Paper Info
Title
New impossible differential attacks on camellia
Abstract
Camellia is one of the most worldwide used block ciphers, which has been selected as a standard by ISO/IEC. In this paper, we propose several new 7-round impossible differentials of Camellia with 2 FL/FL−1 layers, which turn out to be the first 7-round impossible differentials with 2 FL/FL−1 layers. Combined with some basic techniques including the early abort approach and the key schedule consideration, we achieve the impossible differential attacks on 11-round Camellia-128, 11-round Camellia-192, 12-round Camellia-192, and 14-round Camellia-256, and the time complexity are 2123.8, 2121.7, 2171.4 and 2238.3 respectively. As far as we know, these are the best results against the reduced-round variants of Camellia. Especially, we give the first attack on 11-round Camellia-128 reduced version with FL/FL−1 layers.
Year
DOI
Venue
2011
10.1007/978-3-642-29101-2_6
ISPEC
Keywords
DocType
Volume
basic technique,impossible differential attack,11-round camellia-128,7-round impossible differential,new impossible differential attack,best result,11-round camellia-192,early abort approach,14-round camellia-256,12-round camellia-192,11-round camellia-128 reduced version
Journal
2011
Issue
Citations 
PageRank 
null
7
0.49
References 
Authors
17
2
Name
Order
Citations
PageRank
Dongxia Bai1213.94
Leibo Li2807.00