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 (296)

Ordered by date posted, the most recent appear first.

Hybrid Encryption I

[kitrub-06] - 140 users already solved this challenge, 2 are working on it.
 
 
 

Hybrid encryption is widely used in practice. However, when using hybrid
encryption you should take care of certain details...
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: 2010-11-02 00:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#140) Achieved points (Global score) y-m-d - h:m:s

Nobody (nobody) 2000 (40618) 2010-11-02 22:36:17
Juan (kation) 1824 (6113) 2010-11-03 06:48:02
kyprizel (kyprizel) 1824 (20795) 2010-11-03 11:26:00
Thomas Schmucker (dg) 1824 (26066) 2010-11-03 19:20:13
#5 Claude Laveaux (claude.laveaux) 1824 (14504) 2010-11-03 21:24:56
#6 Roadrunner (rr) 1725 (12702) 2010-11-04 18:55:07
#7 Dennis Walter (Lotus) 1725 (6827) 2010-11-04 20:23:08
#8 Nabb (Nabb) 1660 (13670) 2010-11-05 14:50:54
#9 Armin Krauss (argh) 1502 (188214) 2010-11-10 08:39:31
#10 Cezary Glowacz (cezaryglowacz) 1485 (9995) 2010-11-11 15:53:45
#11 Ilya Ozerov (ilya) 1456 (20556) 2010-11-13 18:18:45
#12 Christian Inci (ch100) 1324 (9253) 2010-12-05 10:40:44
#13 Markus H. (maxxh) 1254 (3728) 2011-01-13 19:11:29
#14 Erik Rusek (Rusk) 1249 (3717) 2011-01-18 15:17:24
#15 Wolfgang Weisser (wowmyst) 1247 (33108) 2011-01-20 13:52:15
#16 mischa (mmisc) 1243 (22426) 2011-01-25 00:10:50
#17 Thomas Gonda (TomG) 1242 (36291) 2011-01-26 13:10:06
#18 David (aki321) 1235 (27482) 2011-02-04 15:55:34
#19 Timothy Lee (TLee) 1210 (1210) 2011-03-18 10:10:41
#20 v n (focus) 1205 (3510) 2011-03-29 01:21:14
#21 J. M. (jomandi) 1183 (113270) 2011-06-07 18:23:03
#22 Seth Kintigh (DarkFibre) 1172 (79471) 2011-07-30 18:27:32
#23 Viktor (Veselovský) 1170 (155163) 2011-08-09 13:10:24
#24 Daniel Fretwell (fretty) 1170 (30107) 2011-08-09 14:58:08
#25 Dano (Dano) 1169 (14610) 2011-08-11 15:53:37
#26 Peter Mustermann (Gummiboot) 1169 (60285) 2011-08-13 01:11:09
#27 dbuq (dbuq) 1168 (22762) 2011-08-21 15:31:34
#28 Nicolas Golubovic (qll) 1168 (14919) 2011-08-22 00:26:36
#29 h3po (h3po) 1167 (20433) 2011-08-24 17:50:06
#30 The Killer (Killer) 1166 (42393) 2011-08-31 01:37:00
#31 Thomas Lambert (lambert) 1158 (35237) 2011-10-30 11:38:30
#32 Christian Matt (Luy) 1157 (9889) 2011-11-01 21:59:37
#33 Bart den Hartog (Bart13) 1154 (144081) 2011-11-28 00:38:06
#34 Michel Van Caneghem (vancan) 1146 (49719) 2012-02-13 22:09:21
#35 Luigi Tomelli (archstanton) 1144 (108345) 2012-03-15 09:44:08
#36 Kurt Gebauer (Yokozuna) 1142 (177433) 2012-04-04 01:17:55
#37 Hans Peter (hanspeter) 1142 (52256) 2012-04-12 11:22:06
#38 Keith Randall (randall77) 1141 (31011) 2012-04-13 04:23:55
#39 Daniel Demmler (dd23) 1140 (8942) 2012-04-28 22:02:41
#40 Dusan (xxdradus) 1138 (40236) 2012-05-31 14:43:11
#41 Daniel Richter (TheHiveMind) 1137 (11147) 2012-06-19 00:53:50
#42 zuben c3 (zuben-c3) 1136 (24853) 2012-06-29 13:47:37
