Securing Images using Bifid Cipher associated with Arnold Map

Article type: Research Article

Authors: Kumar, Sachin^{a; *} | Suyal, Swati^b | Kumar, Ashok^b

Affiliations: [a] Scientist ‘E’, Government of India, New Delhi-110023, India | [b] Department of Mathematics, HNB Garhwal University, Srinagar-246174, India

Correspondence: [*] Corresponding author. E-mail: dr.sachin@gov.in.

Abstract: In this paper, a scheme for image data security is designed by using Bifid cipher and Arnold map. The conventional 2D-Bifid cipher is changed to handle the encryption and decryption of color images. Further, a block-based method is realized using Arnold map to encrypt and decrypt the image data of square as well as non-square sizes. The proposed scheme is constructed on a widely adopted cryptographic framework, i.e., substitution-permutation design, where Bifid cipher-based scheme acts as a substitution layer and Arnold map-based scheme acts as a diffusion layer. The designed scheme has a huge key space with key sensitivity not only to accurate keys but also to their accurate orders. The practicability and performance of the designed scheme is validated by conducting a detailed analysis along with a comparative study. This paper contributes to a simple, efficient and secure image encryption method, which outperforms to the related works.

Keywords: Image security, Image encryption, Image decryption, Bifid cipher, Arnold map

DOI: 10.3233/JCS-230101

Journal: Journal of Computer Security, vol. Pre-press, no. Pre-press, pp. 1-24, 2024