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首页> 外文会议>4th ACM symposium on information, computer and communications security 2009 >A Note on Cook's Elastic Block Cipher
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A Note on Cook's Elastic Block Cipher

机译：关于库克弹性块密码的注记

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摘要

"VIL Block Cipher" is a kind of block cipher that supports Variable Input-Lengths. It was first proposed by Bellare, etc. and since then several constructions have been given, among which Cook's elastic block cipher is a special one. In this paper we present a security model called "MIL model" for VIL block ciphers, investigating their security when a fixed secret key is used for multiple input-lengths. Our results show that if the key schedule is not well designed, Cook's elastic block cipher is vulnerable when processing multiple-length inputs under a fixed secret key. Thus, further considerations are needed to use Cook's elastic block cipher safely in practice.
机译：“ VIL分组密码”是一种支持可变输入长度的分组密码。它是由Bellare等人首先提出的，此后又给出了几种构造，其中Cook的弹性分组密码是一种特殊的构造。在本文中，我们提出了一种针对VIL分组密码的安全模型，称为“ MIL模型”，研究了将固定密钥用于多个输入长度时的安全性。我们的结果表明，如果密钥时间表设计不当，则在固定密钥下处理多长度输入时，库克的弹性分组密码很容易受到攻击。因此，在实践中需要进一步考虑安全使用库克的弹性分组密码。

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  • 来源
  • 会议地点 Sydney(AU);Sydney(AU)
  • 作者

    Liting Zhang; Wenling Wu; Lei Zhang; Yanjun Li;

  • 作者单位

    State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences, Beijing, China;

    State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences, Beijing, China;

    State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences, Beijing, China;

    State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences, Beijing, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 安全信息论;
  • 关键词

    variable-input-length block cipher; security model; elastic block cipher; pseudorandomness;

    机译：输入长度可变的分组密码；安全模型；弹性分组密码伪随机性;

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