中国物理B ›› 2021, Vol. 30 ›› Issue (7): 70309-070309.doi: 10.1088/1674-1056/ac003b

所属专题: SPECIAL TOPIC — Quantum computation and quantum simulation

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

Jing-Wen Zhang(张静文)1, Xiu-Bo Chen(陈秀波)1, Gang Xu(徐刚)2,†, and Yi-Xian Yang(杨义先)1   

  1. 1 Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2 School of Information Science and Technology, North China University of Technology, Beijing 100144, China
  • 收稿日期:2021-03-25 修回日期:2021-04-30 接受日期:2021-05-12 出版日期:2021-06-22 发布日期:2021-07-09
  • 通讯作者: Gang Xu E-mail:gangxu_bupt@163.com
  • 基金资助:
    Project supported by the Fundamental Research Funds for the Central Universities (Grant No. 2019XDA02) and the Scientific Research Foundation of North China University of Technology.

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

Jing-Wen Zhang(张静文)1, Xiu-Bo Chen(陈秀波)1, Gang Xu(徐刚)2,†, and Yi-Xian Yang(杨义先)1   

  1. 1 Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2 School of Information Science and Technology, North China University of Technology, Beijing 100144, China
  • Received:2021-03-25 Revised:2021-04-30 Accepted:2021-05-12 Online:2021-06-22 Published:2021-07-09
  • Contact: Gang Xu E-mail:gangxu_bupt@163.com
  • Supported by:
    Project supported by the Fundamental Research Funds for the Central Universities (Grant No. 2019XDA02) and the Scientific Research Foundation of North China University of Technology.

摘要: Homomorphic encryption has giant advantages in the protection of privacy information. In this paper, we present a new kind of probabilistic quantum homomorphic encryption scheme for the universal quantum circuit evaluation. Firstly, 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 evaluation. By using the set synthesized by Clifford gates and T gates, it is feasible to perform the arbitrary quantum computation on the encrypted data. Secondly, our scheme is different from the previous scheme described by the quantum homomorphic encryption algorithm. From the perspective of application, a two-party probabilistic quantum homomorphic encryption scheme is proposed. It 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 data. Finally, the security of probabilistic quantum homomorphic encryption scheme is analyzed in detail. It 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

Abstract: Homomorphic encryption has giant advantages in the protection of privacy information. In this paper, we present a new kind of probabilistic quantum homomorphic encryption scheme for the universal quantum circuit evaluation. Firstly, 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 evaluation. By using the set synthesized by Clifford gates and T gates, it is feasible to perform the arbitrary quantum computation on the encrypted data. Secondly, our scheme is different from the previous scheme described by the quantum homomorphic encryption algorithm. From the perspective of application, a two-party probabilistic quantum homomorphic encryption scheme is proposed. It 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 data. Finally, the security of probabilistic quantum homomorphic encryption scheme is analyzed in detail. It demonstrates that the scheme has favorable security in three aspects, including privacy data, evaluated data and encryption and decryption keys.

Key words: quantum homomorphic encryption, universal quantum circuit, non-maximally entangled state, security

中图分类号:  (Quantum statistical mechanics)

  • 05.30.-d
03.67.Dd (Quantum cryptography and communication security) 03.65.-w (Quantum mechanics)