Encryption of Image Using Chaotic Map

The advent of internet has paved the way for transmitting more and more information over the internet in a very less time and multimedia technology is also not untouched with it. Audio, images & other multimedia are being transmitted over the internet. The traditional encryption schemes appear not to be ideal for image applications, due to some intrinsic features of images such as bulk data capacity and high redundancy, which are troublesome for traditional encryption. Along with it sometimes image applications also have their own requirements like real-time processing, image format consistence, and data compression for transmission. Simultaneous fulfillments of these requirements, along with high security and high quality demands, have presented great challenges to real-time imaging practice. The traditional encryption schemes require extra operations on compressed image data, thereby demanding long computational time and high computing power. A great deal of work on application of chaos to image cryptography has been carried out in the last decade which overcomes the demerits of traditional encryption algorithm. This paper contains two encryption algorithms and their analysis. And a new technique combining the benefits of the two systems has been proposed.