Modified Algorithm of Encryption and Decryption of Images using Chaotic Mapping

In recent years, the chaos based cryptographic algorithms have suggested some new and efficient ways to develop secure image encryption techniques. In this paper a new approach for image encryption is based on chaotic baker map and chaotic Lorenz map in order to meet the requirements of the secure image transfer. In the proposed image encryption scheme, an external secret key of 128 bit and two chaotic maps are employed. The initial conditions for both maps are derived using the external secret key by providing different weight age to all its bits. The results of experiment show that the proposed image encryption scheme provides an efficient and secure way for real time image encryption and transmission.