Image Encryption Using Binary Key-images.
ABSTRACT This paper introduces a new concept for image encryption using a binary Â¿key-imageÂ¿. The key-image is either a bit plane or an edge map generated from another image, which has the same size as the original image to be encrypted. In addition, we introduce two new lossless image encryption algorithms using this key-image technique. The performance of these algorithms is discussed against common attacks such as the brute force attack, ciphertext attacks and plaintext attacks. The analysis and experimental results show that the proposed algorithms can fully encrypt all types of images. This makes them suitable for securing multimedia applications and shows they have the potential to be used to secure communications in a variety of wired/wireless scenarios and real-time application such as mobile phone services.
Conference Proceeding: A new digital image scrambling method based on Fibonacci numbers[show abstract] [hide abstract]
ABSTRACT: A new digital image scrambling method based on Fibonacci numbers is presented. The uniformity and periodicity of the scrambling transformation are discussed. Our scrambling transformation has the following advantages: (1) encoding and decoding is very simple and they can be applied in real-time situations (2) the scrambling effect is very good, the information of the image is re-distributed randomly across the whole image; and (3) the method can endure common image attacks, such as compression, noise and loss of data packet.Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on; 06/2004
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ABSTRACT: We propose a new optical image encryption technique based on exclusive-OR (XOR) operations for a security system that controls the entrance of authorized persons. The basic idea is that we convert a gray-level image to eight bit planes for image encryption. We use the XOR operation that is commonly used such as the well-known encryption method. The input image is encrypted by performing optical XOR operations with the key bit stream that are generated by digital encryption algorithms. The gray level input image is converted to eight bit planes, which are represented on a liquid crystal device (LCD). The key data represented on different LCDs is reproduced to eight bit planes by a lenslet array. The optical XOR operations between the key data and the bit planes are performed by the polarization encoding method. The results of XOR operations, which are detected by a CCD camera, are converted to an encrypted gray-level image and the image is used as an input to the binary phase extraction joint transform correlator for comparison with reference images. We present some simulation results that verify the proposed method.Optical Engineering 01/1999; 38(1):47-54. · 0.88 Impact Factor
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ABSTRACT: In this Letter, a new image encryption scheme is presented, in which shuffling the positions and changing the grey values of image pixels are combined to confuse the relationship between the cipher-image and the plain-image. Firstly, the Arnold cat map is used to shuffle the positions of the image pixels in the spatial-domain. Then the discrete output signal of the Chen's chaotic system is preprocessed to be suitable for the grayscale image encryption, and the shuffled image is encrypted by the preprocessed signal pixel by pixel. The experimental results demonstrate that the key space is large enough to resist the brute-force attack and the distribution of grey values of the encrypted image has a random-like behavior.Physics Letters A 10/2005; 346(1-3):153-157. · 1.77 Impact Factor