In this paper, a kind of digital signature is presented, which is based on the Lorenz chaotic system and the four step cell neuron net (CNN) hyperchaotic system. The digital signature of Chinese document is realized.

• 文中提出了基于Lorenz混沌系统和四阶细胞神经网络(CNN)超混沌系统的数字签名方法,实现了对中文文档的数字签名。