# ORYX

﻿
ORYX

ORYX is an encryption algorithm used in cellular communications in order to protect data traffic. It is a stream cipher designed to have a very strong 96-bit key strength with a way to reduce the strength to 32-bits for export. However, due to mistakes the actual strength is a trivial 16-bits and any signal can be cracked after the first 25-27 bytes.[1]

## Algorithm Description

ORYX is a simple stream cipher based on binary linear feedback shift registers (LFSRs) to protect cellular data transmissions(for wireless data services). The cipher ORYX has four components: three 32-bit LFSRs which labeled as LFSRA, LFSRB and LFSRK, and an S-box containing a known permutation P of the integer values 0 to 255.

•The feedback function for LFSRK is defined as:

Lt+32= Lt+28⊕Lt+19⊕Lt+18⊕Lt+16⊕Lt+14⊕Lt+11⊕Lt+10⊕Lt+9⊕Lt+6⊕Lt+5⊕Lt+1⊕Lt

•The feedback functions for LFSRA are defined as:

Lt+32=Lt+26⊕Lt+23⊕Lt+22⊕Lt+16⊕Lt+12⊕Lt+11⊕Lt+10⊕Lt+8⊕Lt+7⊕Lt+5⊕Lt+4⊕Lt+2⊕Lt+1⊕Lt

and

Lt+32=Lt+27⊕Lt+26⊕Lt+25⊕Lt+24⊕Lt+23⊕Lt+22⊕Lt+17⊕Lt+13⊕Lt+11⊕Lt+10⊕Lt+9⊕Lt+8⊕Lt+7⊕Lt+2⊕Lt+1⊕Lt

•The feedback function for LFSRB is:

Lt+32=Lt+31⊕Lt+21⊕Lt+20⊕Lt+16⊕Lt+15⊕Lt+6⊕Lt+3⊕Lt+1⊕Lt

Cryptanalysis of TIA's Common Cryptographic Algorithms

## Notes

1. ^ [D. Wagner, L. Simpson, E. Dawson, J. Kelsey, W. Millan, and B. Schneier http://www.schneier.com/paper-oryx.pdf "Cryptanalysis of ORYX"], Fifth Annual Workshop on Selected Areas in Cryptography, Springer Verlag, August 1998, to appear.

Wikimedia Foundation. 2010.

### Look at other dictionaries:

• oryx — oryx …   Dictionnaire des rimes

• Oryx — Oryx …   Wikipédia en Français

• oryx — [ ɔriks ] n. m. • XVIIIe; orix 1530; mot lat. d o. gr. ♦ Mammifère des déserts (artiodactyles), sorte de gazelle aux cornes très longues et pointues. ⇒ algazelle. ● oryx nom masculin (grec oruks) Antilope des régions désertiques d Afrique et d… …   Encyclopédie Universelle

• Oryx — (griechisch Ὄρυχ „spitzes Werkzeug“)steht für: Oryxantilopen, Gattung der Paarhufer, die nach ihren spießartigen Hörnern benannt ist, eine antike Stadt in Arkadien, beim heutigen Mouria auf der Peloponnes, siehe Halous Oryx (Helikopter),… …   Deutsch Wikipedia

• Oryx — O ryx ([=o] r[i^]ks), prop. n. [NL., from Gr. o ryx a kind of gazelle or antelope.] (Zo[ o]l.) A genus of African antelopes which includes the gemsbok, the leucoryx, the bisa antelope ({Oryx beisa}), and the beatrix antelope ({Oryx beatrix}) of… …   The Collaborative International Dictionary of English

• oryx — late 14c., from L. oryx, from Gk. oryx (gen. orygos) North African antelope with pointed horns, the digging animal, lit. pick axe. Used in Greek and Latin bibles to render Hebrew tho, which early English Bibles misidentified as everything from a… …   Etymology dictionary

• oryx — [ōr′iks, ôr′iks] n. pl. oryxes or oryx [ModL < L, wild goat, gazelle < Gr, lit., pickax (< oryssein, to dig: for IE base see RUPTURE): from its pointed horns] any of a genus (Oryx) of large African and Asian antelopes with long, straight …   English World dictionary

• oryx — s. m. antilopă cu părul roşcat şi cu coarne lungi şi subţiri, curbate spre spate, în regiunile de deşert ale Africii şi Arabiei. (< fr. oryx, gr. oryks) Trimis de raduborza, 15.09.2007. Sursa: MDN …   Dicționar Român

• Oryx — Oryx, eine Art Antilope, s.d. 1) e) …   Pierer's Universal-Lexikon

• Oryx — Oryx, die Steppenkuh, s. Antilopen, S. 578 …   Meyers Großes Konversations-Lexikon

• ORYX — Technology Corporation (Business » NASDAQ Symbols) …   Abbreviations dictionary

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.