MysteryTwister C3
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Four levels

Four levels of increasing difficulty: From pen & paper to complex mathematical problems.

Limited attempts

You have only a limited number of attempts to solve each challenge. Be certain of your answer before you submit it.

Be fast

Be fast and earn a place on the Hall of Fame. The first four to solve each challenge will be displayed permanently.

Special Level X

The special level X contains cryptographic problems which are currently not known to have been solved.



Cipher challenges on four levels

 

Level I crypto challenges

Level I Challenges - Pen & Paper

Level I challenges are similar to crossword puzzles from newspapers and can be solved with little cryptographic background. You might not even need a computer for solving level I challenges — all you need is a bit of clever thinking and probably a pen and paper. A program like CrypTool applied to a level I challenge can help reveal the answer within minutes or even seconds, if the necessary algorithms are already built in. Hence, if you are new to cryptography, but nonetheless interested in the mysterious topic of cryptanalysis, give the level I challenges a try. You will almost assuredly meet quickly with success.
 
Level II crypto challenges

Level II Challenges - Programming skills required

Level II challenges require some background knowledge in cryptology and usually some computational power. Additionally, you may require tools that are not available in such convenient packages like CrypTool, OpenSSL or Sage. Therefore, you must first thoroughly understand the problem in order to write a computer program, which helps you getting along. It could take hours or even days to solve a level II challenge. Hence, if you consider yourself well-armed with cryptologic knowledge (such as if you are a university student in a cryptographic course), give the level II challenges a try. Success may not come easily, but it will be a worthwhile endeavor.
 
Level III crypto challenges

Level III Challenges - Extensive computing power recommended

Level III challenges require a thorough background in cryptanalysis and usually significant computational power as well. The problems in this level represent current research topics that are believed to be very difficult to solve. Thus, practical solutions may not even exist and ready-to-run tools almost certainly do not. The methodology to solve some of these challenges may already be known, but it may require such a huge amount of computational power that only a large group of people working together in a distributed system could obtain the solution. Challenges in this category mark the thin line between algorithms that are still secure and those that are not. Solving them may take weeks or even several months. Hence, challenges in this level are intended for entire research groups with many experts in cryptanalysis, programming, and distributed systems. Success cannot be guaranteed, but if you are the first to successfully solve one of these challenges, it probably would catch the attention of the scientific community. Of course, it still remains up to you to publish or present any such scientific techniques and results.
 
Level X crypto challenges

Level X Challenges - Unsolved ciphers

Most level X challenges contain problems that have remained unsolved for a long time. The fact that they have been unsolved regardless of numerous attempts suggests these challenges being hard. However, a simple idea can probably reduce the difficulty of it to a simple level I challenge — currently it is just unknown if and how they can be solved. Of course such a challenge cannot be solved with a simple codeword, since even we (the respective author and the MTC3 team) do not know the solution (the plaintext, the original message or the approach). So if you discover a promising solution you should either contact the author or the MTC3 team. Furthermore, you can publish your findings in a scientific journal such as Cryptologia or Journal of Cryptology.

 

Additionally, you may require tools that are not available in a convenient package like CrypTool.


All Challenges (274)

Ordered by date posted, the most recent appear first.

Ku Klux Klan

[schmeh-06] - 36 users already solved this challenge.
 
 
 

In 1923, a member of the Ku Klux Klan sent an encrypted telegram to one of his colleagues. This telegram could be preserved.

More than 60 years later, the US mathematician Cipher Deavours examined the telegram and was able to decipher it. In 1989, he published some of the details about the solution in the magazine Cryptologia („A Ku Klux Klan Cipher“, edition 3/1989). However, he didn‘t tell the complete solution – the last part was left to the reader as an exercise.
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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: 0

All successful users of this challenge

Rank User (#36) Achieved points (Global score) y-m-d - h:m:s

Seth Kintigh (DarkFibre) 2000 (79471) 2011-06-14 08:39:00
Viktor (Veselovský) 1000 (151602) 2011-11-08 13:52:00
The Killer (Killer) 1000 (42393) 2011-11-13 15:30:00
J. M. (jomandi) 1000 (113270) 2011-11-13 19:02:00
#5 Bart den Hartog (Bart13) 1000 (118984) 2012-02-10 18:45:00
#6 Dusan (xxdradus) 1000 (40236) 2012-06-22 17:38:00
#7 j.h. (haegarq) 1000 (15252) 2012-06-30 17:29:00
#8 Armin Krauss (argh) 1000 (185115) 2012-08-28 00:35:00
#9 Hans Peter (hanspeter) 1000 (52256) 2013-01-11 12:45:00
#10 Snake (snk) 1000 (77889) 2013-02-02 20:57:00
#11 swarmspider (swarmspider) 1000 (4528) 2013-04-23 14:37:00
#12 Almut (problelmo) 1000 (45992) 2013-06-16 13:44:00
#13 George Lasry (george4096) 1000 (299488) 2013-08-30 16:53:00
#14 George (Theofanidis) 1050 (106715) 2014-01-21 03:05:00
#15 E.T (Ertheb) 1000 (78180) 2014-03-10 08:57:33
#16 Bertold (bk) 1000 (9673) 2014-05-10 22:58:00
#17 Hughes (hughes) 1000 (7925) 2014-07-24 20:23:31
#18 julius gaius (julius) 1000 (25581) 2014-08-06 14:45:17
#19 Bernhard Gruber (bgr) 1000 (22889) 2014-09-29 19:10:43
#20 Julia Bernotat (El Greco ) 1000 (81129) 2015-02-06 18:50:51
#21 Kurt Gebauer (Yokozuna) 1000 (153663) 2015-02-09 19:15:39
#22 Joerg G. (SnifferMaster) 1000 (18154) 2015-10-06 19:10:00
#23 Szabó Zoltán (szabo.z87) 1000 (55604) 2015-12-13 13:27:00
#24 Dominik M. (Sgt. Pepper) 1000 (97919) 2016-01-12 21:24:00
#25 S (Zyphe) 1000 (10461) 2016-01-12 21:24:00
#26 Em Doulgerakis (Greko) 1000 (124033) 2016-05-03 17:05:00
#27 Martin (martinbucher) 1000 (27363) 2016-05-15 15:40:02
#28 zahir mohsen moradi (ariobarzan) 1000 (99757) 2016-05-26 23:53:00
#29 Rainer Zufall (kiekuk) 1000 (56786) 2016-09-09 13:40:00
#30 Norbert Biermann (Norbert) 1000 (45031) 2016-09-10 23:08:41
#31 Andreas Frerichs (Ossili) 1000 (33266) 2016-09-20 20:00:00
#32 D3d4lu5 (D3d4lu5) 1000 (273573) 2017-09-04 13:09:24
#33 Alain Collignon (vexilla72) 1000 (87833) 2018-08-13 14:59:39
#34 Random Dude (rnd) 1000 (83811) 2018-12-11 15:48:04
#35 zuben c3 (zuben-c3) 1000 (24853) 2019-02-04 12:42:31
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Enigma Part 1

