The detail is clarified as follows : l ) based on the chaotic technology and contemporary encryption approach the paper put forward a new chaotic sequence , which introduced the m - sequence and the method of shrink key - the stream generator . the complexity of the sequence was promoted as the random alteration of the parameters of chaotic mapping , and at the same time , the shrinking key was used to enhance the security further more ; 2 ) the performance of one - way hash function was improved and new hash function construction methods are proposed through a novel hash method based on chaotic mapping and the aes - the rijndael algorithm . the algorithm of hashing messages of arbitrary length into 256 bits hash values was designed 按照這種方法,輸出序列的周期性得以大大提高,理論分析和計算機(jī)模擬結(jié)果表明,該方法可以產(chǎn)生具有良好統(tǒng)計特性的密鑰流,而且易于軟硬件實現(xiàn): 2 )實現(xiàn)了一種基于混沌映射和分組密碼rijndael算法的單向hash函數(shù)的構(gòu)造方法,即使用logistic混沌映射產(chǎn)生混沌二值序列,序列的分組與明文序列分組進(jìn)行按位異或后,進(jìn)入rijndael加密模塊,所得的結(jié)果再加入到反饋端,參與下一分組輸入的異或運算,迭代結(jié)束時的rijndael加密結(jié)果即為所求的hash函數(shù)值。