DEAL
{{Short description|Block cipher}}
{{Other uses|Deal (disambiguation)}}
{{Infobox block cipher
| name = DEAL
| image = Image:Deal-round-function.svg
| caption = Round function of DEAL
| designers = Lars Knudsen
| publish date = 1998
| derived from = DES
| derived to =
| related to = Ladder-DES
| key size = 128, 192 or 256 bits
| block size = 128 bits
| structure = Nested Feistel network
| rounds = 6 (128- and 192-bit key) or 8 (256-bit key)
| cryptanalysis =
}}
In cryptography, DEAL (Data Encryption Algorithm with Larger blocks) is a symmetric block cipher derived from the Data Encryption Standard (DES). Its design was presented by Lars Knudsen at the SAC conference in 1997, and submitted as a proposal to the AES contest in 1998 by Richard Outerbridge.
DEAL is a Feistel network which uses DES as the round function. It has a 128-bit block size and a variable key size of either 128, 192, or 256 bits; with 128-bit and 192-bit keys it applies 6 rounds, or 8 rounds with 256-bit keys. It has performance comparable to Triple DES, and was therefore relatively slow among AES candidates.
See also
References
- {{cite conference
| author = John Kelsey, Bruce Schneier
| title = Key-Schedule Cryptanalysis of DEAL
| conference = 6th Annual International Workshop on Selected Areas in Cryptography (SAC '99)
| pages = 118–134
| publisher = Springer-Verlag
| date = August 1999
| location = Kingston, Ontario
| url = http://www.schneier.com/paper-deal.html
| format = PDF/PostScript
| access-date = 2007-08-23 }}
- Stefan Lucks: On Security of the 128-Bit Block Cipher DEAL. Fast Software Encryption 1999: 60–70
External links
- [https://web.archive.org/web/20040630201630/http://www.mat.dtu.dk/people/Lars.R.Knudsen/newblock.html The original DEAL report]
- [http://www.users.zetnet.co.uk/hopwood/crypto/scan/cs.html#DEAL SCAN's entry for DEAL]
- [https://csrc.nist.gov/archive/aes/round1/conf1/deal-slides.pdf AES presentation slides] (PDF)
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Category:Data Encryption Standard
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