SECURE SEARCHING OF SHARED AND ENCRYPTED DATA IN MULTIPARTY ENVIRONMENT

Computer Engineering

Encryption is well established technology for protecting sensitive data. Multiparty Searchable Encryption is a scheme in which multiple users store and shares their data with each other. The scheme classified in to two entities: A server and set of users. Achieving multiparty searching is challenging as existing systems are not reaching the secure, searchable encryption because of the set of users shares the key between them. Also it is not forming scalable solution for multi-party searching and settings, where users outsource their encrypted data to particular cloud server and selectively authorize each other to search. There can be a possibility that the cloud server may collude with some harmful users, it is a challenge to have a more secure and scalable multiparty searchable encryption (MPSE) scheme. The proposed scheme, advanced Multi-Party Searchable Encryption allows a key server to solve the key sharing problem. The new scheme permits multi keyword searching with homomorphic encryption and additionally enables searching keyword within the form of checksum. Moreover, the evaluations show the speed of proposed scheme compared with the old MPSE scheme with respect to searching and encryption/decryption.

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