Image Encryption and Decryption using Chaotic Bit level Pixel Permutation

Abstract

Present day communication is tending towards the digital technologies for a faster, better and enhanced way of data transfer. The digital data transfer is an efficient way to spread the information which saves the time for the information exchange. Most of the data is transferred over the internet in the pictorial form rather than theoretical form to reduce the transfer time. Images are the best available pictorial way of data interpretation. The data transmitted over the internet are prone to security issues caused by internet hackers. In order to save the data from being exposed to unauthorized users, it is advisable to transfer the data, different from its original form. The process of changing the data in one form to another with the same information is referred as encryption and retrieving the information from its encrypted form is referred as decryption. Encryption and decryption are image processing techniques that help in efficient and secured data transfer over the internet. The paper illustrates an efficient method of encrypting and decrypting images using bit-level pixel permutation and pixel correlation techniques.