| Square | |
| General | |
|---|---|
| Designer(s): | Joan Daemen, Vincent Rijmen |
| First published: | 1997 |
| Successor(s): | AES, CRYPTON, Twofish, Serpent |
| Cipher detail | |
| Key size(s): | 128 bits |
| Block size(s): | 128 bits |
| Structure: | substitution-permutation network |
| Rounds: | 8 |
In cryptography, Square (sometimes written SQUARE) is a block cipher invented by Joan Daemen and Vincent Rijmen. The design, published in 1997, is a forerunner to the Rijndael algorithm, which has been adopted as the Advanced Encryption Standard. Square was introduced together with a new form of cryptanalysis discovered by Lars Knudsen, called the "Square attack". The structure of Square is a substitution-permutation network with eight rounds, operating on 128-bit blocks and using a 128-bit key. Square is not patented.
References
- Joan Daemen, Lars Knudsen, Vincent Rijmen (1997). "The Block Cipher Square" (PDF). Fast Software Encryption (FSE) 1997, Volume 1267 of Lecture Notes in Computer Science: 149–165, Haifa, Israel: Springer-Verlag. Retrieved on 2007-02-15.
