Simulation Research on a Kind of Image Hybrid Encryption Algorithm
Wentao Ma · 2012
Image encryption can ensure the safe transmission of image data in the network.In this paper,an image encryption and decryption algorithm was presented based on scrambling of low-frequency coefficient matrix of wavelet domain and pixels alternative on airspace domain.It was combined with the characteristics of transform domain and the airspace encrypted scheme.During encryption process,two kinds of classical chaotic models were used to generate the matrix of key flow and desig two kinds of reversible transforms based on XOR and mod to do scrambling and replacing operation.It makes the encryption process clear and operation easier,at the same time,improves the efficiency of encryption by using the modular thought and parallel encryption.Through the simulation test,the encryption algorithm was applied in color images,and attained ideal effect of encryption.Finally,the analysis of encryption performance shows that it can meet the requirements of the image information security transfer for encryption algorithm,including the factors such as bigger key space,capacity of strong resistance statistical analysis and malicious attacks and so on.These capacity can ensure the transmission of image data without hidden dangers.