一种新的简化AES中间相遇攻击方法

• 作 者: 董晓丽 胡予濮 韦永壮 陈杰
• 机 构: Key Lab. of Computer Networks & Information Security, Ministry of Education, Xidian University, Xi’a
• 出 处: 中国通信
• 发表日期: 2011年2期
• 关键词: AES Rijndael cryptanalysis meetin-the-middle attack

A new 5-round distinguisher of AES with key whitening is presented by using the properties of its round transformation. Based on this distinguisher, we present new meet-in-the -middle attacks on reduced AES considering the key schedule and the time-memory tradeoff approach. New attacks improve the best known meet-in-the-middle attacks on reduced AES presented at FSE2008.We reduce the time complexity of attacks on 7-round AES-192 and 8-round AES-256 by a factor of at least 28. Moreover, the distinguisher can be exploited to develop the attack on 8-round AES-192.