Flexible Key Revocation and Access Control for a Privacy-Protecting Cloud CBIR System
Hao Liu, Hideaki Goto · 2017
While cloud services are becoming more and more widely used, their security issues are noticed by researchers. Multimedia data, especially images, which usually contain a lot of private information, sometimes are carelessly handled by users and the cloud servers as well. There for, it is necessary to protect those outsourced image data. Although data encryption is useful for storage purposes, data retrieval becomes a problem. Thanks to the techniques of searchable encryption (SE), it is becoming more efficient to perform query over encrypted data. However, most of the current SE schemes are not capable of managing image data. Another common problem for SE schemes is that it is usually inefficient for them to perform user privilege revocation and access control. This paper proposed a system framework of a SE scheme for a cloud image database based on Content-based Image Retrieval (CBIR) with flexible key revocation and access control.