基于Camellia的跳频序列快速产生方法研究

摘要

作为21世纪欧洲NESSIE密码工程分组密码算法标准,Camellia算法具有很高的安全性和广泛的适用性.以Camellia算法为核心部件,从部分轮函数F中提取4 Bytes的中间状态作为样本序列输出,设计了一种新的跳频序列产生器,并分析了它的相关特性.分析研究表明,该方法产生的样本序列不仅跳频特性好,而且序列产生速度高达Camellia算法加密速度的2.5倍,跳频码产生速度高达每秒4.3万个,同时安全性高,可以应用于高速跳频通信系统中.%As the block-cipher encryption standard of European NESSIE,Camellia algorithm has very good security and wide application.Based on Camellia algorithm,a novel fast generation of frequency hopping(FH) sequence is proposed.The main idea is to extract parts of the internal state at certain round function F and take them as the output keystream.The relative characteristics of the proposed algorithm are analyzed,and the result shows that the sample sequence has better FH characteristics and higher security.The generation speed of the FH sequences is 43 thousand bytes per second,about 2.5 times faster than that with Camellia.The proposed algorithm can be applied to the high speed FH communication system.