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针对流密码HC-256'的区分攻击 被引量:2
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作者 李顺波 胡予濮 王艳 《电子与信息学报》 EI CSCD 北大核心 2012年第4期807-811,共5页
流密码HC-256'是eSTREAM计划候选密码HC-256的改进算法,至今未见关于HC-256'的安全性分析结果。该文提出了一种针对HC-256'的线性区分攻击,利用不同的非线性函数代替内部状态更新函数来寻找偶数位置上密钥流生成序列的弱点... 流密码HC-256'是eSTREAM计划候选密码HC-256的改进算法,至今未见关于HC-256'的安全性分析结果。该文提出了一种针对HC-256'的线性区分攻击,利用不同的非线性函数代替内部状态更新函数来寻找偶数位置上密钥流生成序列的弱点,通过线性逼近HC-256'的内部状态构造区分器。分析结果表明,需要约2 281bit,就能以0.9545的区分优势对密钥流进行区分。同时,该攻击为解决Sekar等人在2009年IWSEC会议上提出的问题进行了有益的探索。 展开更多
关键词 密码分析 流密码 区分攻击 eSTREAM hc-256
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针对访问驱动cache攻击HC-256算法的改进
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作者 郑继森 谭晓青 +1 位作者 莫庆平 贺婵 《计算机应用研究》 CSCD 北大核心 2011年第6期2224-2226,共3页
为了使HC-256可以防御访问驱动cache攻击,对HC-256算法进行了改进。在HC-256中加入完全随机排序算法,对表P和表Q进行扰乱,这样使用变化的表代替固定的S盒,使得攻击者获得的输入和输出都是不安全的,有效地防御了此访问驱动cache攻击。
关键词 访问驱动cache攻击 流密码 hc-256 随机排序 算法改进
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Variant Map System to Simulate Complex Properties of DNA Interactions Using Binary Sequences 被引量:1
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作者 Jeffrey Zheng Weiqiong Zhang +2 位作者 Jin Luo Wei Zhou Ruoyu Shen 《Advances in Pure Mathematics》 2013年第7期5-24,共20页
Stream cipher, DNA cryptography and DNA analysis are the most important R&D fields in both Cryptography and Bioinformatics. HC-256 is an emerged scheme as the new generation of stream ciphers for advanced network ... Stream cipher, DNA cryptography and DNA analysis are the most important R&D fields in both Cryptography and Bioinformatics. HC-256 is an emerged scheme as the new generation of stream ciphers for advanced network security. From a random sequencing viewpoint, both sequences of HC-256 and real DNA data may have intrinsic pseudo-random properties respectively. In a recent decade, many DNA sequencing projects are developed on cells, plants and animals over the world into huge DNA databases. Researchers notice that mammalian genomes encode thousands of large noncoding RNAs (lncRNAs), interact with chromatin regulatory complexes, and are thought to play a role in localizing these complexes to target loci across the genome. It is a challenge target using higher dimensional visualization tools to organize various complex interactive properties as visual maps. The Variant Map System (VMS) as an emerging scheme is systematically proposed in this paper to apply multiple maps that used four Meta symbols as same as DNA or RNA representations. System architecture of key components and core mechanism on the VMS are described. Key modules, equations and their I/O parameters are discussed. Applying the VM System, two sets of real DNA sequences from both sample human (noncoding DNA) and corn (coding DNA) genomes are collected in comparison with pseudo DNA sequences generated by HC-256 to show their intrinsic properties in higher levels of similar relationships among relevant DNA sequences on 2D maps. Sample 2D maps are listed and their characteristics are illustrated under controllable environment. Visual results are briefly analyzed to explore their intrinsic properties on selected genome sequences. 展开更多
关键词 PSEUDO-RANDOM Number Generator STREAM CIPHER hc-256 Binary to DNA Pseudo DNA Sequence Large Noncoding DNA Analysis 2D MAP Visual Distribution VARIANT MAP System
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Pseudo DNA Sequence Generation of Non-Coding Distributions Using Variant Maps on Cellular Automata
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作者 Jeffrey Zheng Jin Luo Wei Zhou 《Applied Mathematics》 2014年第1期153-174,共22页
In a recent decade, many DNA sequencing projects are developed on cells, plants and animals over the world into huge DNA databases. Researchers notice that mammalian genomes encoding thousands of large noncoding RNAs ... In a recent decade, many DNA sequencing projects are developed on cells, plants and animals over the world into huge DNA databases. Researchers notice that mammalian genomes encoding thousands of large noncoding RNAs (lncRNAs), interact with chromatin regulatory complexes, and are thought to play a role in localizing these complexes to target loci across the genome. It is a challenge target using higher dimensional tools to organize various complex interactive properties as visual maps. In this paper, a Pseudo DNA Variant MapPDVM is proposed following Cellular Automata to represent multiple maps that use four Meta symbols as well as DNA or RNA representations. The system architecture of key components and the core mechanism on the PDVM are described. Key modules, equations and their I/O parameters are discussed. Applying the PDVM, two sets of real DNA sequences from both the sample human (noncoding DNA) and corn (coding DNA) genomes are collected in comparison with two sets of pseudo DNA sequences generated by a stream cipher HC-256 under different modes to show their intrinsic properties in higher levels of similar relationships among relevant DNA sequences on 2D maps. Sample 2D maps are listed and their characteristics are illustrated under a controllable environment. Various distributions can be observed on both noncoding and coding conditions from their symmetric properties on 2D maps. 展开更多
关键词 Large Noncoding DNA Analysis Stream CIPHER hc-256 Binary to DNA PSEUDO DNA Sequence Visual Distribution VARIANT Map
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