一种基于混沌和密钥交换的流加密算法

Stream Ciphers Algorithm Based on Chaos and Key Exchange

传统的流加密算法,存在密钥分发和管理以及加密强度不高两大难题。在本文中,利用混沌及密钥交换的思想,提出了一种新颖的流加密算法。该算法首先由密钥交换得到混沌初始值,再由混沌映射和明文进行有机结合,生成密钥流,然后与明文进行按位异或运算,得到密文。由于混沌加密能够有效的提高加密强度,同时密钥交换可以很好的解决密钥分发和管理的难题。因此,该算法能够改善传统流加密算法中存在的两大难题。

The distribution and management of the keys and the low security are two main problems in the traditional stream ciphers. In this paper, we present a novel method of stream ciphers based on chaos and key exchange. In this method, we obtain the original value by the key exchange, then produce the stream of keys by Logistic map and the text itself, then XOR the text in bit with the stream of keys, and get the cipher at last. It is shown that the proposed algorithm greatly improves the distribution and management of the keys and the low security.