A Secure Multiparty Quantum Homomorphic Encryption Scheme

Jing-Wen Zhang, Xiu-Bo Chen, Gang Xu, Heng-Ji Li, Ya-Lan Wang, Li-Hua Miao, Yi-Xian Yang
2022 Computers Materials & Continua  
The significant advantage of the quantum homomorphic encryption scheme is to ensure the perfect security of quantum private data. In 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 server. Firstly, each client obtains a secure encryption key through the measurement device independent quantum key distribution protocol and
more » ... pts the private data by using the encryption operator and key. Secondly, 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 data. Thirdly, 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 evaluation. The operation and the permission to access the data performed by the client and the server are clearly pointed out. Finally, a concrete security analysis shows that the proposed multiparty quantum homomorphic encryption scheme can securely resist outside and inside attacks.
doi:10.32604/cmc.2022.029125 fatcat:dgl7zyd74nbkzo2dwv564ixeti