A survey of advance homomorphic encryption schemes used to securely store data in cloud

Abstract

Work has been conducted to determine the advanced homomorphic encryption scheme that is ideally suited to securely store data in the cloud. Some cloud service providers share information with third parties in order to provide effective cloud services. The third party can access the client's private data and modify the information to make it beneficial to the client. In cloud computing, the client's data is put in the cloud, and any computation of the data stored by the client is implemented in the cloud. Security is the biggest problem about cloud storage as a service provider can access, deliberately alter or even delete stored data. This concern made the researcher to find out the best advance Homomorphic Encryption Scheme that can be used for storing data securely in the cloud in order to curb the problem. Online survey was conducted where the researcher used the internet to have access to online materials such as journals; articles and was able to obtain 29 relevant papers for the study. Systematic Mapping Studies approach was used to scrutinize and categorize articles into groups from a larger dataset. The researcher has tested, compared and evaluated the time complexity, execution time and security of the homomorphic encryption schemes, Elgamal, RSA, SAM, SA, SDC and DGHV. As a result, in the calculations of the execution time of Elgamal, SA, SDC, DGHV, RSA and SAM schemes, it was observed that Elgamal is fast, but in terms of time complexity and security SAM is the best. SAM scheme shows that it has a very good complexity of time, its execution time is very fast and security can be trusted because its secret key is represented by a prime number and it is protected when ciphertext is retrieved. Therefore, SAM scheme is the best homomorphic encryption scheme for storing data securely in the cloud.