[stamp-04] - 116 users already solved this challenge, 15 are working on it.
 
 
 

Decrypt the given ciphertext which is encrypted with the Enigma chiper. The wanted key conists of the configuration of the Enigma. Please give the letters in the key as 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: 15

All successful users of this challenge

Rank User (#116) Achieved points (Global score) y-m-d - h:m:s

Nobody (nobody) 2000 (40618) 2010-10-14 13:32:17
Joachim Protze (joschi) 1576 (4877) 2010-10-19 17:40:41
Ralf Stephan (rwst) 1523 (25229) 2010-10-22 09:32:28
Thomas Schmucker (dg) 1502 (26066) 2010-10-22 19:47:08
#5 kyprizel (kyprizel) 1469 (20795) 2010-10-25 11:55:07
#6 Roadrunner (rr) 1456 (12702) 2010-10-25 14:08:20
#7 Jascha Koch (yosh) 1433 (2201) 2010-10-27 17:37:44
#8 TURINGBOMBE (TBREAKER) 1433 (10616) 2010-10-28 00:40:18
#9 Siggi Bartz (sbartz) 1423 (2892) 2010-10-28 14:18:22
#10 Nabb (Nabb) 1423 (13670) 2010-10-28 14:50:08
#11 Armin Krauss (argh) 1423 (185115) 2010-10-28 21:54:26
#12 Ulrich Armbrüster (uarmbruester) 1315 (7987) 2010-11-19 22:54:31
#13 Hans Schuell (hschuell) 1312 (2194) 2010-11-20 13:39:51
#14 Sven Ge (Sven-from-de) 1292 (2852) 2010-11-30 02:51:13
#15 Thomas Gonda (TomG) 1275 (36291) 2010-12-10 11:44:40
#16 mischa (mmisc) 1228 (22426) 2011-01-26 02:31:00
#17 David (aki321) 1224 (27482) 2011-02-01 15:09:03
#18 Wolfgang Weisser (wowmyst) 1208 (33108) 2011-03-03 23:50:25
#19 Arshi (arshi) 1201 (1201) 2011-03-21 07:57:07
#20 Darshan (darshonline) 1201 (1201) 2011-03-21 08:05:59
#21 Fabian Hemmer (llan) 1190 (7842) 2011-04-25 00:50:23
#22 David Horvath (horvathd) 1178 (2438) 2011-06-10 14:15:25
#23 J. M. (jomandi) 1178 (113270) 2011-06-10 19:25:15
#24 Stefan Haas (stef_the_chef) 1169 (4329) 2011-07-24 14:08:47
#25 Peter Mustermann (Gummiboot) 1169 (60285) 2011-07-28 23:26:15
#26 Seth Kintigh (DarkFibre) 1168 (79471) 2011-07-31 04:44:36
#27 Daniel Fretwell (fretty) 1166 (30107) 2011-08-13 16:46:31
#28 h3po (h3po) 1164 (20433) 2011-08-24 07:49:29
#29 Viktor (Veselovský) 1163 (151602) 2011-09-01 23:28:34
#30 Nicolas Golubovic (qll) 1162 (14919) 2011-09-07 23:24:41
#31 dbuq (dbuq) 1162 (22762) 2011-09-09 22:01:21
#32 jane_jeakcy (jane_jeakcy) 1157 (1157) 2011-10-14 18:09:26
#33 Bart den Hartog (Bart13) 1151 (118984) 2011-12-12 21:11:56
#34 Michael Gürtler (michaelg) 1144 (4128) 2012-02-18 16:49:39
#35 Hans Peter (hanspeter) 1142 (52256) 2012-03-14 10:58:03
#36 Jais (oliver43) 1141 (1743) 2012-04-04 19:41:56
#37 JBBom (hn51) 1141 (1442) 2012-04-04 19:57:29
#38 Kurt Gebauer (Yokozuna) 1141 (153663) 2012-04-06 17:42:48
#39 Keith Randall (randall77) 1140 (31011) 2012-04-13 18:53:46
#40 Michel Van Caneghem (vancan) 1139 (49719) 2012-04-26 15:34:32
#41 Dusan (xxdradus) 1137 (40236) 2012-06-04 11:19:33
#42 Luigi Tomelli (archstanton) 1136 (108345) 2012-06-08 11:28:03
#43 Thomas Lambert (lambert) 1132 (35237) 2012-08-25 18:07:15
#44 Stepan (m1sterx) 1131 (19165) 2012-08-29 07:17:43
#45 Roland Jansen (roland) 1128 (17607) 2012-10-28 15:11:41
#46 Xiaohan Li (feng7801) 1128 (1128) 2012-11-13 17:17:28
#47 E.T (Ertheb) 1127 (78180) 2012-12-05 21:31:35
#48 Nikki Brandt (nikki) 1123 (2348) 2013-03-12 08:23:22
#49 George (Theofanidis) 1122 (106715) 2013-03-15 14:30:23
#50 RPH (derichard) 1122 (27044) 2013-04-05 00:00:28
#51 Paul Duplys (pd) 1121 (1525) 2013-04-23 22:06:47
#52 Los (Gurt) 1121 (2742) 2013-04-24 20:24:57
#53 Felix (Flix) 1121 (13712) 2013-04-27 19:51:27
#54 Almut (problelmo) 1118 (45992) 2013-07-10 21:08:12
#55 chris_3stones (3stones) 1117 (37759) 2013-08-03 10:49:34
#56 zahir mohsen moradi (ariobarzan) 1117 (99757) 2013-08-27 17:27:36
