A state of art review on homomorphic schemes in cloud computation

Cloud service providers play a vital role in data storage and data processing by providing software, platform and infrastructure as service. The third party cloud vendors allow several clients to share the resources. The resource sharing is a threat for the privacy of the user data. Other than the cotenants the parties involved in data access also affect the privacy of user information. Researches introduced the homomorphic algorithms that do not disclose the encrypted data during processing it. In this paper, we discuss the different schemes proposed to implement homomorphism and the factors that still to be addressed in implementing homomorphism in real time.