Searchable encryption scheme with limited search scope for group users
Haiyang Peng, Guishan Dong, Hao Yao, Yue Zhao, YuXiang Chen · 2020
Aiming at the problem that most existing searchable encryption cannot effectively prevent information leakage from the internal user department, we propose a new multi-user searchable encryption scheme for group users to limit the search range. Searchable encryption can solve the problem of convenient use of data stored in a cloud server in a secret state. This solution divides users into different user groups and builds a segmented index. When users search, they first find the corresponding keywords, and then match the ID of the file that meets the access range through the user group ID to obtain the file Storage address. The searchable encryption scheme proposed in this paper for group users to limit the search range can improve the fine-grained user search range in multi-user searchable encryption and define different search ranges for different user groups. Two users who are not in the same user group cannot search for files uploaded by members of the other group, which reduces the risk of internal leakage of data stored in the cloud server.