#57 Hank (hanky) 1116 (22859) 2013-10-03 15:39:08
#58 Forrest Gump (Polyphem) 1115 (38763) 2013-10-05 02:05:16
#59 Em Doulgerakis (Greko) 1115 (124033) 2013-10-08 21:13:20
#60 Steve (Samacian) 1115 (23804) 2013-10-10 03:52:10
#61 Francisco Moraes (fmoraes) 1115 (90044) 2013-11-06 16:47:57
#62 Liang Wu (leonwu) 1115 (1115) 2013-11-07 23:45:22
#63 Michael Möller (michaelm) 1114 (173129) 2013-11-08 16:13:09
#64 Norbert Paefgen (egebamyasi) 1114 (2728) 2013-11-27 20:49:01
#65 Jim Gillogly (Scryer) 1114 (21260) 2013-12-05 04:07:18
#66 George Robinson (osric) 1113 (1413) 2013-12-19 18:52:39
#67 Alain (Integral) 1113 (207924) 2013-12-20 14:51:31
#68 jonathan (munz) 1113 (8954) 2014-01-06 03:41:35
#69 Marcel (bene1512) 1112 (20896) 2014-02-16 18:46:16
#70 Snake (snk) 1108 (77889) 2014-07-16 12:26:14
#71 baz (oneiron) 1108 (12353) 2014-08-08 01:14:32
#72 julius gaius (julius) 1107 (25581) 2014-08-23 21:52:21
#73 Robert (rm) 1107 (56475) 2014-09-19 12:06:45
#74 jej (stationz) 1106 (4939) 2014-11-08 18:08:06
#75 Julia Bernotat (El Greco ) 1106 (81129) 2014-11-18 21:23:24
#76 Pavel (haw) 1105 (22728) 2014-12-05 23:28:25
#77 Kai Ludwig (TalentRaspel) 1105 (15704) 2015-01-18 00:02:39
#78 S Combes (jerva) 1104 (99132) 2015-01-25 20:09:15
#79 Georgius Stolte (HazmatsFear) 1104 (15671) 2015-02-18 19:36:12
#80 Bernhard Gruber (bgr) 1104 (22889) 2015-02-23 19:06:17
#81 Rainer Zufall (kiekuk) 1104 (56786) 2015-02-26 19:01:19
#82 Tien (tn9900) 1104 (1104) 2015-03-14 00:53:10
#83 Hans Joachim Girulat (joregi) 1103 (33593) 2015-04-05 22:13:46
#84 DirkS (Dustman) 1103 (8479) 2015-04-08 13:52:41
#85 Karl Schutt (günter) 1103 (41550) 2015-04-11 11:57:31
#86 KW (qwer*) 1102 (13963) 2015-06-27 10:42:36
#87 Claude Vaillancourt (Cl3v3r) 1100 (38351) 2015-09-25 14:20:36
#88 J-L Morel (Rossignol) 1100 (29125) 2015-10-10 14:36:39
#89 Alain Collignon (vexilla72) 1099 (87833) 2016-01-12 11:30:42
#90 Szabó Zoltán (szabo.z87) 1099 (55604) 2016-01-20 20:19:47
#91 Nofre Tete (noffi) 1099 (21921) 2016-01-22 17:15:40
#92 Andreas Frerichs (Ossili) 1098 (33266) 2016-02-08 20:31:22
#93 Marco Manfredi (mkk9901) 1098 (17686) 2016-03-25 11:05:42
#94 Erik (Erox) 1097 (22651) 2016-04-16 22:12:29
#95 Javantea (Javantea) 1096 (40816) 2016-07-07 21:02:35
#96 Norbert Biermann (Norbert) 1096 (45031) 2016-08-23 18:47:02
#97 Mirko Rendey (Biork) 1095 (6595) 2016-09-20 12:27:36
#98 HeinzelMann (Ohm) 1095 (5295) 2016-09-20 12:28:51
#99 Nicolas (nicosPavlov) 1095 (151166) 2016-10-16 12:52:22
#100 Tristan1473 (Tristan1473) 1094 (18914) 2017-02-19 12:49:32
#101 Mir Dim (mir0soft) 1093 (72404) 2017-03-20 18:40:33
#102 Raksha (Scorpio) 1093 (1093) 2017-03-23 02:40:47
#103 Nishanth Reddy (Nishi549) 1093 (1093) 2017-03-23 02:43:39
#104 Dominik M. (Sgt. Pepper) 1093 (97919) 2017-03-27 02:05:50
#105 chris (c2) 1093 (51973) 2017-03-27 09:16:07
#106 Daniel Walder (ibex) 1093 (14372) 2017-05-03 22:36:07
#107 Kasia (kasia-tutej) 1092 (53366) 2017-06-27 09:28:49
#108 D3d4lu5 (D3d4lu5) 1092 (273573) 2017-07-05 01:06:51
#109 S P (sp314) 1092 (1092) 2017-08-02 02:33:44
#110 Kim H. S. (tenchijin) 1092 (25468) 2017-08-23 18:21:11
#111 Martin (martinbucher) 1091 (27363) 2017-10-29 14:50:57
#112 Julian (Lemmynator) 1089 (16666) 2018-07-27 15:52:15
#113 Random Dude (rnd) 1088 (83811) 2018-08-21 23:12:34
#114 zuben c3 (zuben-c3) 1087 (24853) 2019-01-12 09:32:48
#115 Michael (FoM) 1087 (34465) 2019-01-26 18:04:36
#116 Mike (RogueRamblers) 1087 (12437) 2019-03-16 07:03:20
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Zodiac Cipher

[stamp-03] - 74 users already solved this challenge, 37 are working on it.
 
