Image Encryption Algorithm Based on Matrix Kronecker Product
Shu Qing · Microcomputer Information · 2010
In order to improve the shortcomings of recovering encrypted image after high-dimensional matrix transform on plain image,a chaotic encryption algorithm based on matrix kronecker product is proposed.By kronecker product of matrices,two chaotic sequences generated by the Logistic maps and Chebyshev map respectively are adopted to generate a scrambling matrix to disorder the pixel coordinates of the plaintext image:Furthermore,a high dimensional invertible matrix is generated by kronecker product of some lower dimensional invertible matrices in a ring,then the scrambling image is performed high dimensional matrix transformation to encrypt encrypted image again.Simulation results show the algorithm applies successfully high-dimensional matrix transform to image encryption and decryption,and possesses the features of high-performance characteristic of encryption,key sensitivity,huge keyspace which increases security.