FROG
Block cipher / From Wikipedia, the free encyclopedia
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This article is about the block cipher algorithm. For the ultrafast laser pulse measurement technique, see Frequency-resolved optical gating. For other uses, see Frog (disambiguation).
In cryptography, FROG is a block cipher authored by Georgoudis, Leroux and Chaves. The algorithm can work with any block size between 8 and 128 bytes, and supports key sizes between 5 and 125 bytes. The algorithm consists of 8 rounds and has a very complicated key schedule.
Quick Facts General, Designers ...
General | |
---|---|
Designers | Dianelos Georgoudis, Damian Leroux, and Billy Simón Chaves |
First published | 1998 |
Cipher detail | |
Key sizes | 128, 192, or 256 bits |
Block sizes | 128 bits |
Rounds | 8 |
Best public cryptanalysis | |
Differential and linear attacks against some weak keys |
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It was submitted in 1998 by TecApro, a Costa Rican software company, to the AES competition as a candidate to become the Advanced Encryption Standard. Wagner et al. (1999) found a number of weak key classes for FROG. Other problems included very slow key setup and relatively slow encryption. FROG was not selected as a finalist.