 
 

In the late 1960s the so called Zodiac killer used a homophonic substitution encryption to encrypt letters to the police and the press. This challenge is inspired by the solved Zodiac-408 problem and the unsolved Zodiac-340 problem.

Hint: Provide the codeword in 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: 15

All successful users of this challenge

Rank User (#74) Achieved points (Global score) y-m-d - h:m:s

Nobody (nobody) 200 (40618) 2010-10-14 14:01:08
Simon Jakob (simon.jakob) 200 (18714) 2010-10-15 01:29:28
deepy (deepy) 133 (266) 2010-10-16 23:02:02
un known (unknown) 133 (5466) 2010-10-17 12:27:57
#5 Karl Zufrieden (karlzufrieden) 125 (250) 2010-10-18 04:14:44
#6 Marcus Lipski (Mlipski) 120 (245) 2010-10-18 13:50:38
#7 Philipp Berger (ThE_-_BliZZarD) 120 (354) 2010-10-18 14:36:12
#8 Tom Erlang (ter85) 120 (1019) 2010-10-18 17:03:43
#9 Udi Taren (uditaren) 117 (351) 2010-10-20 01:14:25
#10 Pavel Charvat (PC!) 117 (234) 2010-10-20 12:41:54
#11 Ralf Stephan (rwst) 109 (25229) 2010-10-24 20:16:00
#12 Thomas Mattel (Tom) 106 (2462) 2010-10-31 22:13:40
#13 Jörg-Bernd Linnhoff (joberlin) 105 (661) 2010-11-02 17:27:21
#14 Arnold Sendler (Tschighor) 105 (1105) 2010-11-04 22:36:32
#15 Roadrunner (rr) 103 (12702) 2010-11-15 15:57:04
#16 Carsten Baum (crashti) 103 (1135) 2010-11-22 16:54:27
#17 Thomas Gonda (TomG) 102 (36291) 2010-12-08 13:49:49
#18 Flip (Flip) 101 (31107) 2011-02-08 22:28:09
#19 Wombat (Wombat) 101 (5822) 2011-04-25 07:06:55
#20 Egon Hamburger (Seehase) 100 (3445) 2011-06-08 18:28:04
#21 Seth Kintigh (DarkFibre) 100 (79471) 2011-06-14 01:38:10
#22 Stefan Haas (stef_the_chef) 100 (4329) 2011-07-23 19:42:17
#23 Daniel Fretwell (fretty) 100 (30107) 2011-08-01 22:15:47
#24 J. M. (jomandi) 100 (113270) 2011-09-21 00:08:07
#25 Viktor (Veselovský) 100 (151602) 2011-10-19 18:23:21
#26 Nathan (Witten) 100 (25326) 2011-12-12 23:39:00
#27 Dusan (xxdradus) 100 (40236) 2012-04-03 09:02:16
#28 Thomas Bollmeier (DrBolle) 100 (200) 2012-04-19 00:28:19
#29 Tim Schwimm (timschwimm) 100 (100) 2012-05-06 17:34:05
#30 E.T (Ertheb) 100 (78180) 2012-07-31 13:04:56
#31 Armin Krauss (argh) 100 (185115) 2012-08-26 19:40:13
#32 Harry (Schwabenbambi) 100 (2409) 2012-09-14 17:44:55
#33 Hannes (Hartmann) 100 (8680) 2012-09-19 14:04:57
#34 Kurt Gebauer (Yokozuna) 100 (153663) 2012-10-07 22:47:31
#35 H. Lautenschlager (helmi) 100 (32747) 2012-10-11 10:42:25
#36 Bart den Hartog (Bart13) 100 (118984) 2012-11-21 12:10:19
#37 Luigi Tomelli (archstanton) 100 (108345) 2013-03-12 13:10:18
#38 masam (jimboo) 100 (18687) 2013-03-30 01:25:59
#39 Jörg Schwarzwälder (secuso) 100 (2125) 2013-05-06 21:28:01
#40 Sebastian Kluge (zappo) 100 (1801) 2013-09-08 18:21:54
#41 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-09-09 09:22:32
#42 Erich (ErichSt) 100 (4862) 2013-10-01 17:42:01
#43 George (Theofanidis) 100 (106715) 2013-11-02 10:39:07
#44 KW (qwer*) 100 (13963) 2013-12-09 19:32:53
#45 Alain (Integral) 100 (207924) 2014-01-03 12:05:30
#46 Marcel (bene1512) 100 (20896) 2014-01-30 14:11:49
#47 Snake (snk) 100 (77889) 2014-06-15 19:08:01
#48 Robert (rm) 100 (56475) 2014-07-31 23:09:11
#49 Julia Bernotat (El Greco ) 100 (81129) 2014-08-02 12:28:36
#50 Andreas Frerichs (Ossili) 100 (33266) 2014-09-05 13:37:27
#51 Francisco Moraes (fmoraes) 100 (90044) 2014-11-21 18:55:25
#52 HolgerK (HolgerK) 100 (25776) 2015-01-09 00:43:02
#53 Roland Schindler (dr.roland) 100 (403) 2015-01-11 15:42:26
#54 Pavel (haw) 100 (22728) 2015-02-08 22:54:34
#55 Steve (Samacian) 100 (23804) 2015-03-04 05:35:25
#56 Rainer Zufall (kiekuk) 100 (56786) 2015-04-20 17:33:17
#57 Defekt75 (Defekt75) 100 (4325) 2015-06-13 09:47:11
#58 Bernhard Gruber (bgr) 100 (22889) 2015-07-06 18:30:27
#59 Tradecraft (Tradecraft) 100 (5540) 2015-07-17 18:29:54
#60 Peter (TomBombadil) 100 (3417) 2015-09-02 15:05:53
#61 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-19 09:01:21
#62 Em Doulgerakis (Greko) 100 (124033) 2016-05-06 19:55:24
#63 Hans Joachim Girulat (joregi) 100 (33593) 2016-05-19 14:17:27
#64 Alain Collignon (vexilla72) 100 (87833) 2016-11-05 09:07:01
#65 Dominik M. (Sgt. Pepper) 100 (97919) 2017-04-01 18:03:08
#66 Mir Dim (mir0soft) 100 (72404) 2017-04-03 19:18:36
#67 Danny Higgins (hamster147) 100 (31494) 2017-04-23 20:28:24
#68 D3d4lu5 (D3d4lu5) 100 (273573) 2017-06-26 19:43:32
#69 George Lasry (george4096) 100 (299488) 2017-07-29 15:29:00
#70 Tim Fink (Magellan) 100 (4876) 2017-09-23 11:46:04
#71 Michael (FoM) 100 (34465) 2018-08-20 00:43:40
#72 Random Dude (rnd) 100 (83811) 2018-09-23 19:49:57
#73 Adrian Widmann (Horst753) 100 (100) 2018-11-03 13:03:44
#74 zuben c3 (zuben-c3) 100 (24853) 2018-12-29 14:12:49
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Enigma Part 2

