Research&Implementation Of Multi-media Encryption With Fractional Order Complex Lorenz Chaotic System Based On Android Platform

Since Alexander Graham Bell developed the first telephone in the world in 1875,and now China has fully entered 4G and is committed to the development of 5G,modern communication technology has changed dramatically.And as a terminal for communication technology,the development of cell phones is also changing rapidly.Today,the mobile communication terminals based on Android operating system have more market share than that of PC,and smartphones have slowly been the cornerstone and hub of the "interconnectivity".Heavy use of smartphones has led to threats to data security.The phenomenon that personal privacy data,including photos,audio,video has been illegally tampered and stolen is increasingly serious.With the continuous study of chaos theory and cryptography,it is found that there is a natural connection and similarity between them,thus how to combine chaos encryption with practical application becomes a new hotspot.In view of the current situation of mobile multimedia data security,this thesis adopts a chaotic encryption scheme based on the Android mobile phone platform,which realizes the encryption and decryption of digital images,audio and video,and it is committed to solving the problem of Android mobile data security.Based on the analysis of MATLAB simulation experiment,this thesis puts forward the method of fractional order complex Lorenz chaotic system as the main technology,and combines with other chaotic systems to apply the concrete scheme of mixed encryption.We not only demonstrate the feasibility by experiment,but also compare and analyze its advantages,and then implement the method on the Android platform.The experimental results show that the algorithm of data encryption on the Android platform by using the fractional order complex Lorenz chaotic system as the main technical support has achieved good effect.Compared with the encryption algorithm based on fractional Lorenz chaotic system or integer complex Lorenz chaotic system,the algorithm implemented in this thesis is relatively stronger and safer against statistical analysis attacks.