Cryptanalysis of the Vesta-2M stream cipher

GUAN Jie

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Cryptanalysis of the Vesta-2M stream cipher

更新时间：2024-10-14

- Cryptanalysis of the Vesta-2M stream cipher
- Issue 7, Pages: 150-154(2003)
- 作者机构：
  
  解放军信息工程大学电子技术学院,河南,郑州,450004
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN918.2
- Published：2003
- 稿件说明：
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[1]关杰.Vesta-2M流密码的密码分析[J].通信学报,2003(07):150-154.

GUAN Jie. Cryptanalysis of the Vesta-2M stream cipher[J]. 2003, (7): 150-154.
[1]关杰.Vesta-2M流密码的密码分析[J].通信学报,2003(07):150-154. DOI：

GUAN Jie. Cryptanalysis of the Vesta-2M stream cipher[J]. 2003, (7): 150-154. DOI：

摘要

分析了俄国商用密码Vesta-2M流密码的安全性。流密码Vesta-2M的密钥流发生器的初始密钥规模为)2（536O。本文指出文献[1]中攻击方法的错误

并提出一种已知明文攻击方法

所需明文量很小（约几百比特）

计算复杂度的上界为）2(372O。1

Abstract

The security of stream cipher Vesta-2M used in commercial products in Russia is analyzed. The size of the initial key of the keystream generator of stream cipher Vesta-2M is)2（536O. The author point out the mistake of attack introduced by the paper [1]

and introduce a known plaintext attack method where only a small segment of known plaintext（about hundreds of bits）

the upper bound of the compute complexity is）2(372O.

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