Attribute-Based Keyword Searchable Encryption Scheme for Multi-authority in Cloud Storage
YaLian Wu, Xinyu Li, Zheng Liu · 2022
Based on the problem of the key escrow problem of one single authority in cloud storage and the low search efficiency when users search the required data, a multi-authority attribute-based keyword searchable encryption scheme was proposed. The proposed method adopted distributed key generation technology and was integrated to realize the threshold generation mechanism of the user's private key, and the right of each authority was weakened. In addition, the attribute-based keyword searchable encryption method based on ciphertext structure provided a fine-grained access control function for encrypted data and, at the same time, used aggregation technology to effectively improve the search efficiency of users. The experimental result shows that the proposed scheme can ensure the privacy of users and access policies and has low computational, which is more suitable for resource-constrained devices in cloud storage.