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A Secure Multiparty quantum homomorphic encryption Scheme

Computers, Materials & Continua 2022年第11期73卷 2835-2848页

作者： Jing-Wen Zhang Xiu-Bo Chen Gang Xu Heng-Ji Li Ya-Lan Wang Li-Hua Miao Yi-Xian Yang Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China School of Information Science and Technology North China University of TechnologyBeijing100144China Advanced Cryptography and System Security Key Laboratory of Sichuan Province Sichuan610025China quantum Technology Lab&Applied Mechanics Group University of MilanMilan20133Italy Department of Computer Science Faculty of Engineering and Physical SciencesUniversity of SurreyGuildfordSurreyGU27XHUnited Kingdom Huawei Technologies Co.Ltd Shenzhen518129China

The significant advantage of the quantum homomorphic encryption scheme is to ensure the perfect security of quantum private *** this paper,a novel secure multiparty quantum homomorphic encryption scheme is proposed,which can complete arbitrary quantum computation on the private data of multiple clients without decryption by an almost dishonest ***,each client obtains a secure encryption key through the measurement device independent quantum key distribution protocol and encrypts the private data by using the encryption operator and ***,with the help of the almost dishonest server,the non-maximally entangled states are preshared between the client and the server to correct errors in the homomorphic evaluation of T gates,so as to realize universal quantum circuit evaluation on encrypted ***,from the perspective of the application scenario of secure multi-party computation,this work is based on the probabilistic quantum homomorphic encryption scheme,allowing multiple parties to delegate the server to perform the secure homomorphic *** operation and the permission to access the data performed by the client and the server are clearly pointed ***,a concrete security analysis shows that the proposed multiparty quantum homomorphic encryption scheme can securely resist outside and inside attacks.

关键词： quantum homomorphic encryption secure multiparty computation almost dishonest server security

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Universal quantum circuit evaluation on encrypted data using probabilistic quantum homomorphic encryption scheme

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Chinese Physics B 2021年第7期30卷 45-54页

作者：张静文陈秀波徐刚杨义先 Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing 100876China School of Information Science and Technology North China University of TechnologyBeijing 100144China

homomorphic encryption has giant advantages in the protection of privacy *** this paper,we present a new kind of probabilistic quantum homomorphic encryption scheme for the universal quantum circuit ***,the pre-shared non-maximally entangled states are utilized as auxiliary resources,which lower the requirements of the quantum channel,to correct the errors in non-Clifford gate *** using the set synthesized by Clifford gates and T gates,it is feasible to perform the arbitrary quantum computation on the encrypted ***,our scheme is different from the previous scheme described by the quantum homomorphic encryption *** the perspective of application,a two-party probabilistic quantum homomorphic encryption scheme is *** is clear what the computation and operation that the client and the server need to perform respectively,as well as the permission to access the ***,the security of probabilistic quantum homomorphic encryption scheme is analyzed in *** demonstrates that the scheme has favorable security in three aspects,including privacy data,evaluated data and encryption and decryption keys.

关键词： quantum homomorphic encryption universal quantum circuit non-maximally entangled state security

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