#43 George (Theofanidis) 1136 (113380) 2012-06-29 19:10:06
#44 Em Doulgerakis (Greko) 1134 (131437) 2012-07-26 09:15:29
#45 Christian (Etschupu) 1134 (31788) 2012-07-27 13:43:47
#46 chris_3stones (3stones) 1134 (37759) 2012-08-03 21:04:30
#47 RPH (derichard) 1131 (27044) 2012-09-16 16:56:49
#48 Rex (T-) 1129 (1129) 2012-10-30 07:12:10
#49 hardikkumar (hardik) 1129 (1129) 2012-10-30 07:12:51
#50 E.T (Ertheb) 1129 (81809) 2012-10-30 20:00:47
#51 Ashwin (t_o_x_i_c) 1129 (1129) 2012-11-10 00:38:27
#52 The Enigma (enigma) 1129 (14336) 2012-11-12 19:52:30
#53 zahir mohsen moradi (ariobarzan) 1125 (99757) 2013-02-07 00:16:01
#54 Dhwanil (Ddk1989) 1123 (1723) 2013-03-22 18:01:06
#55 Shailesh Padave (shaileshpadave) 1123 (2261) 2013-03-22 20:44:24
#56 Anubhuti Chaudhary (anubhuti_148) 1123 (1123) 2013-03-23 16:32:28
#57 mk (bilbobeutlin) 1122 (12340) 2013-04-09 21:50:35
#58 Velko Nikolov (staafl) 1122 (13467) 2013-04-20 01:46:46
#59 Almut (problelmo) 1119 (45992) 2013-07-03 23:03:59
#60 Philipp Hammer-Pohlau (phase2) 1118 (17981) 2013-07-23 19:25:32
#61 Ralf Stephan (rwst) 1118 (25229) 2013-07-30 12:16:04
#62 masam (jimboo) 1117 (18687) 2013-08-22 01:51:55
#63 Steve (Samacian) 1117 (23804) 2013-09-10 07:32:04
#64 Gergely Simon (george314) 1116 (16555) 2013-09-27 22:46:32
#65 Alexander (cruachan) 1116 (16051) 2013-10-06 01:52:59
#66 Hank (hanky) 1116 (22959) 2013-10-06 15:47:47
#67 Snake (snk) 1116 (86245) 2013-10-10 19:42:27
#68 Forrest Gump (Polyphem) 1116 (38763) 2013-10-12 20:46:20
#69 Boris (Kaasu) 1116 (16566) 2013-10-20 20:47:20
#70 kevin (krs425) 1115 (1115) 2013-11-04 04:04:24
#71 Brad (braddrew) 1114 (15878) 2013-12-20 13:02:47
#72 jonathan (munz) 1114 (8954) 2013-12-30 22:32:28
#73 Alain (Integral) 1113 (207924) 2014-01-07 11:04:19
#74 Pavel (haw) 1113 (22728) 2014-01-13 12:37:19
#75 Kim H. S. (tenchijin) 1112 (25468) 2014-03-12 08:35:42
#76 hellman (hellman) 1112 (14862) 2014-03-12 16:50:36
#77 caesar ([caesar]) 1111 (10738) 2014-03-24 16:16:15
#78 Karl Schutt (günter) 1111 (41550) 2014-04-05 21:18:54
#79 Igor (idipaolo) 1110 (10639) 2014-05-25 17:03:37
#80 Peter (51dc30ddc) 1108 (10916) 2014-07-27 23:08:55
#81 julius gaius (julius) 1108 (25581) 2014-07-31 00:27:27
#82 Christof B. (beans90) 1108 (9488) 2014-08-16 22:55:53
#83 Robert (rm) 1107 (56475) 2014-09-19 01:21:03
#84 Francisco Moraes (fmoraes) 1106 (90044) 2014-11-05 14:55:56
#85 Javantea (Javantea) 1106 (40816) 2014-11-14 23:08:07
#86 Julia Bernotat (El Greco ) 1106 (81129) 2014-11-26 22:42:34
#87 Kai Ludwig (TalentRaspel) 1105 (15704) 2015-01-17 22:36:43
#88 Claude Vaillancourt (Cl3v3r) 1105 (38351) 2015-01-27 17:58:58
#89 Konstantin Golovan (SoulShaker) 1104 (14091) 2015-03-08 19:37:45
#90 Dennis (skysurfer720) 1104 (1104) 2015-03-20 06:10:25
#91 Rainer Zufall (kiekuk) 1103 (56786) 2015-04-07 16:01:39
#92 Erik (Erox) 1101 (26141) 2015-08-03 12:45:13
