NUSH
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| Designer(s): | Anatoly Lebedev, Alexey Volchkov |
|---|---|
| First published: | 2000 |
| Key size(s): | 128, 192, or 256 bits |
| Block size(s): | 64, 128, or 256 bits |
| Rounds: | 9, 17, or 33 |
| Best public cryptanalysis: | |
| A linear attack faster than exhaustive search has been found. | |
In cryptography, NUSH is a block cipher invented by Anatoly Lebedev and Alexey Volchkov for LAN Crypto, a Russian company. It was submitted to the NESSIE project, but was not selected.
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 apparently been shown that linear cryptanalysis can break NUSH with less effort than a brute force attack.
[edit] References
- Lars Knudsen, Håvard Raddum (2001-03-07). "A first report on Whirlpool, NUSH, SC2000, Noekeon, Two-Track-MAC and RC6" (PDF). Retrieved on 2007-02-08.
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