Lattice-based proxy-oriented identity-based encryption with keyword search for cloud storage

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Xiaojun Zhang, Yao Tang, Huaxiong Wang, Chunxiang Xu, Yinbin Miao, Hang Cheng

Published: 2019, Last Modified: 30 May 2026Inf. Sci. 2019EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: Highlights•We propose an efficient proxy-oriented identity-based encryption with keyword search scheme (PO-IBEKS) from lattices.•PO-IBEKS enables an original data owner authorizes a proxy to encrypt sensitive data as well as corresponding keywords and upload them to clouds.•PO-IBEKS can resist against insider keyword guessing attacks (IKGA).•PO-IBEKS can achieve ciphertext indistinguishability, existential unforgeability, and delegation security.•PO-IBEKS is much more practical in post-quantum secure cloud storage systems compared with existing schemes.