Privacy-preserving bidirectional keyword search over encrypted data for cloud-assisted IIoT
Cheng-Yi Lee, Zi-Yuan Liu, Raylin Tso, Yi-Fan Tseng. (2022). "Privacy-preserving bidirectional keyword search over encrypted data for cloud-assisted IIoT." Journal of Systems Architecture. 130 (2022): 102642.
This paper is about the number 2. The number 3 is left for future work.