MysteryTwister C3
NUMBER OF ACTIVE MEMBERS:

8045
Follow us: Facebook Twitter
 



Level II Challenges (95)

Page 1 of the challenges in Level II, ordered by date posted (the most recent appear first).

ORYX Stream Cipher Part I

[stamp-01] - 69 users already solved this challenge, 8 are working on it.
 
 
 

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.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-10-14 13:30
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#69) Achieved points (Global score) y-m-d - h:m:s

Nabb (Nabb) 1660 (13803) 2010-10-18 11:50:55
un known (unknown) 1576 (5466) 2010-10-20 00:14:52
Joachim Protze (joschi) 1547 (4877) 2010-10-21 12:55:53
Armin Krauss (argh) 1367 (152721) 2010-11-05 23:22:19
#5 Thomas Gonda (TomG) 1236 (33741) 2011-01-14 20:39:40
#6 Nobody (nobody) 1231 (40618) 2011-01-21 17:39:53
#7 Wolfgang Weisser (wowmyst) 1215 (33108) 2011-02-16 22:20:24
#8 Pramathesh (pramathesh5) 1200 (1200) 2011-03-24 03:29:46
#9 Foram (Patel) 1200 (1200) 2011-03-24 03:33:11
#10 kyprizel (kyprizel) 1188 (20795) 2011-05-01 18:17:20
#11 J. M. (jomandi) 1168 (113270) 2011-08-03 18:40:30
#12 Viktor (Veselovský) 1165 (113116) 2011-08-21 00:03:44
#13 Daniel Fretwell (fretty) 1165 (30107) 2011-08-22 00:54:26
#14 Seth Kintigh (DarkFibre) 1163 (79471) 2011-09-04 07:18:15
#15 Flip (Flip) 1162 (31107) 2011-09-10 16:59:44
#16 Anton Wendel (MoD) 1150 (5679) 2011-12-15 01:40:11
#17 unknown anonymous (s1op) 1150 (1150) 2011-12-16 00:46:38
#18 Friedrich Wiemer (asante) 1150 (5183) 2011-12-16 00:49:58
#19 Sk1w41k35 (Sk1w41k35) 1150 (1150) 2011-12-17 17:26:46
#20 Nicolas Golubovic (qll) 1150 (14919) 2011-12-18 12:58:28
#21 Jan Temme (JaT3) 1150 (11694) 2011-12-18 17:04:05
#22 h3po (h3po) 1150 (20433) 2011-12-18 21:28:01
#23 jacobian1729 (jacobian1729) 1144 (5584) 2012-02-16 17:44:54
#24 Bart den Hartog (Bart13) 1144 (116412) 2012-02-24 02:11:58
#25 Ashwin R (Ar) 1142 (1142) 2012-03-22 07:50:31
#26 Luigi Tomelli (archstanton) 1142 (95549) 2012-03-24 10:38:55
#27 Michel Van Caneghem (vancan) 1141 (49719) 2012-04-01 20:59:36
#28 Amit Balid (amitbalid) 1141 (1141) 2012-04-03 00:26:40
#29 Kurt Gebauer (Yokozuna) 1139 (120839) 2012-04-27 22:46:11
#30 Johannes T. (K2d) 1126 (1428) 2012-12-10 17:50:25
#31 David (pilz) 1126 (1126) 2012-12-11 23:41:57
#32 Fabian Hemmer (llan) 1126 (7842) 2012-12-12 20:17:13
#33 Bleh (bleh) 1126 (1126) 2012-12-17 01:57:44
#34 rokky rokksus (rokksus) 1126 (1126) 2012-12-17 02:15:15
#35 Tron (Tron) 1126 (7381) 2012-12-17 09:44:38
#36 Hans Peter (hanspeter) 1125 (48115) 2013-01-16 23:15:44
#37 George (Theofanidis) 1125 (88988) 2013-01-20 13:55:05
#38 Em Doulgerakis (Greko) 1123 (109970) 2013-02-16 21:28:26
#39 Michael Düll (akurei) 1123 (1123) 2013-02-27 17:32:12
#40 sukanya thakur (sthakur) 1122 (2244) 2013-03-22 23:01:45
#41 zahir mohsen moradi (ariobarzan) 1118 (99757) 2013-07-06 16:57:23
#42 Almut (problelmo) 1117 (45992) 2013-08-01 23:08:04
#43 Seth (cville) 1117 (1117) 2013-08-17 13:50:36
#44 chris_3stones (3stones) 1115 (34472) 2013-10-31 19:27:34
#45 Forrest Gump (Polyphem) 1114 (38763) 2013-11-09 02:32:23
#46 Deebiga Rajeswaran (deebiga) 1114 (1114) 2013-11-09 05:07:12
#47 aishwarya rastogi (aishwarya) 1114 (1114) 2013-11-09 05:18:51
#48 Francisco Moraes (fmoraes) 1114 (90044) 2013-11-26 15:34:47
#49 Alain (Integral) 1113 (198642) 2014-01-18 19:10:51
#50 Javantea (Javantea) 1109 (38889) 2014-05-24 19:40:23
#51 Robert (rm) 1106 (56012) 2014-11-25 21:14:44
#52 S Combes (jerva) 1104 (77932) 2015-01-20 21:32:49
#53 Claude Vaillancourt (Cl3v3r) 1104 (38251) 2015-03-01 23:18:47
#54 E.T (Ertheb) 1102 (54872) 2015-06-23 19:14:33
#55 Martin Härterich (HaeM) 1100 (15149) 2015-10-03 10:50:09
#56 Sean (Kavanaugh) 1099 (29143) 2015-12-05 23:39:32
#57 Alain Collignon (vexilla72) 1099 (49713) 2015-12-11 12:53:34
#58 Julia Bernotat (El Greco ) 1099 (81129) 2015-12-24 13:15:59
#59 Vikash (vikash72) 1098 (1098) 2016-03-19 07:20:02
#60 Karl Schutt (günter) 1098 (34469) 2016-03-19 15:49:34
#61 Swathi Nambiar (Swathi18) 1098 (1098) 2016-03-20 22:59:25
#62 Rider (alrider) 1096 (7214) 2016-08-30 21:11:36
#63 Nicolas (nicosPavlov) 1095 (70954) 2016-10-10 17:16:53
#64 digiter (digiter1) 1093 (2187) 2017-03-13 04:44:06
#65 bo (booooooooooooooo) 1093 (1193) 2017-03-13 07:17:23
#66 chris (c2) 1093 (51973) 2017-03-21 15:49:29
#67 Vasudha Venkatesh (vasu18) 1093 (2292) 2017-03-23 11:06:41
#68 Dominik M. (Sgt. Pepper) 1093 (43997) 2017-05-07 21:58:12
You must be logged in to solve the challenge
Pages [1] 1 Show All  
 
 
powered by the CrypTool project  CrypTool

 

   +++    [20:10 - 25.05.2017] kasia-tutej solved the Level I challenge 'Number Sequence — Part 2'    +++    [15:58 - 25.05.2017] kasia-tutej solved the Level I challenge 'Number Sequence'    +++    [13:56 - 25.05.2017] mir0soft solved the Level I challenge 'ECDH-Key Exchange for Beginners'    +++    [07:50 - 25.05.2017] joelhdzhdz solved the Level II challenge 'Alice's Birthday Party (Part 1)'    +++    [03:35 - 25.05.2017] tryeng solved the Level I challenge 'A hidden word — Part 2'    +++