[stamp-05] - 74 users already solved this challenge, 2 are working on it.
 
 
 

Decrypt the given ciphertext which is encrypted with the Enigma chiper. The key conists of the configuration of the stecker and the initial setting of the three rotors. Please give the letters in the key as 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: 15

All successful users of this challenge

Rank User (#74) Achieved points (Global score) y-m-d - h:m:s

Ralf Stephan (rwst) 1485 (25229) 2010-10-23 17:30:54
Thomas Schmucker (dg) 1469 (26066) 2010-10-24 20:18:22
Siggi Bartz (sbartz) 1469 (2892) 2010-10-25 12:12:59
Nabb (Nabb) 1423 (13670) 2010-10-28 14:30:50
#5 Roadrunner (rr) 1414 (12702) 2010-10-29 21:05:52
#6 TURINGBOMBE (TBREAKER) 1378 (10616) 2010-11-03 13:19:56
#7 Armin Krauss (argh) 1307 (185115) 2010-11-22 21:09:21
#8 David (aki321) 1224 (27482) 2011-02-01 13:33:14
#9 Thomas Gonda (TomG) 1202 (36291) 2011-03-20 10:11:48
#10 kyprizel (kyprizel) 1188 (20795) 2011-04-30 13:57:01
#11 J. M. (jomandi) 1174 (113270) 2011-06-29 23:51:04
#12 Seth Kintigh (DarkFibre) 1169 (79471) 2011-07-26 18:22:34
#13 Daniel Fretwell (fretty) 1167 (30107) 2011-08-09 19:18:01
#14 Peter Mustermann (Gummiboot) 1166 (60285) 2011-08-12 23:31:02
#15 Viktor (Veselovský) 1163 (151602) 2011-09-01 13:22:28
#16 Tom Tox (tox) 1146 (17708) 2012-02-02 20:11:42
#17 Kurt Gebauer (Yokozuna) 1140 (153663) 2012-04-07 17:10:18
#18 Thomas Lambert (lambert) 1140 (35237) 2012-04-07 19:06:49
#19 Michel Van Caneghem (vancan) 1139 (49719) 2012-04-29 15:00:09
#20 Luigi Tomelli (archstanton) 1137 (108345) 2012-05-23 22:52:08
#21 Dusan (xxdradus) 1137 (40236) 2012-06-01 10:07:04
#22 Bart den Hartog (Bart13) 1134 (118984) 2012-07-12 03:20:32
#23 Nikki Brandt (nikki) 1123 (2348) 2013-03-12 10:40:10
#24 George (Theofanidis) 1122 (106715) 2013-04-04 20:40:22
#25 RPH (derichard) 1122 (27044) 2013-04-04 23:39:51
#26 Los (Gurt) 1121 (2742) 2013-04-27 11:33:50
#27 E.T (Ertheb) 1120 (78180) 2013-05-23 21:04:28
#28 Almut (problelmo) 1118 (45992) 2013-07-12 19:59:20
#29 George Lasry (george4096) 1118 (299488) 2013-07-16 21:30:48
#30 chris_3stones (3stones) 1117 (37759) 2013-08-03 10:50:47
#31 zahir mohsen moradi (ariobarzan) 1117 (99757) 2013-08-25 16:15:21
#32 Em Doulgerakis (Greko) 1115 (124033) 2013-10-13 11:50:41
#33 Forrest Gump (Polyphem) 1115 (38763) 2013-11-02 01:14:37
#34 YOUNG (LEE) 1115 (1115) 2013-11-07 18:13:44
#35 Francisco Moraes (fmoraes) 1114 (90044) 2013-11-12 22:16:31
#36 Michael Möller (michaelm) 1114 (173129) 2013-11-27 20:29:11
#37 Norbert Paefgen (egebamyasi) 1114 (2728) 2013-11-27 21:08:05
#38 Jim Gillogly (Scryer) 1114 (21260) 2013-12-05 05:18:59
#39 Alain (Integral) 1113 (207924) 2014-01-13 15:11:36
#40 Snake (snk) 1109 (77889) 2014-06-06 12:50:29
#41 Bernhard Gruber (bgr) 1108 (22889) 2014-08-04 10:09:06
#42 julius gaius (julius) 1107 (25581) 2014-08-23 21:58:25
#43 Robert (rm) 1107 (56475) 2014-09-19 13:14:43
#44 jej (stationz) 1106 (4939) 2014-11-08 22:33:42
#45 Julia Bernotat (El Greco ) 1106 (81129) 2014-11-21 13:07:45
#46 Kai Ludwig (TalentRaspel) 1105 (15704) 2015-01-18 00:21:11
#47 Georgius Stolte (HazmatsFear) 1104 (15671) 2015-02-19 18:14:58
#48 Rainer Zufall (kiekuk) 1104 (56786) 2015-02-26 19:33:01
#49 S Combes (jerva) 1104 (99132) 2015-02-27 14:25:46
#50 Hans Joachim Girulat (joregi) 1103 (33593) 2015-04-10 01:34:51
#51 Karl Schutt (günter) 1103 (41550) 2015-04-11 14:03:05
#52 Michael Ammon (Ammonym) 1102 (7719) 2015-06-10 20:23:37
#53 KW (qwer*) 1100 (13963) 2015-09-14 19:26:29
#54 Claude Vaillancourt (Cl3v3r) 1100 (38351) 2015-10-05 17:40:02
#55 J-L Morel (Rossignol) 1100 (29125) 2015-10-17 16:23:53
#56 Alain Collignon (vexilla72) 1099 (87833) 2016-01-12 11:01:30
#57 Szabó Zoltán (szabo.z87) 1099 (55604) 2016-01-22 19:42:46
#58 Andreas Frerichs (Ossili) 1098 (33266) 2016-02-08 23:28:13
#59 Marco Manfredi (mkk9901) 1098 (17686) 2016-03-26 12:03:26
#60 Erik (Erox) 1097 (22651) 2016-04-17 16:56:11
#61 Norbert Biermann (Norbert) 1096 (45031) 2016-08-23 20:39:58
#62 Mirko Rendey (Biork) 1095 (6595) 2016-09-20 13:03:31
#63 HeinzelMann (Ohm) 1095 (5295) 2016-09-20 21:19:00
#64 Nicolas (nicosPavlov) 1095 (151166) 2016-10-16 11:47:54
#65 Rene (ion) 1094 (5617) 2017-02-02 20:37:54
#66 chris (c2) 1093 (51973) 2017-03-24 09:02:46
#67 Dominik M. (Sgt. Pepper) 1093 (97919) 2017-04-04 17:43:20
#68 Daniel Walder (ibex) 1093 (14372) 2017-05-06 01:17:48
#69 Mir Dim (mir0soft) 1093 (72404) 2017-05-08 21:50:52
#70 D3d4lu5 (D3d4lu5) 1092 (273573) 2017-07-05 01:32:47
#71 Random Dude (rnd) 1088 (83811) 2018-08-29 00:54:41
#72 Nofre Tete (noffi) 1087 (21921) 2019-01-08 01:07:50
#73 Michael (FoM) 1087 (34465) 2019-01-25 20:53:16
#74 Mike (RogueRamblers) 1087 (12437) 2019-03-16 02:47:41
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Brute-Force-Attack on Triple-DES with Reduced Key Space

