Research And Realization Of Image Encryption Based On Chaotic System

With the rapid development of computer network technology and multimedia technology, more and more digital images go across the world over the transmission media. Due to some intrinsic features of image, such as bulk capacity of data, it is troublesome in image encryption for conventional cryptographic algorithms such as DES, AES and RSA. In recent years, digital image encryption scheme based on chaotic maps have drawn a lot of attention and been extensively researched.The distinct properties of chaos, such as sensitivity dependence on initial conditions and system parameters, ergodicity, quasi-randomness, accurately regeneration and uncertain for forcasting, are just fit for demands of cryptology, which grant chaotic system have potential value in digital image encryption and security communication area. It is hopeful to scheme out an image encryption system which can be easily controlled and own high security.The paper analysis and point out the security problems of several current image encryption schemes based on chaotic system. Aimed at solving the problems, the paper presents two new schemes based on chaotic system, which adopt new techniques to improve security performance. The result of security analysis and simulation experiments indicate that the new schemes have high security performance, be efficient and can be easily realized.