【作者】 董丽华； 曾勇； 胡予濮；

【Author】 DONG Li-hua,ZENG Yong,HU Yu-pu (Key Lab.of Computer Network and Information Security of the Ministry of Education,Xidian University,Xi’an Shaanxi 710071,China)

【机构】 西安电子科技大学计算机网络与信息安全国家教育部重点实验室；

【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。更多还原

【Abstract】 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.更多还原