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Block cipher From Wikipedia, the free encyclopedia
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 | |
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Designers |
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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]