CONFERENCE / ICCAIS-2026

The security of digital images in the transmission process has gained significant importance in recent times due to the development of online communication systems. The present paper proposes a new approach in image encryption and decryption. Generally, the approach considers the use of symmetric key encryption and decryption and asymmetric key encryption and decryption. Here, the linear combination of permutation and substitution processes has been derived. Further, the efficiency of image encryption and decryption can be tested by using various key parameters, such as entropy, NPCR, UACI, and PSNR. Evaluation of the proposed approach reveals that randomness in the encrypted images is very high, and the image can be decoded or obtained accurately during the decryption process.