Novel image scrambling algorithm based on changing pixel values
基于单一像素值改变的图像置乱新算法

Aiming at the safe problem of digital image transmission, this paper presented a new image scrambling algorithm based on changing the pixel values. The algorithm improved the Vigenere encryption algorithm, made it can be applied in the digital image encryption. Experimental result shows that, the image which is encrypted by this algorithm has a high safety, compared with the traditional image scrambling algorithm based on changing the single pixel. The method has a better ability of resist noise, it also has better flexibility, it can encrypt any size of digital images. The scrambling degree of the encrypted image has the close relationship with the choice of keyword, and it can encrypt any size of digital images. So the above superiorities of this algorithm make it suitable for digital image of the network transmission process, and other fields which have higher safety requirements for digital images.