Two-Way Encryption and Decryption Technique Using Chaotic Maps

A cryptosystem incorporating multiple chaotic maps is proposed. The use of chaotic maps for image encryption is a common procedure but this does not ensure absolute security. This paper presents encryption of novel images, a technique that incorporates three different chaotic maps—Tent map, Logistic Map and Gauss Iterative Map for encryption. Image encryption will be a two-step process involving one chaotic map to randomly rearrange the pixels of individual RGB components and other maps to reorganize another image. These two will then be XORed to provide dual security. The technique’s strengths have been analysed and presented.