#93 Sean (Kavanaugh) 1101 (29143) 2015-08-10 21:05:38
#94 S Combes (jerva) 1100 (99132) 2015-10-29 17:52:18
#95 Szabó Zoltán (szabo.z87) 1100 (55604) 2015-11-18 16:03:01
#96 Alain Collignon (vexilla72) 1100 (96903) 2015-11-23 14:03:48
#97 Dominik M. (Sgt. Pepper) 1099 (97919) 2016-01-21 18:10:47
#98 Marco Manfredi (mkk9901) 1098 (17686) 2016-03-15 14:41:33
#99 Guruswamy Nellaivadivelu (guruvadivelu) 1098 (1098) 2016-03-16 20:56:35
#100 Praveen (praveen.subramaniyam) 1098 (1098) 2016-03-16 21:00:36
#101 Norbert Biermann (Norbert) 1096 (45031) 2016-08-01 15:19:05
#102 Flo (sealth) 1096 (13472) 2016-08-22 14:48:30
#103 Nicolas (nicosPavlov) 1096 (151166) 2016-10-02 09:25:20
#104 neko (neko) 1095 (7679) 2016-11-19 13:44:47
#105 ender (endered) 1095 (5478) 2016-11-19 14:44:12
#106 Simon Jakob (simon.jakob) 1095 (18714) 2016-11-21 11:23:44
#107 Marcel (bene1512) 1094 (20896) 2017-01-03 17:07:06
#108 digiter (digiter1) 1094 (2187) 2017-02-22 06:03:39
#109 Tristan1473 (Tristan1473) 1094 (18914) 2017-02-22 10:00:30
#110 Hans Joachim Girulat (joregi) 1094 (36278) 2017-03-02 18:15:09
#111 Venkatesh Ramanujam Rangarajan (venki1092) 1094 (1094) 2017-03-14 20:47:58
#112 chris (c2) 1094 (51973) 2017-03-17 16:21:57
#113 Mir Dim (mir0soft) 1094 (72404) 2017-03-18 07:45:42
#114 Kasia (kasia-tutej) 1093 (53366) 2017-05-30 14:25:39
#115 john doe (misio) 1093 (7371) 2017-05-30 18:25:03
#116 Mihail (plexor) 1093 (16827) 2017-06-08 22:26:14
#117 D3d4lu5 (D3d4lu5) 1093 (297709) 2017-06-16 02:23:24
#118 George Lasry (george4096) 1092 (302230) 2017-07-29 23:16:34
#119 Akonia (Akonia12) 1092 (12153) 2017-07-31 17:19:37
#120 Akhil (simply.akhil777@gmail.com) 1091 (1091) 2017-10-10 05:01:08
#121 Steve Vaillancourt (stvai2) 1089 (15041) 2018-05-13 15:59:32
#122 Eric (ExAstris) 1089 (27090) 2018-05-25 03:13:32
#123 Georgius Stolte (HazmatsFear) 1089 (15671) 2018-06-08 18:13:40
#124 Christophe BORELLY (cb34) 1089 (12358) 2018-06-15 09:18:25
#125 E41514006 (E41514006) 1089 (4957) 2018-07-10 13:57:39
#126 Julian (Lemmynator) 1089 (18353) 2018-08-02 14:51:42
#127 Random Dude (rnd) 1089 (97213) 2018-08-19 14:21:21
#128 Muthaiah Ramanathan (muthuram93) 1088 (1088) 2018-10-11 05:34:23
#129 Manfred Paul (manf) 1088 (14774) 2018-11-14 17:31:08
#130 Michael (FoM) 1087 (38953) 2019-01-29 02:46:37
#131 eschar (eschar) 1087 (3264) 2019-01-31 14:29:54
#132 LoneWolf219 (LoneWolf219) 1087 (12795) 2019-03-10 19:45:49
#133 Will (nitrow) 1087 (6807) 2019-03-21 17:22:29
#134 Klaus (kumaus) 1087 (21415) 2019-04-04 15:02:21
#135 E41614018 (E41614018) 1087 (6243) 2019-05-03 17:13:23
#136 Marco Cinelli (Snap) 1086 (28365) 2019-05-14 18:45:27
#137 Mike (RogueRamblers) 1086 (32275) 2019-06-10 23:06:00
#138 Eugene (lim0n) 1086 (67666) 2019-07-10 11:45:45
#139 yult (yult) 1086 (12185) 2019-07-14 14:35:05
#140 Stephan (Stephje1978) 1086 (26961) 2019-08-23 22:06:24
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Purple 1

