MysteryTwister C3
NUMBER OF ACTIVE MEMBERS:

9969
Follow us: Facebook Twitter

Server maintenance from November 29 to December 2, 2019

MysteryTwister C3 will be offline due to maintenance work starting on Friday November 29, 2019 at 9:00 AM UTC.
 



Level II Challenges (133)

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] - 29 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 (#29) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 2000 (155163) 2013-06-06 22:17:21
J. M. (jomandi) 2000 (113270) 2013-06-06 23:37:08
Kurt Gebauer (Yokozuna) 2000 (177433) 2013-06-07 03:14:23
George (Theofanidis) 2000 (113380) 2013-06-07 05:16:04
#5 Armin Krauss (argh) 2000 (188214) 2013-06-07 20:33:29
#6 Hans Peter (hanspeter) 1547 (52256) 2013-06-13 12:21:44
#7 Luigi Tomelli (archstanton) 1523 (108345) 2013-06-13 22:19:41
#8 Em Doulgerakis (Greko) 1349 (131437) 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 (162196) 2014-04-22 23:36:42
#14 S Combes (jerva) 1137 (99132) 2015-01-25 09:27:26
#15 Claude Vaillancourt (Cl3v3r) 1134 (38351) 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 (96903) 2015-12-17 19:31:00
#20 Julia Bernotat (El Greco ) 1120 (81129) 2015-12-31 13:58:43
#21 Karl Schutt (günter) 1118 (41550) 2016-03-20 19:29:38
#22 Rider (alrider) 1113 (7214) 2016-09-05 00:06:31
#23 Nicolas (nicosPavlov) 1111 (151166) 2016-11-04 18:01:00
#24 Kasia (kasia-tutej) 1106 (53366) 2017-06-27 12:49:21
#25 D3d4lu5 (D3d4lu5) 1106 (297709) 2017-06-28 06:03:12
#26 George Lasry (george4096) 1106 (302230) 2017-06-28 15:20:52
#27 Michael (FoM) 1096 (38953) 2019-02-18 13:22:49
#28 Klaus (kumaus) 1096 (21415) 2019-04-16 10:28:33
#29 Eugene (lim0n) 1094 (67666) 2019-08-07 12:50:27
You must be logged in to solve the challenge
Pages [1] 1 Show All  
 
 
powered by the CrypTool project  CrypTool

 

   +++    [15:43 - 14.11.2019] Bart13 solved the Level III challenge 'Cipher ID'    +++    [15:17 - 14.11.2019] phihhim solved the Level I challenge 'Affine Codes / Modulo Arithmetic with N / Extended Euclid'    +++    [09:00 - 14.11.2019] SirAbacus solved the Level I challenge 'Number Sequence — Part 3'    +++    [06:47 - 14.11.2019] Miles solved the Level I challenge '¿No Hablas Español? No problemo!'    +++    [05:26 - 14.11.2019] Akuro solved the Level II challenge 'Letter to the Templars — Part 3'    +++