[shoellhammer-01] - 155 users already solved this challenge, 3 are working on it.
 
 
 

In present-days knowledge Triple-DES is secure if a really random key is used. If the key is not random and a part of the key may be guessed, it is possible to get knowledge of the rest of the key with a feasible bruteforce attack.
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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: 5

All successful users of this challenge

Rank User (#155) Achieved points (Global score) y-m-d - h:m:s

v n (focus) 2000 (3510) 2010-10-15 03:15:10
kyprizel (kyprizel) 1725 (20795) 2010-10-16 20:24:47
Nabb (Nabb) 1660 (13670) 2010-10-18 07:48:43
Benjamin Jemlich (pcgod) 1613 (1858) 2010-10-18 15:06:44
#5 Mathias Herrmann (mazze) 1613 (3302) 2010-10-19 11:35:23
#6 Simon Jakob (simon.jakob) 1613 (18714) 2010-10-19 13:28:52
#7 Roadrunner (rr) 1576 (12702) 2010-10-19 18:10:07
#8 Thomas Schmucker (dg) 1576 (26066) 2010-10-19 20:41:42
#9 Ralf Stephan (rwst) 1547 (25229) 2010-10-20 19:07:42
#10 Sebastian Steinmann (teodoc) 1547 (5594) 2010-10-20 20:36:24
#11 un known (unknown) 1547 (5466) 2010-10-20 23:57:52
#12 Nobody (nobody) 1523 (40618) 2010-10-21 20:08:23
#13 Thomas Lambert (lambert) 1502 (35237) 2010-10-23 11:47:19
#14 Dennis Walter (Lotus) 1423 (6827) 2010-10-29 10:18:27
#15 Armin Krauss (argh) 1378 (185115) 2010-11-03 18:07:04
#16 Thomas Gonda (TomG) 1278 (36291) 2010-12-07 22:34:54
#17 mischa (mmisc) 1229 (22426) 2011-01-24 20:28:03
#18 Wolfgang Weisser (wowmyst) 1228 (33108) 2011-01-26 01:32:34
#19 David (aki321) 1222 (27482) 2011-02-04 09:29:05
#20 Jay Bee (jaybee) 1218 (1926) 2011-02-11 18:17:43
#21 Alan Dixon (NickBourbaki) 1212 (7761) 2011-02-22 13:54:58
#22 Fabian Bendun (benfa) 1211 (8697) 2011-02-26 11:35:34
#23 Roland Jansen (roland) 1187 (17607) 2011-05-04 10:29:50
#24 Peter Mustermann (Gummiboot) 1171 (60285) 2011-07-16 18:46:36
#25 Christian Inci (ch100) 1170 (9253) 2011-07-20 04:50:30
#26 J. M. (jomandi) 1170 (113270) 2011-07-20 17:48:49
#27 Robbt Neid (Das Tupel) 1169 (9403) 2011-07-27 02:08:45
#28 asdf1 asdf1 (asdf1) 1169 (1270) 2011-07-27 22:44:48
#29 Seth Kintigh (DarkFibre) 1169 (79471) 2011-07-28 06:26:00
#30 dbuq (dbuq) 1166 (22762) 2011-08-13 17:52:59
#31 Dano (Dano) 1165 (14610) 2011-08-21 00:49:50
#32 Nicolas Golubovic (qll) 1164 (14919) 2011-08-22 15:40:28
#33 h3po (h3po) 1164 (20433) 2011-08-22 15:58:12
#34 Daniel Fretwell (fretty) 1164 (30107) 2011-08-25 00:50:52
#35 Viktor (Veselovský) 1162 (151602) 2011-09-09 18:07:56
#36 Flip (Flip) 1162 (31107) 2011-09-09 21:17:25
#37 The Killer (Killer) 1159 (42393) 2011-10-02 13:59:44
#38 TURINGBOMBE (TBREAKER) 1157 (10616) 2011-10-16 19:50:28
#39 DirkS (Dustman) 1156 (8479) 2011-10-24 14:01:15
#40 Christian Matt (Luy) 1156 (9889) 2011-10-25 00:42:18
#41 Bart den Hartog (Bart13) 1152 (118984) 2011-11-27 21:31:38
#42 Keith Randall (randall77) 1151 (31011) 2011-12-06 23:47:48
#43 Hans Peter (hanspeter) 1145 (52256) 2012-02-16 00:00:30
#44 Luigi Tomelli (archstanton) 1142 (108345) 2012-03-15 13:39:06
#45 Fabian Hemmer (llan) 1142 (7842) 2012-03-24 01:46:01
#46 Jared (everkite) 1141 (1141) 2012-04-05 05:48:36
#47 Kurt Gebauer (Yokozuna) 1140 (153663) 2012-04-13 21:12:40
#48 Michel Van Caneghem (vancan) 1140 (49719) 2012-04-14 08:49:27
#49 Daniel Demmler (dd23) 1139 (8942) 2012-04-29 15:12:16