[stamp-08] - 15 users already solved this challenge, 1 is working on it.
 
 
 

The Purple machine was the Japanese counterpart of the German Enigma machine.
Decrypt the given ciphertext which was encrypted with the Purple machine.
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: 2010-10-27 00:00
Maximum number of attempts for this challenge: 25

All successful users of this challenge

Rank User (#15) Achieved points (Global score) y-m-d - h:m:s

Peter Mustermann (Gummiboot) 1167 (60285) 2011-08-19 19:18:21
J. M. (jomandi) 1155 (113270) 2011-11-14 07:57:14
Seth Kintigh (DarkFibre) 1144 (79471) 2012-03-10 01:24:35
Luigi Tomelli (archstanton) 1118 (108345) 2013-07-20 17:56:20
#5 Kurt Gebauer (Yokozuna) 1115 (177433) 2013-11-02 12:51:51
#6 Alain (Integral) 1111 (207924) 2014-03-15 12:32:05
#7 George Lasry (george4096) 1110 (302230) 2014-05-02 02:40:29
#8 Bart den Hartog (Bart13) 1110 (144081) 2014-05-20 01:08:40
#9 Francisco Moraes (fmoraes) 1106 (90044) 2014-12-04 23:41:38
#10 George (Theofanidis) 1105 (113380) 2014-12-27 09:52:13
#11 zahir mohsen moradi (ariobarzan) 1100 (99757) 2015-10-07 04:31:43
#12 Nicolas (nicosPavlov) 1095 (151166) 2016-12-02 06:42:17
#13 chris (c2) 1093 (51973) 2017-03-31 18:08:54
#14 D3d4lu5 (D3d4lu5) 1092 (297709) 2017-09-03 12:15:11
#15 Mike (RogueRamblers) 1087 (32275) 2019-03-11 19:42:49
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Smartcard RSA

[kitrub-05] - 64 users already solved this challenge, 1 is working on it.
 
