Privacy Preserving Searchable Encryption with Fine-Grained Access Control

Searchable encryption facilitates cloud server to search over encrypted data without decrypting the data. Single keyword based searchable encryption enables a user to access a subset of documents, which contains the keyword of the user's interest. In this paper, we present a single keyword based searchable encryption scheme for the applications where multiple data owners upload their data and then multiple users can access the data. The scheme uses attribute based encryption that allows user to access the selective subset of data from cloud without revealing his/her access rights to the cloud server. The scheme is proven adaptively secure against chosen-keyword attack in the random oracle model. We have implemented the scheme on Google cloud instance and the performance of the scheme found practical in real-world applications.

Automated summary

Searchable encryption allows cloud servers to search encrypted data without decryption. Single keyword-based encryption enables users to access subsets of documents containing specific keywords. The scheme presented in this paper uses attribute-based encryption to grant access to selective data subsets while maintaining user privacy.