Efficient Image Encryption Approach Based on Chaos Technique

Image encryption is one of the most common and important method of image data encryption. Image encryption deals with applying image encryption algorithms to the sending image and convert it into cipherimage, and only authorized person can decrypt the cipher-image to gent the original image, this done using secret key(s). There are big numbers of encryption techniques including chaos-based schemes, some of them utilize one-dimensional chaotic maps for encryption, and other using two-dimensional or more dimensions chaotic maps. The big challenge in this field is how to generate a cipher-image with smooth normal distribution, in addition that the decrypted image is retrieved with minimum error. The aim of this work is to implement an acceptable image encryption approach to achieve high system performance. The implemented system based on chaos technique in which the original image is divided into parts and then replacing the positions of these parts to form the first level of encryption, then you can go down in the division process at the desired level. The proposed approach is implemented via three steps; flipping, shifting and adding fft operation. This approach achieve a good encrypted image, in addition the retrieved image will be at high performance.

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