Finite Field-Based Three-Tier Cryptography Algorithm to Secure the Images

Abstract

Securing the information is an important component in the computer network domain. Image information security is a vital part of the information security. The main process of image cryptography is traversing the image cryptosystem with high processing power, and efficiency. It is in terms of satisfying the cryptography requirements like confidentiality, integrity, and authenticity. A finite field-based image cryptography algorithm called TIEA (Three-tier Image Encryption Algorithm) is proposed in this paper. This algorithm deliberated Shannon’s principles of cryptography like confusion and diffusion techniques of the images based on the finite field values. This paper also designed the key stream generation pattern based on the crypto key length. Two subkeys are generated for the purpose of crypto key and the key generation process is used to enhance the permutation of the key. Various benchmark images were tested with this proposed algorithm and also with other existing algorithms. The performance result shows that the proposed algorithm TIEA could be a better candidate algorithm for image security in the network domain.