Loading AI tools
Block cipher From Wikipedia, the free encyclopedia
In cryptography, Nimbus is a block cipher invented by Alexis Machado in 2000. It was submitted to the NESSIE project, but was not selected.
General | |
---|---|
Designers | Alexis Machado |
First published | 2000 |
Cipher detail | |
Key sizes | 128 bits |
Block sizes | 64 bits |
Rounds | 5 |
Best public cryptanalysis | |
Differential cryptanalysis can break Nimbus with 256 chosen plaintexts. |
The algorithm uses a 128-bit key. It operates on blocks of 64 bits and consists of 5 rounds of encryption. The round function is exceedingly simple. In each round the block is XORed with a subkey, the order of its bits is reversed, and then it is multiplied mod 264 by another subkey, which is forced to be odd.[1]
Nimbus was broken by Vladimir Furman; he found a differential attack using only 256 chosen plaintexts.[2]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.