#50 Dusan (xxdradus) 1137 (40236) 2012-05-28 15:11:21
#51 Daniel Richter (TheHiveMind) 1136 (11147) 2012-06-17 00:07:37
#52 Jens (Norge) 1135 (3579) 2012-07-05 17:33:28
#53 Em Doulgerakis (Greko) 1133 (124033) 2012-07-28 10:36:03
#54 George (Theofanidis) 1133 (106715) 2012-07-29 18:07:28
#55 H. Lautenschlager (helmi) 1133 (32747) 2012-08-01 00:20:59
#56 chris_3stones (3stones) 1133 (37759) 2012-08-03 21:03:35
#57 Christopher Thiele (Deep-Sea) 1132 (2776) 2012-08-14 13:45:05
#58 RPH (derichard) 1130 (27044) 2012-09-18 01:30:59
#59 Stepan (m1sterx) 1129 (19165) 2012-10-10 18:42:17
#60 The Enigma (enigma) 1128 (14336) 2012-11-12 15:46:04
#61 E.T (Ertheb) 1128 (78180) 2012-11-12 19:17:02
#62 Wendell Echaluse (wendell) 1128 (1128) 2012-11-14 06:52:13
#63 zahir mohsen moradi (ariobarzan) 1118 (99757) 2013-07-06 17:07:59
#64 Philipp Hammer-Pohlau (phase2) 1118 (17981) 2013-07-24 10:38:41
#65 Almut (problelmo) 1118 (45992) 2013-07-30 22:42:10
#66 Forrest Gump (Polyphem) 1117 (38763) 2013-08-26 19:21:37
#67 Steve (Samacian) 1116 (23804) 2013-09-09 02:17:03
#68 Hank (hanky) 1116 (22859) 2013-09-26 00:42:03
#69 Gergely Simon (george314) 1116 (16555) 2013-09-28 16:10:52
#70 Alexander (cruachan) 1115 (16051) 2013-10-05 03:44:34
#71 Boris (Kaasu) 1115 (16566) 2013-10-25 15:33:08
#72 Jim Gillogly (Scryer) 1114 (21260) 2013-12-05 00:56:53
#73 George Lasry (george4096) 1114 (299488) 2013-12-10 03:47:46
#74 Francisco Moraes (fmoraes) 1114 (90044) 2013-12-10 18:41:40
#75 Nils (NiKo) 1113 (5055) 2013-12-19 14:46:39
#76 Brad (braddrew) 1113 (15878) 2013-12-24 08:33:05
#77 Alain (Integral) 1113 (207924) 2013-12-29 16:44:52
#78 Kim H. S. (tenchijin) 1112 (25468) 2014-01-30 08:34:10
#79 Pavel (haw) 1112 (22728) 2014-02-10 11:08:33
#80 Jacek (sawior) 1111 (3619) 2014-03-14 10:53:44
#81 masam (jimboo) 1111 (18687) 2014-03-29 21:57:34
#82 qaz (wsx) 1111 (1111) 2014-04-03 15:39:54
#83 caesar ([caesar]) 1111 (10738) 2014-04-03 15:40:48
#84 Karl Schutt (günter) 1110 (41550) 2014-04-28 00:30:35
#85 Snake (snk) 1109 (77889) 2014-05-27 08:36:39
#86 Javantea (Javantea) 1108 (40816) 2014-07-23 02:48:58
#87 julius gaius (julius) 1108 (25581) 2014-07-25 09:50:05
#88 Peter (51dc30ddc) 1108 (10916) 2014-07-26 21:35:12
#89 Robert (rm) 1108 (56475) 2014-07-31 23:11:43
#90 Tiloan (Tiloan) 1107 (3840) 2014-08-26 21:19:59
#91 Flo (sealth) 1107 (13472) 2014-09-06 15:15:48
#92 Jan (Keiken) 1106 (2717) 2014-10-10 01:12:37
#93 Julia Bernotat (El Greco ) 1105 (81129) 2014-12-17 19:31:02
#94 Kai Ludwig (TalentRaspel) 1105 (15704) 2015-01-15 18:13:20
#95 HolgerK (HolgerK) 1104 (25776) 2015-01-24 14:19:31
#96 Claude Vaillancourt (Cl3v3r) 1104 (38351) 2015-01-27 01:19:42
#97 S Combes (jerva) 1104 (99132) 2015-02-28 13:40:27
#98 Konstantin Golovan (SoulShaker) 1104 (14091) 2015-03-08 12:29:26
#99 Jie Chen (vmd) 1104 (3336) 2015-03-13 05:30:12
#100 lihao (gelihao609) 1103 (3335) 2015-03-17 23:39:55
#101 Rainer Zufall (kiekuk) 1103 (56786) 2015-04-07 22:18:11
#102 Erik (Erox) 1101 (22651) 2015-08-02 21:54:04
#103 J-L Morel (Rossignol) 1100 (29125) 2015-10-07 15:59:46
#104 Rainer (Rainer74) 1099 (8417) 2015-12-22 19:59:06
#105 Dominik M. (Sgt. Pepper) 1098 (97919) 2016-03-09 15:44:46
#106 Marco Manfredi (mkk9901) 1098 (17686) 2016-03-20 15:06:40
#107 Norbert Biermann (Norbert) 1096 (45031) 2016-08-01 20:50:45
