Level II Challenges (155)
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!
Hint: Enter the codeword in hex with non-capital letters and a leading zero. Read more...
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Author:
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Published on: 2010-10-14 13:30 |
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Maximum number of attempts for this challenge: 20 |
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All successful users of this challenge
| Rank |
User (#47) |
Achieved points (Global score) |
y-m-d - h:m:s |
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Nabb (Nabb)
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1660 (13803) |
2010-10-18 12:47:49 |
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un known (unknown)
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1547 (5466) |
2010-10-20 22:49:54 |
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Joachim Protze (joschi)
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1523 (4877) |
2010-10-21 14:54:25 |
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Armin Krauss (argh)
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1353 (206765) |
2010-11-08 14:54:26 |
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#5 |
Thomas Gonda (TomG)
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1235 (36291) |
2011-01-16 11:55:46 |
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#6 |
Wolfgang Weisser (wowmyst)
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1215 (33108) |
2011-02-16 23:30:50 |
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#7 |
J. M. (jomandi)
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1168 (113270) |
2011-08-03 19:17:18 |
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#8 |
Viktor (Veselovský)
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1163 (169244) |
2011-08-30 02:58:06 |
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#9 |
Seth Kintigh (DarkFibre)
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1163 (79471) |
2011-09-04 08:05:16 |
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#10 |
Flip (Flip)
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1161 (31107) |
2011-09-14 10:32:16 |
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#11 |
Jan Temme (JaT3)
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1150 (11694) |
2011-12-18 20:39:31 |
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#12 |
Nobody (nobody)
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1150 (42945) |
2011-12-20 16:04:06 |
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#13 |
Bart den Hartog (Bart13)
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1144 (148936) |
2012-02-25 05:40:54 |
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#14 |
Kurt Gebauer (Yokozuna)
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1139 (278213) |
2012-04-28 12:41:41 |
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#15 |
Fabian Hemmer (llan)
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1126 (7842) |
2012-12-12 21:01:37 |
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#16 |
Tron (Tron)
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1126 (7381) |
2012-12-21 23:17:18 |
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#17 |
Hans Peter (hanspeter)
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1125 (52356) |
2013-01-20 02:16:27 |
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#18 |
George (Theofanidis)
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1123 (120805) |
2013-03-12 00:17:58 |
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#19 |
sukanya thakur (sthakur)
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1122 (2244) |
2013-03-22 23:09:29 |
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#20 |
Luigi Tomelli (archstanton)
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1120 (113164) |
2013-05-31 12:51:45 |
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#21 |
zahir mohsen moradi (ariobarzan)
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1118 (99757) |
2013-07-06 16:58:18 |
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#22 |
Em Doulgerakis (Greko)
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1118 (148908) |
2013-07-09 14:44:56 |
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#23 |
Forrest Gump (Polyphem)
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1114 (38763) |
2013-11-15 00:49:01 |
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#24 |
Francisco Moraes (fmoraes)
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1114 (90044) |
2013-11-27 18:44:56 |
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#25 |
Alain (Integral)
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1113 (207924) |
2014-01-19 10:33:36 |
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#26 |
S Combes (jerva)
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1104 (218893) |
2015-01-24 13:53:58 |
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#27 |
Claude Vaillancourt (Cl3v3r)
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1104 (42910) |
2015-03-02 16:16:57 |
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#28 |
E.T (Ertheb)
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1102 (81809) |
2015-06-23 21:07:09 |
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#29 |
Javantea (Javantea)
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1101 (40816) |
2015-09-10 20:38:45 |
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#30 |
Martin Härterich (HaeM)
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1100 (15149) |
2015-10-04 12:07:10 |
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#31 |
Sean (Kavanaugh)
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1099 (29143) |
2015-12-05 23:37:14 |
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#32 |
Alain Collignon (vexilla72)
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1099 (123466) |
2015-12-13 10:14:49 |
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#33 |
Julia Bernotat (El Greco )
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1099 (81129) |
2016-01-03 15:54:10 |
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#34 |
Karl Schutt (günter)
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1098 (44374) |
2016-03-19 18:49:03 |
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#35 |
Robert (rm)
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1097 (56475) |
2016-04-20 15:36:24 |
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#36 |
Rider (alrider)
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1096 (7214) |
2016-09-01 22:14:21 |
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#37 |
Nicolas (nicosPavlov)
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1095 (257791) |
2016-11-01 13:24:34 |
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#38 |
Kasia (kasia-tutej)
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1092 (53366) |
2017-06-22 13:42:41 |
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#39 |
George Lasry (george4096)
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1092 (372955) |
2017-06-24 22:45:21 |
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#40 |
D3d4lu5 (D3d4lu5)
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1092 (363488) |
2017-06-27 17:20:22 |
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#41 |
Random Dude (rnd)
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1088 (102352) |
2018-09-14 01:06:06 |
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#42 |
Michael (FoM)
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1087 (54376) |
2019-02-15 18:09:54 |
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#43 |
Klaus (kumaus)
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1087 (22017) |
2019-04-12 17:31:41 |
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#44 |
Eugene (lim0n)
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1086 (175225) |
2019-08-05 16:00:50 |
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#45 |
Mike (RogueRamblers)
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1085 (69070) |
2019-11-08 01:56:10 |
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#46 |
LurkNoi (Lurkrul)
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1084 (19595) |
2020-02-13 08:45:22 |
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#47 |
Gerd Wilts (gerdw)
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1084 (50534) |
2020-02-22 09:25:34 |
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