|Designers||Joan Daemen, Vincent Rijmen|
|Successors||AES, CRYPTON, Twofish, Serpent|
|Key sizes||128 bits|
|Block sizes||128 bits|
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 Rijndael, 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".
Square is not patented.
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