#108 neko (neko) 1095 (7679) 2016-09-24 03:41:10
#109 ender (endered) 1095 (5478) 2016-09-27 03:37:10
#110 Nicolas (nicosPavlov) 1095 (151166) 2016-10-08 06:18:42
#111 Alain Collignon (vexilla72) 1095 (87833) 2016-10-08 13:14:46
#112 Martin (martinbucher) 1095 (27363) 2016-11-13 16:49:33
#113 Andreas Frerichs (Ossili) 1094 (33266) 2017-01-10 16:52:41
#114 Georgius Stolte (HazmatsFear) 1094 (15671) 2017-01-13 20:31:57
#115 Marcel (bene1512) 1094 (20896) 2017-01-15 21:43:20
#116 Tristan1473 (Tristan1473) 1094 (18914) 2017-02-19 09:20:58
#117 Jochen Girulat (pyjoregi) 1094 (1094) 2017-03-06 22:34:23
#118 Hans Joachim Girulat (joregi) 1093 (33593) 2017-03-08 13:59:07
#119 Mir Dim (mir0soft) 1093 (72404) 2017-03-14 19:47:05
#120 chris (c2) 1093 (51973) 2017-03-26 17:48:17
#121 D3d4lu5 (D3d4lu5) 1092 (273573) 2017-06-23 14:09:05
#122 Kasia (kasia-tutej) 1092 (53366) 2017-06-25 21:32:50
#123 Tr0y (Tr0y) 1091 (3280) 2017-09-30 07:54:35
#124 Elpsycongroo (Elpsycongroo) 1091 (3280) 2017-10-08 09:51:50
#125 Caligo (caligo) 1091 (3280) 2017-10-09 12:48:06
#126 sdmncjkxcnjncsl (a363135) 1091 (3280) 2017-10-09 13:26:29
#127 denverb (DenverB) 1091 (1091) 2017-10-09 13:50:41
#128 xL (satom1) 1091 (2184) 2017-10-09 15:52:59
#129 wang5 (1phan) 1091 (3280) 2017-10-09 17:00:01
#130 Xiao_Xin (Xiao_Xin) 1091 (3280) 2017-10-13 16:08:18
#131 Mihail (plexor) 1090 (16827) 2018-02-06 20:25:07
#132 roehm (roehm) 1089 (5399) 2018-05-20 11:52:25
#133 wff1315 (wff) 1089 (1789) 2018-07-06 05:47:39
#134 panqi (pq) 1089 (1889) 2018-07-06 05:57:32
#135 E41514015 (E41514015) 1089 (2985) 2018-07-06 05:58:05
#136 E41514013 (E41514013) 1089 (4167) 2018-07-06 05:59:00
#137 E41514023 (E41514023) 1089 (3967) 2018-07-06 06:07:18
#138 E41514019 (E41514019) 1089 (2885) 2018-07-06 07:35:32
#139 E41514006 (E41514006) 1089 (4957) 2018-07-06 08:29:47
#140 Richi (Richi) 1089 (2385) 2018-07-06 08:40:22
#141 LQL (E41514067) 1089 (3180) 2018-07-06 10:10:12
#142 Random Dude (rnd) 1088 (83811) 2018-08-19 22:41:01
#143 Manfred Paul (manf) 1088 (14774) 2018-11-14 17:17:19
#144 Michael (FoM) 1087 (34465) 2019-01-25 00:13:56
#145 LoneWolf219 (LoneWolf219) 1087 (12795) 2019-03-09 22:38:17
#146 E41614048 (E41614048) 1087 (4063) 2019-03-23 15:31:56
#147 E41614056 (E41614056) 1087 (4062) 2019-03-25 12:18:57
#148 E41614043 (E41614043) 1087 (2780) 2019-03-26 14:12:08
#149 E41614031 (E41614031) 1087 (7526) 2019-03-27 16:45:33
#150 E41614019 (E41614019) 1087 (3075) 2019-03-27 17:42:46
#151 Tom GS (gousheng) 1087 (4368) 2019-03-27 17:47:31
#152 E41614014 (E41614014) 1087 (2875) 2019-03-28 02:14:36
#153 E41614018 (E41614018) 1087 (6243) 2019-03-28 05:41:10
#154 E41614005 (E41614005) 1087 (3175) 2019-03-29 08:15:50
#155 Klaus (kumaus) 1087 (21415) 2019-04-03 18:31:50
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   +++    [11:29 - 24.05.2019] dokyriak solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++    [11:16 - 24.05.2019] dokyriak solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [23:00 - 23.05.2019] Theofanidis solved the Level II challenge 'Handycipher made in love — Part 2'    +++    [19:57 - 23.05.2019] joregi solved the Level I challenge 'Autokey Cipher'    +++    [15:18 - 23.05.2019] Biork solved the Level I challenge 'A modified homophonic cipher with reduced alphabets — Part 1'    +++