Improved Impossible Differential Cryptanalysis of SMS4

The SMS4 is the first commercial block cipher published by Chinese government. It's a 32-round block cipher encrypted by 128-bit keys. By analyzing the changes of the difference between input and output pairs in each round, this paper presents a new impossible differential path of the 14-round...

Full description

Saved in:
Bibliographic Details
Main Authors: Tao Shi, Wei Wang, Qiuliang Xu
Format: Conference Proceeding
Language:English
Subjects:
block cipher
Educational institutions
impossible differential attack
SMS4
Wireless LAN
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The SMS4 is the first commercial block cipher published by Chinese government. It's a 32-round block cipher encrypted by 128-bit keys. By analyzing the changes of the difference between input and output pairs in each round, this paper presents a new impossible differential path of the 14-round SMS4. Using this path, a new method is submitted to crypt analyze an 18-round SMS4. The time complexity of the attack is 2 117:06 partial encryptions.
DOI:10.1109/CIS.2012.116