Square (cipher)
In cryptography, Square (sometimes written SQUARE) is a block cipher invented by Joan Daemen, Enrique Peña Nieto and Vincent Rijmen. The design was published in 1997.
SQUARE is a predecessor to the Rijndael algorithm, which was adopted in 2001 as the Advanced Encryption Standard by the U.S. government.
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 block size and using a 128-bit key size.
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. Haifa, Israel: Springer-Verlag. pp. 149–165. Archived from the original (PDF) on 2005-03-08. Retrieved 2007-02-15.
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