Collision-Integral Attack of Reduced-Round FOX

WU Wen-ling; WEI Hong-ru

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Collision-Integral Attack of Reduced-Round FOX

更新时间：2025-07-16

- Collision-Integral Attack of Reduced-Round FOX
- Acta Electronica Sinica Vol. 33, Issue 7, Pages: 1307-1310(2005)
- 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. 北京科技大学应用科学学院,北京,100083
  3. 中国科学院软件研究所信息安全国家重点实验室北京,100080
  4. 北京科技大学应用科学学院北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391
- Published：2005
- 稿件说明：
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WU Wen-ling, WEI Hong-ru. Collision-Integral Attack of Reduced-Round FOX[J]. Acta Electronica Sinica, 2005, 33(7): 1307-1310.
DOI：

WU Wen-ling, WEI Hong-ru. Collision-Integral Attack of Reduced-Round FOX[J]. Acta Electronica Sinica, 2005, 33(7): 1307-1310. DOI：

摘要

FOX是最近推出的系列分组密码

它的设计思想基于可证安全的研究结果

且在各种平台上的性能优良.本文利用碰撞攻击和积分攻击相结合的技术分析FOX的安全性

结果显示碰撞-积分攻击比积分攻击有效

攻击对4轮FOX64的计算复杂度是2

45.4

对5轮FOX64的计算复杂度是2

109.4

对6轮FOX64的计算复杂度是2

173.4

对7轮FOX64的计算复杂度是2

237.4

且攻击所需数据量均为2

;也就是说4轮FOX64/64、5轮FOX64/128、6轮FOX64/192和7轮FOX64/256对本文攻击是不免疫的.

Abstract

FOX are a family of block ciphers presented recently

which are based upon some results on proven security and have high performances on various platforms.In this paper

we construct some distinguishers between 3-round FOX and a random permutation of the blocks space.By using collision-searching techniques and integral attack

the distinguishers are used to attack on 4

6 and 7 rounds of FOX64.The four subkeys of 4-round FOX64 can be recovered with 2

chosen plaintexts and 2

45.4

encryptions.The five subkeys of 5-round FOX64 can be recovered with 2

chosen plaintexts and 2

109.4

encryptions.The six subkeys of 6-round FOX64 can be recovered with 2

chosen plaintexts and 2

173.4

encryptions.The seven subkeys of 7-round FOX64 can be recovered with 2

chosen plaintexts and 2

237.4

encryptions.Therefore

4-round FOX64/64

5-round FOX64/128

6-round FOX64/192 and 7-round FOX64/256 are not immune to Collision-Integral attack.

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