Cloud Secured Protocol based on Partial Homomorphic Encryptions

Abstract

Cloud computing is a paradigm that provides access to infrastructures on demand in order to solve a given computational problem. It's a technology that allows to store and process data on remote servers and access it anytime and from any device connected to Internet. To ensure the confidentiality of data, many works had been done based on homomorphic encryption. In this paper, a secured protocol based on partial homomorphic encryptions is proposed to allow clients to send encrypted requests to the Cloud which performs processing without decrypting data and it returns the encrypted result to the clients. We will compare this protocol to the fully homomorphic encryption and show its advantages.