@inproceedings{18c241c66a264cc3ab69c64b35251aa9,
title = "Related-key differential attacks on Cobra-S128, Cobra-F64a, and Cobra-F64b",
abstract = "Data-dependent permutations (DDPs) which are very suitable for cheap hardware implementations have been introduced as a cryptographic primitive. Cobra-S128 and Cobra-F64 (which is a generic name for Cobra-F64a and Cobra-F64b) are 128-bit and 64-bit iterated block ciphers with a 128-bit key size based on such DDPs, respectively. Unlike the predecessor DDP-based ciphers [16,5], Cobra-8128 is a software-oriented cipher and Cobra-F64 is a firmware-suitable cipher. In this paper, we derive several structural properties of Cobra-8128 and Cobra-F64 and then use them to devise key recovery attacks on Cobra-8128 and Cobra-F64. These works are the first known attacks on Cobra-8128 and Cobra-F64.",
keywords = "Block Cipher, Cobra-F64, Cobra-S128, Data-Dependent Permutation, Related-Key Attack",
author = "Changhoon Lee and Jongsung Kim and Seokhie Hong and Jaechul Sung and Sangjin Lee",
year = "2005",
doi = "10.1007/11554868_18",
language = "English",
isbn = "3540289380",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "244--262",
booktitle = "Progress in Cryptology - Mycrypt 2005 - First International Conference on Cryptology in Malaysia, Proceedings",
address = "Germany",
note = "1st International Conference on Cryptology in Malaysia on Progress in Cryptology - Mycrypt 2005 ; Conference date: 28-09-2005 Through 30-09-2005",
}