Homomorphic Encryption Schemes: Steps to Improve the Proficiency

Homomorphic encryption schemes are malleable by design. In this paper, we find different approaches to practical homomorphic encryption schemes. Partial homomorphic encryption schemes, we observe that the main bottleneck of this scheme is that it is capable of or adapted for turning easily from one to another of various tasks. To solve this problem, we propose general approach to improve the versatility of this scheme by extending the message space. This can be applied to a wide range of partial homomorphic encryption schemes and also increase the application of this scheme. Fully homomorphic encryption schemes, we observe that the main bottleneck for this scheme is slow running speed and large cipher text. For this, we propose to compress the cipher text. For cipher text compression, the concept of scheme conversion is proposed.