Abstract: The secure transmission and storage of image is of great significance in the digital image security domain. In order to better protect digital image, this paper designs a chaotic image ...

Abstract: The potential of discrete memristors to improve chaotic systems for safe communication has been demonstrated by recent advancements. This paper presents a novel four-dimensional (4D) ...

1. 将图像展平为numpy数组。 2. 对密钥计算sha512值，将结果以每两个字符为单位组合，并分别转为0-255的十进制数，接入nums列表。 3. 取第一次sha512计算结果继续计算其sha512值，执行第2步，同样接入nums列表，重复直到nums长度不小于数组长度，随后将其超出数组长度 ...

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