Design And Implementation Of A Voice Encryption System Based On Android

With the development of network communication technology,the transmission of multimedia information such as images,voices,and videos in smart phones is facing serious information security problems in the network.Based on this,this article designs a voice encryption system based on Android.This paper analyzes the theoretical basis,design framework,software implementation of chaos and SM series algorithms.A double chaotic encryption algorithm based on Logistic mapping and Henon mapping is designed.At the same time,in order to improve the problem that the key CK in the SM4 key expansion algorithm is generated by a fixed value,chaotic mapping is introduced to improve the key expansion algorithm in SM4,and Realized voice encryption.At the same time,the above two algorithms are compared and analyzed,and it is decided to choose an improved SM4 encryption algorithm with higher security for use in the system.At the same time,the system is implemented on the Android platform,and a series of system tests have been conducted on it.The test results are good,indicating that This system can realize voice encrypted call function and has good performance.