MysteryTwister C3
NUMBER OF ACTIVE MEMBERS:

11226
Register here
Follow us: Facebook Twitter
Dear users, we apologize for the long response times of our server. We are currently in the closing stages of developing a completely redesigned site with much better performance, and we are confident to go live this summer. Thanks for your understanding.
  



Level II Challenges (162)

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

ORYX Stream Cipher — Part 3 (revised)
[stamp-13] - 30 users already solved this challenge, 1 is 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!
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-06-06 20:39
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#30) Achieved points (Global score) y-m-d - h:m:s
Viktor (Veselovský) 2000 (169444) 2013-06-06 22:17:21
J. M. (jomandi) 2000 (113270) 2013-06-06 23:37:08
Kurt Gebauer (Yokozuna) 2000 (286256) 2013-06-07 03:14:23
George (Theofanidis) 2000 (137118) 2013-06-07 05:16:04
#5 Armin Krauss (argh) 2000 (206965) 2013-06-07 20:33:29
#6 Hans Peter (hanspeter) 1547 (52356) 2013-06-13 12:21:44
#7 Luigi Tomelli (archstanton) 1523 (127538) 2013-06-13 22:19:41
#8 Em Doulgerakis (Greko) 1349 (193799) 2013-07-03 09:44:44
#9 zahir mohsen moradi (ariobarzan) 1337 (99757) 2013-07-06 06:44:49
#10 Forrest Gump (Polyphem) 1196 (38763) 2013-11-25 21:40:40
#11 Francisco Moraes (fmoraes) 1194 (90044) 2013-12-01 06:21:38
#12 Alain (Integral) 1180 (207924) 2014-01-20 17:25:01
#13 Bart den Hartog (Bart13) 1163 (149337) 2014-04-22 23:36:42
#14 Scombes (jerva) 1137 (266541) 2015-01-25 09:27:26
#15 Claude Vaillancourt (Cl3v3r) 1134 (44229) 2015-03-06 17:02:44
#16 E.T (Ertheb) 1127 (81809) 2015-07-14 12:08:23
#17 Javantea (Javantea) 1125 (40816) 2015-08-28 20:04:24
#18 Martin Härterich (HaeM) 1124 (15149) 2015-10-06 14:59:08
#19 Alain Collignon (vexilla72) 1121 (123666) 2015-12-17 19:31:00
#20 Julia Bernotat (El Greco ) 1120 (81129) 2015-12-31 13:58:43
#21 Karl Schutt (günter) 1118 (44374) 2016-03-20 19:29:38
#22 Rider (alrider) 1113 (7214) 2016-09-05 00:06:31
#23 Nicolas (nicosPavlov) 1111 (257791) 2016-11-04 18:01:00
#24 Kasia (kasia-tutej) 1106 (53366) 2017-06-27 12:49:21
#25 D3d4lu5 (D3d4lu5) 1106 (363488) 2017-06-28 06:03:12
#26 George Lasry (george4096) 1106 (422251) 2017-06-28 15:20:52
#27 Michael (FoM) 1096 (57794) 2019-02-18 13:22:49
#28 Klaus (kumaus) 1096 (22017) 2019-04-16 10:28:33
#29 Eugene (lim0n) 1094 (199334) 2019-08-07 12:50:27
#30 Mike (RogueRamblers) 1093 (81614) 2019-11-16 01:01:12
You must be logged in to solve the challenge
Pages [1] 1 Show All  
 
 
powered by the CrypTool project  CrypTool

 

   +++    [22:12 - 18.10.2021] NikM solved the Level I challenge 'Wheatstone Cryptograph — Part 1'    +++    [18:43 - 18.10.2021] TaRaSS solved the Level I challenge 'Affine Codes / Modulo Arithmetic with N / Extended Euclid'    +++    [17:10 - 18.10.2021] tAnAs solved the Level I challenge 'Letter to the Templars — Part 2'    +++    [16:42 - 18.10.2021] TaRaSS solved the Level I challenge 'Beaver Code'    +++    [16:23 - 18.10.2021] TaRaSS solved the Level I challenge 'Number Sequence — Part 2'    +++