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This paper proposes a secure approach for encryption and decryption of digital images with chaotic map lattices. In the proposed encryption process,eight different types of operations are used to encrypt the pixels of an image and one of them will be used for particular pixels decided by the outcome of the chaotic map lattices. To make the cipher more robust against any attacks,the secret key is modified after encrypting each block of sixteen pixels of the image. The experimental results and security analysis show that the proposed image encryption scheme achieves high security and efficiency. 相似文献
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In recent years, the chaos based cryptographic algorithms have
suggested some new and efficient ways to develop secure image
encryption techniques. This paper proposes a new approach for image
encryption based on a high-dimensional chaotic map. The new scheme
employs the Cat map to shuffle the positions, then to confuse the
relationship between the cipher-image and the plain-image using the
high-dimensional Lorenz chaotic map preprocessed. The results of
experimental, statistical analysis and key space analysis show that
the proposed image encryption scheme provides an efficient and secure
way for real-time image encryption and transmission. 相似文献
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