yibo School of Cyberspace Security Xi’an University of Posts and TelecommunicationsXi’an 710121China

The controlled quantum key agreement(CQKA)protocol requires a controller to oversee the process of all participants negotiating a key,which can satisfy the needs of certain specific *** CQKA protocols are mostly two-party or three-party,and they do not entirely meet the actual *** address this problem,this paper proposes new CQKA protocols based on Bell states and Bell *** new CQKA protocols can be successfully implemented for any N-party,not just ***,the security and efficiency analyses demonstrate that the new CQKA protocols are not only secure but also more efficient in terms of quantum bit.

关键词： quantum cryptography quantum key agreement controlled quantum key agreement Bell states controller

Analysis of Information Leakage in quantum key agreement

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Journal of Shanghai Jiaotong university(Science) 2006年第2期11卷 219-223页

作者：刘胜利郑东陈克非 Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 ChinaLab. of Computer Network and Information Security Xidian Univ. Xi'an 710071 Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China

quantum key agreement is one of the approaches to unconditional security. Since 1980’s, different protocols for quantum key agreement have been proposed and analyzed. A new quantum key agreement protocol was presented in 2004, and a detailed analysis to the protocol was given. The possible game played between legitimate users and the enemy was described: sitting in the middle, an adversary can play a “man-in-the-middle” attack to cheat the sender and receiver. The information leaked to the adversary is essential to the length of the final quantum secret key. It was shown how to determine the amount of information leaked to the enemy and the amount of uncertainty between the legitimate sender and receiver.

关键词： quantum key agreement analysis

Improved quantum key agreement protocol with authentication

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Chinese Physics B 2023年第5期32卷 308-313页

作者：郭继红柏明强雷小燕谢佳欣莫智文 Institute of Intelligent Information and quantum Information Sichuan Normal UniversityChengdu 610068China Research Center of Sichuan Normal University National-Local Joint Engineering Laboratory ofSystem Credibility Automatic VerificationChengdu 610066China School of Mathematical Sciences Sichuan Normal UniversityChengdu 610068China

In order to make the quantum key agreement process immune to participant attacks, it is necessary to introduce the authentication in the communication process. A quantum key agreement protocol with identity authentication that exploits the measurement correlation of six-particle entangled states is proposed. In contrast to some recently proposed quantum key agreement protocols with authentication, this protocol requires neither a semi-trusted third party nor additional private keys in the authentication process. The entire process of authentication and key agreement can be achieved using only n six-particle entangled states, which saves communication costs and reduces the complexity of the authentication ***, security analysis shows that this scheme is resistant to some important attacks.

关键词： quantum key agreement authentication six-particle entangled states

Controlling the key by choosing the detection bits in quantum cryptographic protocols

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Science China(Information Sciences) 2015年第11期58卷 200-210页

作者： LIU Bin GAO Fei HUANG Wei LI Dan WEN QiaoYan State key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications College of Computer Science Chongqing University

Eavesdropping detection is an indispensable process of most quantum cryptographic protocols. By publishing and comparing part of the shared bits, called as detection bits, the participants can check whether there exists an eavesdropper. Generally, the detection bits are chosen randomly. Consequently, the secret bits, i.e., the rest bits, are also random. Then, what if the detection bits are chosen non-randomly? Can the participant who chooses the detection bits make the secret bits to be a predetermined string he expected?This paper focuses on the participants’ key control capability when they choose the detection bits selectively in two-party quantum communication protocols. Concretely, we analyze the participants’ key control capability in different situations of different proportions of the detection bits. And we prove that the participants can predetermine, with high probability, any part of the secret bits of which the length is smaller than that of the detection bits. The above result has various potential applications in quantum cryptographic ***, utilizing this non-random selection of the detection bits, one can realize the function of a deterministic quantum key distribution protocol through a random one if the number of the detection bits is not smaller than that of the secret bits. What is more, we find that quite a few quantum key agreement protocols cannot guarantee the fairness of the key in the sense that the participant who chooses the detection bits can control the key somewhat.

关键词： eavesdropping detection deterministic quantum key distribution quantum key agreement quantum information quantum cryptography