Square (cipher)

In <a href="/facts/Cryptography/e94PEVau">cryptography</a>, Square (sometimes written SQUARE) is a <a href="/facts/Block_cipher/MJywAyfQ">block cipher</a> invented by <a href="/facts/Joan_Daemen/cqdIFHHG">Joan Daemen</a> and <a href="/facts/Vincent_Rijmen/3S5n4f39">Vincent Rijmen</a>. The design, published in 1997, is a forerunner to <a href="/facts/Rijndael/HdXGBY2Q">Rijndael</a>, which has been adopted as the <a href="/facts/Advanced_Encryption_Standard/HdXGBY2Q">Advanced Encryption Standard</a>. Square was introduced together with a new form of <a href="/facts/Cryptanalysis/7CPEQlJI">cryptanalysis</a> discovered by <a href="/facts/Lars_Knudsen/ludw9nqB">Lars Knudsen</a>, called the "<a href="/facts/Square_attack/fVcFNbdy">Square attack</a>".
The structure of Square is a <a href="/facts/Substitution%25E2%2580%2593permutation_network/MLjdoC5j">substitution–permutation network</a> with eight rounds, operating on 128-bit blocks and using a 128-bit <a href="/facts/Key_(cryptography)/5W5PAmT4">key</a>.
Square is not patented.

<ul><li>Joan Daemen; Lars Knudsen; Vincent Rijmen (1997). The Block Cipher Square. <a href="/facts/Fast_Software_Encryption/TgVIMDmb">Fast Software Encryption</a> (FSE) 1997, Volume 1267 of <a href="/facts/Lecture_Notes_in_Computer_Science/1UeA77BC">Lecture Notes in Computer Science</a>. <a href="/facts/Haifa%2c_Israel/L3zIs1p1">Haifa, Israel</a>: <a href="/facts/Springer-Verlag/nAesf6nT">Springer-Verlag</a>. pp. 149–165. <a href="/facts/CiteSeerX_(identifier)/SceDmd3c">CiteSeerX</a> <a href="https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.55.6109">10.1.1.55.6109</a>.</li>
<li><a href="http://www.users.zetnet.co.uk/hopwood/crypto/scan/cs.html#Square">SCAN's entry for Square</a></li></ul>

Square (cipher) open-in-new

Square (cipher)