- 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 ablock cipher invented byJoan Daemen andVincent Rijmen . The design, published in1997 , is a forerunner to theRijndael algorithm, which has been adopted as theAdvanced Encryption Standard . Square was introduced together with a new form ofcryptanalysis discovered byLars 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*** 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*]

*Wikimedia Foundation.
2010.*

### Look at other dictionaries:

**Two-square cipher**— The Two square cipher is a manual symmetric encryption technique. It was developed to ease the cumbersome nature of the large encryption/decryption matrix used in the four square cipher while still being slightly stronger than the Playfair cipher … Wikipedia**Four-square cipher**— The Four square cipher is a manual symmetric encryption technique. It was invented by famous French cryptographer Felix Delastelle.The technique encrypts pairs of letters ( digraphs ), and thus falls into a category of ciphers known as… … Wikipedia**Square**— may mean:Mathematics*Square (algebra), to multiply a number or other quantity by itself **Perfect square **Square matrix **Square number **Square root*Square (geometry), a polygon with four equal sides and angles **Unit square*Square wave, a… … Wikipedia**Square (cryptographie)**— Square Résumé Concepteur(s) Vincent Rijmen, Joan Daemen Première publication 1997 Dérivé de Chiffrement(s) basé(s) sur cet algorithme Rijndael Ca … Wikipédia en Français**Cipher security summary**— This article summarizes publicly known attacks against ciphers. Note that not all entries may be up to date. Table color key No known successful attacks Theoretical break Attack demonstrated in practice The Best attack column lists the complexity … Wikipedia**Cipher Block Chaining**— Mode d opération (cryptographie) En cryptographie, un mode d opération est la manière de traiter les blocs de texte clairs et chiffrés au sein d un algorithme de chiffrement par bloc. Chacun des modes possède ses propres atouts. Plusieurs modes… … Wikipédia en Français**cipher square**— noun : vigenère tableau … Useful english dictionary**Bifid cipher**— In classical cryptography, the bifid cipher is a cipher which combines the Polybius square with transposition, and uses fractionation to achieve diffusion. It was invented around 1901 by Felix Delastelle. Operation First, a mixed alphabet… … Wikipedia**Trifid cipher**— In classical cryptography, the trifid cipher is a cipher invented around 1901 by Felix Delastelle, which extends the concept of the bifid cipher to a third dimension, allowing each symbol to be fractionated into 3 elements instead of two. That is … Wikipedia**Four square (disambiguation)**— Four square can mean: *Four square, a ball game for all ages *Four square cipher in classical cryptography *Four Square (company) is a division of Mars, Incorporated *Four Square supermarkets in New Zealand *Four Square Writing Method, an… … Wikipedia