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).
FROG
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
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.
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.
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