Novel hyperchaos-based scrambling and plaintext pixel dynamic correlation image encryption method
An encryption method and plaintext image technology, which is applied to encryption devices with shift registers/memory, image coding, image data processing, etc., can solve the problem that the key stream cannot resist known plaintext attacks and chosen plaintext attacks, and the chaotic interval is narrow , small key space and other issues, to achieve the effect of enhancing the ability of chosen plaintext attack, reducing computational complexity, and improving utilization rate
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[0087] Example 1
[0088] like figure 1 As shown, a new image encryption method associated with the dynamic dynamic dynamic dynamic dynamic dynamic, including the present invention, including the following steps:
[0089] S1, Image Encryption Algorithm: First, create a chaotic sequence for a chaos, ordering sequencing of the image pixel in order to form a chaos of the image pixel; then convert the image into a one-dimensional with M * N elements Sequence; Finally, according to the previous pixel value, determine the position number of the current pixel;
[0090] S2, key generation: During the process of generating a key, the HASH algorithm SHA256 is used, and the generated key is a dynamic key, the length of the key K is 256 bits, and the height is related to the express text, based on the key K, design The intermediate variable generates the initial value of the FL-NCHM. After generating the initial condition, it can obtain the chaotic sequence needed to have a chaos and diffusio...
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