Abstract: This paper proposes a new kind of stream cipher encryption algorithm that is based on the Logistic chaos mapping.And this algorithm describes a new method of chaos disturbance using the random properties of chaos system.Through encoding algorithm and on the basis of the numeralization of chaos random sequence，a new non-linear transformation algorithm is introduced in order to resist various attacks of the chaotic stream cipher system.The statistical tests and related analysis prove that the key series has high complexity and good cipher quality.The entire encryption system has long period and good flexibility，the encryption model can be extended to other more complex chaos systems.

摘要： 提出了一种基于Logistic混沌映射的流密码算法，该算法利用混沌本身所具有的随机特性，提出了一种新的对混沌系统扰动的方法。通过编码算法以及在混沌随机序列数字化的基础上引入一种新的非线性变换算法，以抵抗对混沌流密码系统的各种攻击。经统计测试和相关分析，密钥序列具有较高的线性复杂度和良好的密码学特性。整个加密系统的周期性大、灵活性好，加密模型还可以推广到其他混沌系统。