- Anubis (cipher)
Infobox block cipher

name = Anubis

caption =

designers = Vincent Rijmen and Paulo S. L. M. Barreto

publish date = 2000

derived from =Rijndael

derived to =

key size = 128 to 320 bits in steps of 32 bits

block size = 128 bits

structure =substitution-permutation network

rounds = at least 12 (for 128-bit keys), plus one per additional 32 key bits

cryptanalysis =**Anubis**is ablock cipher designed byVincent Rijmen andPaulo S. L. M. Barreto as an entrant in theNESSIE project. Anubis operates on data blocks of 128 bits, accepting keys of length 32"N" bits ("N" = 4, ..., 10). The cipher is not patented and has been released by the designers for free public use.Anubis is a Rijndael variant that uses

involution s for the various operations. An involution is an operation whose inverse is the same as the forward operation. In other words, when an involution is run twice, it is the same as performing no operation. This allows low-cost hardware and compact software implementations to use the same operations for both encryption and decryption. Both the S-box and the mix columns operations are involutions.There are two versions of the Anubis cipher; the original implementation uses a pseudo-random S-box. Subsequently, the S-box was modified to be more efficient to implement in hardware; the newer version of Anubis is called the "tweaked" version.

It is named after the Egyptian god of entombing and embalming, which the designers interpreted to include

encryption . They claim that violators of the cipher will becurse d.**References*** cite conference

author =Alex Biryukov

title = Analysis of Involutional Ciphers: Khazad And Anubis

booktitle = 10th International Workshop onFast Software Encryption (FSE '03)

pages = pp.45–53

publisher =Springer-Verlag

month = February | year = 2003

location =Lund

url = http://citeseer.ist.psu.edu/587474.html

format =PDF /PostScript

accessdate = 2007-08-21**External links*** [

*http://paginas.terra.com.br/informatica/paulobarreto/AnubisPage.html Anubis Homepage*]

*Wikimedia Foundation.
2010.*

### Look at other dictionaries:

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