Conference paper ยท Book chapter
Improved Impossible Differential Attacks on Large-Block Rijndael
In this paper, we present more powerful 6-round impossible differentials for large-block Rijndael-224 and Rijndael-256 than the ones used by Zhang et al. in ISC 2008. Using those, we can improve the previous impossible differential cryptanalysis of both 9-round Rijndael-224 and Rijndael-256. The improvement can lead to 10-round attack on Rijndael-256 as well.
With 2198.1 chosen plaintexts, an attack is demonstrated on 9-round Rijndael-224 with 2 195.2 encryptions and 2140.4 bytes memory. Increasing the data complexity to 2216 plaintexts, the time complexity can be reduced to 2130 encryptions and the memory requirements to 2 93.6 bytes. For 9-round Rijndael-256, we provide an attack requiring 2229.3 chosen plaintexts, 2194 encryptions, and 2 139.6 bytes memory.
Alternatively, with 2245.3 plaintexts, an attack with a reduced time of 2127.1 encryptions and a memory complexity of 290.9 bytes can be mounted. With 2244.2 chosen plaintexts, we can attack 10-round Rijndael-256 with 2253.9 encryptions and 2186.8 bytes of memory.
Language: | English |
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Publisher: | Springer |
Year: | 2013 |
Pages: | 126-140 |
Proceedings: | 15th Annual International Conference on Information Security and Cryptology (ICISC 2012)International Conference on Information Security and Cryptology |
Series: | Lecture Notes in Computer Science |
Journal subtitle: | 15th International Conference, Seoul, Korea, November 28-30, 2012, Revised Selected Papers |
ISBN: | 3642376819 , 3642376827 , 9783642376818 and 9783642376825 |
ISSN: | 03029743 and 16113349 |
Types: | Conference paper and Book chapter |
DOI: | 10.1007/978-3-642-37682-5_10 |
ORCIDs: | Bogdanov, Andrey |