In order to study the digital image transmission in communication security issues
a modified color image encryption algorithm based on hyper-chaos system was put forwarded in this letter.It firstly made use of the improvement of the Logistic map to scramble the pixel value of the R
G
B of colored image
then used a hyper-chaotic system to confuse the relationship between the plain-image and the cipher-image.MALAB7.0 is used for simulation.There is no rule among the cipher-text and completely different from the original image.Simulation results indicate that
the suggested encryption algorithm of image has the advantages of large key space and high efficiency and security