Research And Application Of Cryptographic Algorithm Based On Chaos

With the rapid development of computer technology,information has become one of the important strategic resources in the social development and its role and status is becoming increasingly important.However,network security technology can be the driving force of social development.Therefore,the information security and network security has become a vital issue in the information society.Chaos is a ubiquitous phenomenon.It reveals the unity of certainty and randomness and the unity of disorder and order,which are the common attributes of nonlinear system.With the deepening and extension of chaos theory,its application has already become attention and research focus of many scholars at home and abroad.Based on chaos theory,this paper mainly studies the application of data encryption algorithm,image encryption algorithm and one-time password authentication algorithm.The details are as follows:Firstly,the paper not only discusses the development history,current research situation and development prospects of chaos theory,but also elaborates its definition and characteristics.Besides,it analyzes the typical chaotic system and designs a text encryption algorithm based on chaotic sequence,during which the algorithm is implemented and the desired goal can be achieved.Secondly,the paper explains the research status and characteristics of chaotic image encryption.And it also expounds a kind of image encryption in spatial by using indirect encryption book.In order to improve the efficiency of compression,the method of combining JPEG and compression algorithm is proposed to design the algorithm of frequency domain encryption.Finally,the paper expounds the requirements and methods of identity authentication system and analyzes the existing problems and the solution of authentication algorithm.Then,it put forwards an authentication algorithm,which can use one-time password of chaos theory and write programs to attain the desired purpose.