Image encryption based on chaotic system

Nowadays, information hiding and encryption has become important with the developing technology. Steganography which is an art of hiding ensures undetection of the existence of information, meanwhile cryptography aims protection by encrypting a document. In this study, image steganography, important for information security and image encryption application based on chaotic system have been performed. Image steganography carried out with two different ways using LSB and L3B methods. The text is hidden into the image after it is encrypted by RSA asymmetric encryption. Analysis are formed about advantages and disadvantages of LSB and L3B methods and changes caused in the image. Two and three-dimensional phase portraits and chaotic time series of chaotic systems that is used in image encryption has been investigated. After the investigation of chaotic systems behavior, chaotic neural network based 24-bit RGB and 3D KCM based gray level image encryption applications was performed. In these algorithms, 1D, 2D and 3D chaotic systems are used for image shuffling, key generation, etc. Security and performance analysis of encryption algorithms have been performed. It is observed that image encryption algorithms based on KNA and KCM have superior performances.