Security on Korean Encryption Standard

WU Wen-ling; MA Heng-tai; FENG Deng-guo

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Security on Korean Encryption Standard

更新时间：2025-07-16

- Security on Korean Encryption Standard
- Acta Electronica Sinica Vol. 31, Issue 4, Pages: 585-588(2003)
- 作者机构：
  
  1. 中国科学院软件研究所信息安全国家重点实验室,北京,100080
  2. 中国科学院信息安全技术工程研究中心,北京,100080
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391
- Published：2003
- 稿件说明：
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WU Wen-ling, MA Heng-tai, FENG Deng-guo. Security on Korean Encryption Standard[J]. Acta Electronica Sinica, 2003, 31(4): 585-588.
DOI：

WU Wen-ling, MA Heng-tai, FENG Deng-guo. Security on Korean Encryption Standard[J]. Acta Electronica Sinica, 2003, 31(4): 585-588. DOI：

摘要

SEED是韩国的数据加密标准

设计者称用线性密码分析攻击SEED的复杂度为2

335.4

而用本文构造的15轮线性逼近攻击SEED的复杂度为2

328

.为了说明SEED抵抗差分密码分析的能力

设计者首先对SEED的变体SEED

做差分密码分析

指出9轮SEED*对差分密码分析是安全的;利用SEED

的扩散置换和盒子的特性

本文构造SEED

的9轮截断差分

因此10轮SEED

对截断差分密码分析是不免疫的.本文的结果虽然对SEED的实际应用构成不了威胁

但是显示了SEED的安全性并没有设计者所称的那样安全.

Abstract

SEED is the Korean encryption standard.It was pointed by designers that the complexity for the linear cryptanalysis of SEED is 2

335.4

.Using the linear approximations in this paper

the complexity for the linear cryptanalysis of SEED is 2

328

.To analyze the differential cryptanalysis of SEED

the modified SEED was considered.It was pointed out that 9-round modified SEED was secure against the differential cryptanalysis.There are 9-round truncated differentials available to the truncated differential cryptanalysis in the modified SEED.Hence

10-round modified SEED is not immune to truncated differential cryptanalysis.Although the results can not threaten the application of SEED

they show the security of SEED is not as strong as that designers predicted.

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