Square (cipher)

Square (cipher)

Infobox block cipher
name = Square

caption =
designers = Joan Daemen, Vincent Rijmen
publish date = 1997
derived from =
derived to = AES, CRYPTON, Twofish, Serpent
key size = 128 bits
block size = 128 bits
structure = substitution-permutation network
rounds = 8
cryptanalysis =

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.


* cite conference
author = Joan Daemen, Lars Knudsen, Vincent Rijmen
title = The Block Cipher Square
booktitle = Fast Software Encryption (FSE) 1997, Volume 1267 of Lecture Notes in Computer Science
pages = 149–165
publisher = Springer-Verlag
date = 1997
location = Haifa, Israel
url = http://www.esat.kuleuven.ac.be/~cosicart/pdf/VR-9700.PDF
format = PDF
accessdate = 2007-02-15

External links

* [http://www.users.zetnet.co.uk/hopwood/crypto/scan/cs.html#Square SCAN's entry for Square]

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