Secure and Efficient Color Image Cryptography Using Two Secret Keys

The significance of digital color images in various applications necessitates the development of secure and efficient color image encryption techniques. This study presents a simple yet highly secure method for encrypting color images using dual secret keys, enhancing overall image security and safeguarding against hacking attempts. The first key generates index keys for encrypting and decrypting image segments, while the second key determines the starting point in the image_key and divides the unencrypted image into segments. These index keys are then employed to encrypt and decrypt the segments. Encryption and decryption of segments involve a straightforward process, distributing plain data based on the index key and retrieving decrypted data from encrypted data following the index key’s indices. The proposed method will be assessed and applied to various color images, with the results analyzed to demonstrate improvements in quality, sensitivity, and speed. The method’s speed will be compared with other techniques to highlight the acceleration offered by the proposed approach.