An algorithm of digital image encryption based on Arnold transformation
Jian Zhang · Optical Technique · 2009
A digital image encryption algorithm is presented based on Arnold transformation.The traditional Arnold transformation is improved by adding two parameters a and b,furthermore the Logistic map is used to generate the parameter sequences.The digital image is blocked and the Arnold transformation with different parameters is carried out on each image block of the digital image,thus image location scrambling is achieved.In addition the Arnold transformation is extended to multi-dimensional then used on the image gray scrambling,so as to construct an algorithm combine both the position scrambling and the gray scrambling. The results of simulation show that this algorithm can achieve good image encryption effect.And it has a large key space,key sensitivity and many other advantages such as withstand statistical and known expressly attack.It basically meets the effectiveness and security requirements of image encryption.