In cryptography, NUSH is a block cipher invented by Anatoly Lebedev and Alexey Volchkov for the Russian company LAN Crypto. It was submitted to the NESSIE project, but was not selected.
| General | |
|---|---|
| Designers |
|
| First published | 2000 |
| Cipher detail | |
| Key sizes | 128, 192, or 256 bits |
| Block sizes | 64, 128, or 256 bits |
| Rounds | 9, 17, or 33 |
| Best public cryptanalysis | |
| A linear attack faster than exhaustive search has been found.[1] | |
NUSH exists in several different variants, using keys of 128, 192, or 256 bits, and a block size of 64, 128, or 256 bits. The number of rounds is 9, 17, or 33, depending on the block size. The algorithm uses key whitening, but no S-boxes; the only operations it uses are AND, OR, XOR, modular addition, and bit rotation.
It has been shown that linear cryptanalysis can break NUSH with less effort than a brute force attack.[2]
References
edit- ^ Lars Knudsen, Håvard Raddum (2001-03-07). "A first report on Whirlpool, NUSH, SC2000, Noekeon, Two-Track-MAC and RC6" (PDF). Retrieved 2018-09-13.
- ^ Wenling Wu, Dengguo Feng (23 July 2001). "Linear cryptanalysis of NUSH block cipher". Science China Information Sciences. 45 (1): 59–67. doi:10.1360/02yf9005. ISSN 1009-2757. S2CID 10803906.
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