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Level II Challenges (143)
Page 1 of the challenges in Level II, ordered by date posted (the most recent appear first).
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The ORYX stream cipher consists of three 32-bit LFSRs X, A, B which are shifted differently depending on some bits in the LFSR X. The key stream is a combination of the highest 8 bits of each of the three LFSRs. It is neither feasible nor necessary to search the whole 96-bit key space, there are more efficient methods! Read more...
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Authors:
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Published on: 2013-06-06 20:39 |
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Maximum number of attempts for this challenge: 15 |
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All successful users of this challenge
| Rank |
User (#30) |
Achieved points (Global score) |
y-m-d - h:m:s |
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Viktor (Veselovský)
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2000 (166147) |
2013-06-06 22:17:21 |
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J. M. (jomandi)
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2000 (113270) |
2013-06-06 23:37:08 |
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Kurt Gebauer (Yokozuna)
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2000 (254983) |
2013-06-07 03:14:23 |
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George (Theofanidis)
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2000 (117369) |
2013-06-07 05:16:04 |
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#5 |
Armin Krauss (argh)
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2000 (196814) |
2013-06-07 20:33:29 |
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#6 |
Hans Peter (hanspeter)
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1547 (52356) |
2013-06-13 12:21:44 |
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#7 |
Luigi Tomelli (archstanton)
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1523 (113164) |
2013-06-13 22:19:41 |
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#8 |
Em Doulgerakis (Greko)
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1349 (131437) |
2013-07-03 09:44:44 |
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#9 |
zahir mohsen moradi (ariobarzan)
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1337 (99757) |
2013-07-06 06:44:49 |
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#10 |
Forrest Gump (Polyphem)
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1196 (38763) |
2013-11-25 21:40:40 |
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#11 |
Francisco Moraes (fmoraes)
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1194 (90044) |
2013-12-01 06:21:38 |
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#12 |
Alain (Integral)
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1180 (207924) |
2014-01-20 17:25:01 |
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#13 |
Bart den Hartog (Bart13)
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1163 (148936) |
2014-04-22 23:36:42 |
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#14 |
S Combes (jerva)
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1137 (163132) |
2015-01-25 09:27:26 |
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#15 |
Claude Vaillancourt (Cl3v3r)
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1134 (38351) |
2015-03-06 17:02:44 |
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#16 |
E.T (Ertheb)
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1127 (81809) |
2015-07-14 12:08:23 |
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#17 |
Javantea (Javantea)
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1125 (40816) |
2015-08-28 20:04:24 |
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#18 |
Martin Härterich (HaeM)
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1124 (15149) |
2015-10-06 14:59:08 |
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#19 |
Alain Collignon (vexilla72)
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1121 (116902) |
2015-12-17 19:31:00 |
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#20 |
Julia Bernotat (El Greco )
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1120 (81129) |
2015-12-31 13:58:43 |
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#21 |
Karl Schutt (günter)
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1118 (44273) |
2016-03-20 19:29:38 |
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#22 |
Rider (alrider)
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1113 (7214) |
2016-09-05 00:06:31 |
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#23 |
Nicolas (nicosPavlov)
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1111 (151166) |
2016-11-04 18:01:00 |
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#24 |
Kasia (kasia-tutej)
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1106 (53366) |
2017-06-27 12:49:21 |
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#25 |
D3d4lu5 (D3d4lu5)
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1106 (343788) |
2017-06-28 06:03:12 |
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#26 |
George Lasry (george4096)
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1106 (342650) |
2017-06-28 15:20:52 |
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#27 |
Michael (FoM)
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1096 (38953) |
2019-02-18 13:22:49 |
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#28 |
Klaus (kumaus)
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1096 (21415) |
2019-04-16 10:28:33 |
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#29 |
Eugene (lim0n)
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1094 (114102) |
2019-08-07 12:50:27 |
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#30 |
Mike (RogueRamblers)
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1093 (54327) |
2019-11-16 01:01:12 |
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