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中文摘要：
当前，由于还没有一个适于一般目的的流密码国际加密标准，流密码的设计与分析引起了广泛关注。在以前的流密码的设计中多采用线性反馈移位寄存器（LFSR）作为基本的部件。然而由于LFSR本身的线性性，基于LFSR的流密码备受攻击，进而相继出现了一些替换部件，例如T函数，带进位的反馈移位寄存器（FCSR）等等。文中给出了一个新的基于FCSR的密钥流生成器。理论分析表明该密钥流生成器具有高度的安全性。NIST统计测试表明该密钥流生成器的伪随机特性是理想的。
英文摘要：
Since there are no general-purpose international stream cipher encryption standards, much attention has been paid to the design and analysis of stream cipher. Previously, the linear feedback shift register （LFSR） has been widely used as a basic design component. However, quite a few LFSR-based proposals have withstood cryptanalysis for its inherent linear structure. As a result, some alternative constructions have been proposed, such as T function, Feedback with Carry Shift Registers （FCSR） and so on In this paper, a novel FCSR-based stream sequence generator is proposed. Theoretic analysis shows that the proposed keystream generator has high security. And the NIST statistical test indicates that the pseudo-random properties of this novel keystream generator are realtively ideal.
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