中文摘要：

对新提议的一种基于线性反馈移位寄存器、非线性反馈移位寄存器和过滤布尔函数的序列密码结构的安全性进行了研究，对这种结构给出了一种区分攻击，举例子说明了此攻击的有效性，这种新的攻击表明，此种新的序列密码结构存在潜在的安全弱点。

英文摘要：

This paper studies the security of a newly proposed stream cipher structure based on linear feedback shift register, nonlinear feedback shift register and filter Boolean functions. A distinguishing attack on this structure is presented. An example is illustrated to show the effectiveness of this attack. This new attack suggests that this new stream cipher structure has potential security weakness.