Encryption Algorithm Based on New Composite Chaos Dynamics System
Chaos defined in general in quantitative characteristics is not a strict definition .In this paper two new chaos functions are proposed and theoretical proof about chaos is finished based on a strict Devaney definition. Using composite chaotic system character, a composite chaos sequences cipher algorithm is designed, which map have uniform distribution function and -like self-correlation, and can produce balance nature series to 0-1 after quantified. The unchanged probability of composite chaos makes ciphertext has a good random. As the sensitivity to initial condition and random nature to iterative function choice, key and plaintext and ciphertext form complex and sensitive nonlinear relations, and the correlation is very small. The leaking of ciphertext to key and plaintext information can effectively be prevented. The experimental result show that the system has a very high safety and the key space is expanded.
Composite chaos nonlinear dynamics system Encryption algorithm Devaney definition
TONG Xiao-jun CUI Ming-gen
School of Computer Science and Engineering, Harbin Institute of Technology, Weihai, 264209,PR China College of Science, Harbin Institute of Technology, Weihai, 264209,PR China
国际会议
上海
英文
2007-09-21（万方平台首次上网日期，不代表论文的发表时间）