A New Lightweight Approach for Multiuser Searchable Encryption in the Cloud

Recently the concept of storing data at the cloud server is becoming more and more popular, where the users can store their large amount of data at the cloud server very conveniently. Also concept of searchable encryption is gaining a lot of attention for the data transmission, which allows cloud to perform searching operations on encrypted data, whereas on the other hand the workload in the cloud server increases significantly. To overcome this issue, we propose a new scheme which provides searchable encryption, while reducing the burden in cloud remarkably. The third party manager is introduced here, which takes most of the workload on his side, while we make sure to keep him away from any sensitive data. Which results in better workload management while maintaining desired privacy. Proper security proofs and analysis is given for the proposed scheme. The results indicates the practicality of the proposed scheme, with reduced load in cloud server.