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- Title
A multiphase encryption scheme using RSA, modified RMAC and Chen's hyperchaotic map.
- Authors
Singh, Deep; Kumar, Sandeep
- Abstract
In the present time of increasing digital communication, the images are widely used over the multimedia networks for sharing of information. At the same time to ensure the security of images during transmission of data becomes a great challenge for cryptographers. In this paper, a new multi-phases image encryption algorithm based on the RSA cryptosystem and modified random matrix affine cipher (MRMAC) is proposed. The Chen's hyperchaotic system and Arnold cat map are used to create more distraction from the relationship between the original image and ciphered image. The Chen's hyperchaotic system is used for diffusion, whereas the Arnold cat map is used for increasing the confusion among pixels. In this proposed algorithm the image ciphering is carried out in different phases. Firstly the given image is encrypted using RSA algorithm with large primes. Secondly, in modified RMAC, random blocks of random entries using Chen's hyperchaotic system are generated and are diffused with image pixels using bitwise XOR operation. Also, we create confusion of pixels within these diffused blocks, and confusion of blocks as well using parameters of MRMAC. The randomness in the algorithm is improved using MRMAC is advantage against differential attacks. Further, the Arnold cat map is used to enhance the level of confusion. Since, it is tremendously difficult to factorize the product of large prime numbers, therefore, the security of data in RSA algorithm increases tremendously. For the proper decryption of ciphered images, one must have exact values of keys and their correct order. It is impossible to guess the decrypted image even with a very small change in a single key. The results obtained in statistical and security analysis shows that the proposed algorithm has a huge key space, extreme security and key sensitivity, which proves that scheme is efficient and highly secure.
- Subjects
RSA algorithm; IMAGE encryption; MULTIMEDIA communications; PRIME numbers; INFORMATION networks; DATA transmission systems; IMAGE transmission
- Publication
Multimedia Tools & Applications, 2024, Vol 83, Issue 19, p57059
- ISSN
1380-7501
- Publication type
Article
- DOI
10.1007/s11042-023-17727-2