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针对流密码HC-256＇的区分攻击
  • ISSN号：1009-5896
  • 期刊名称：《电子与信息学报》
  • 时间：0
  • 分类：TN918.1[电子电信—通信与信息系统;电子电信—信息与通信工程]
  • 作者机构：[1]西安电子科技大学计算机网络与信息安全教育部重点实验室,西安710071
  • 相关基金：国家973计划项目（2007CB311201）; 保密通信国防科技重点实验室基金（9140C110201110C1102）; 国家自然科学基金（60970119 60833008）; 西安建筑科技大学青年基金（QN1024）资助课题
作者： 李顺波[1], 胡予濮[1], 王艳[1]
关键词： 密码分析, 流密码, 区分攻击, eSTREAM, HC-256, Cryptanalysis, Stream cipher, Distinguishing attack, eSTREAM, HC-256
中文摘要：

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。

英文摘要：

Stream cipher HC-256＇ is an improved algorithm of HC-256 which is proposed as a candidate to the eSTREAM project.Until now,there has not any cryptanalysis on HC-256＇.In this paper,a linear distinguishing attack on HC-256＇ is presented.This method uses different nonlinear functions instead of state update functions to exploit the weaknesses in the even positions output bits of the keystream generation sequence.By linear approximation to the internal state bits,a distinguisher is built.The result shows that there needs about 281 2 bit keystream with advantage 0.9545 to distinguish HC-256＇ form random sequence.Thereby,this is a beneficial attempt to solve a problem which is given by Sekar et al in IWSEC 2009.

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期刊信息
  • 《电子与信息学报》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国科学院电子学研究所 国家自然科学基金委员会信息科学部
  • 主编：朱敏慧
  • 地址：北京市北四环西路19号
  • 邮编：100190
  • 邮箱：jeit@mail.ie.ac.cn
  • 电话：010-58887066
  • 国际标准刊号：ISSN：1009-5896
  • 国内统一刊号：ISSN：11-4494/TN
  • 邮发代号:2-179
  • 获奖情况:
  • 国内外数据库收录:
  • 荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:24739