TJ-ACA: An Advanced Cryptographic Algorithm for Color Images using Ikeda Mapping
Taranjit Kaur, Reecha Sharma · 2013
Presently, cryptography of images is of high concern due to highly confidential information contained in it. Image encryption is difficult as compared to text encryption because of high correlation among pixels and bulk information capacity. A newly proposed algorithm based on symmetric key algorithm, TJ-ACA, an advanced cryptographic algorithm will make use of pixel position alteration, and pixel intensity surrogation through which a visually changed image i.e. encrypted image is obtained. In this algorithm, ikeda mapping and various methods are used to get highly secure image. To increase the security ikeda mapping is done at five different values instead of single value. This proposed algorithm is applicable for color images and also for images on which steganography has been applied and by this method we get lossless decrypted image. This method resists Brute Force attack. TJ-ACA can be applied to all sizes images which can be used in medical, aerial application.