About: Nimbus (cipher)

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In cryptography, Nimbus is a block cipher invented by in 2000. It was submitted to the NESSIE project, but was not selected. The algorithm uses a 128-bit key. It operates on blocks of 64 bits and consists of 5 rounds ofencryption. 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. Nimbus was broken by ; he found a differential attack using only 256 chosen plaintexts.

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  • In cryptography, Nimbus is a block cipher invented by in 2000. It was submitted to the NESSIE project, but was not selected. The algorithm uses a 128-bit key. It operates on blocks of 64 bits and consists of 5 rounds ofencryption. 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. Nimbus was broken by ; he found a differential attack using only 256 chosen plaintexts. (en)
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  • 64 (xsd:integer)
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  • Differential cryptanalysis can break Nimbus with 256 chosen plaintexts. (en)
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  • 128 (xsd:integer)
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  • Nimbus (en)
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  • 2000 (xsd:integer)
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  • In cryptography, Nimbus is a block cipher invented by in 2000. It was submitted to the NESSIE project, but was not selected. The algorithm uses a 128-bit key. It operates on blocks of 64 bits and consists of 5 rounds ofencryption. 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. Nimbus was broken by ; he found a differential attack using only 256 chosen plaintexts. (en)
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  • Nimbus (cipher) (en)
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