 
 

To achieve a very fast decryption in RSA, one might choose the secret key to be rather small. It should, however, not be too small, since then it might be possible to mount brute-force attacks. The same holds for variants like RSA-CRT.
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: 2010-10-25 17:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#64) Achieved points (Global score) y-m-d - h:m:s

Nobody (nobody) 2000 (40618) 2010-10-26 16:48:23
Cezary Glowacz (cezaryglowacz) 1824 (9995) 2010-10-27 11:47:29
Claude Laveaux (claude.laveaux) 1613 (14504) 2010-10-29 23:51:30
Christian (Etschupu) 1547 (31788) 2010-10-31 17:09:23
#5 Armin Krauss (argh) 1344 (188214) 2010-11-21 18:56:04
#6 Wolfgang Weisser (wowmyst) 1204 (33108) 2011-03-24 12:45:48
#7 mischa (mmisc) 1193 (22426) 2011-04-25 01:55:28
#8 J. M. (jomandi) 1169 (113270) 2011-08-03 20:41:17
#9 Flip (Flip) 1167 (31107) 2011-08-18 12:00:54
#10 Viktor (Veselovský) 1167 (155163) 2011-08-18 17:32:24
#11 Daniel Fretwell (fretty) 1167 (30107) 2011-08-18 21:43:37
#12 kyprizel (kyprizel) 1166 (20795) 2011-08-23 13:41:25
#13 Seth Kintigh (DarkFibre) 1166 (79471) 2011-08-24 19:39:55
#14 The Killer (Killer) 1165 (42393) 2011-08-31 01:53:23
#15 Keith Randall (randall77) 1152 (31011) 2011-12-06 19:17:07
#16 Peter Mustermann (Gummiboot) 1149 (60285) 2012-01-14 12:11:29
#17 Michel Van Caneghem (vancan) 1146 (49719) 2012-02-12 21:56:35
#18 h3po (h3po) 1146 (20433) 2012-02-14 22:03:26
#19 Bart den Hartog (Bart13) 1145 (144081) 2012-02-26 01:17:55
#20 prasad (pdeshpande) 1143 (1143) 2012-03-15 03:50:36
#21 Teja (Tamboli) 1143 (1143) 2012-03-15 03:52:15
#22 teja Tamboli (Teja) 1143 (1143) 2012-03-15 04:25:52
#23 prasad deshpande (prasaddeshpande) 1142 (1142) 2012-04-02 18:37:47
#24 Thomas Lambert (lambert) 1140 (35237) 2012-04-18 17:14:07
#25 Aliazer (Aliazer) 1140 (12314) 2012-04-22 22:03:32
#26 Luigi Tomelli (archstanton) 1138 (108345) 2012-05-19 10:30:39
#27 Kurt Gebauer (Yokozuna) 1130 (177433) 2012-10-10 23:05:11
#28 dbuq (dbuq) 1125 (22762) 2013-01-14 19:40:40
#29 Velko Nikolov (staafl) 1121 (13467) 2013-04-24 12:04:06
#30 Almut (problelmo) 1121 (45992) 2013-05-03 07:03:02
#31 zahir mohsen moradi (ariobarzan) 1117 (99757) 2013-08-15 18:40:40
#32 Forrest Gump (Polyphem) 1116 (38763) 2013-10-14 00:25:12
#33 Em Doulgerakis (Greko) 1115 (131437) 2013-10-23 17:47:02
#34 Gaurav Kasliwal (gauravkasliwal8) 1115 (1115) 2013-10-30 03:18:06
#35 Pushkar Umaranikar (pumaranikar) 1115 (1115) 2013-10-30 03:29:06
#36 Francisco Moraes (fmoraes) 1114 (90044) 2013-11-22 16:11:37
#37 George (Theofanidis) 1114 (113380) 2013-12-07 13:03:38
#38 Brad (braddrew) 1114 (15878) 2013-12-12 05:03:46
#39 Jacek (sawior) 1114 (3619) 2013-12-16 13:38:13
#40 Alain (Integral) 1112 (207924) 2014-02-08 15:01:46
#41 hellman (hellman) 1111 (14862) 2014-03-12 16:46:17
#42 Ben (Paulsen) 1110 (2421) 2014-04-27 17:47:25
#43 Thomas Schmucker (dg) 1110 (26066) 2014-05-13 22:14:04
#44 Team Srividhya & Shwetha (cryptiq) 1106 (1106) 2014-11-01 00:12:18
#45 Shweta Shweta (Shweta) 1106 (1106) 2014-11-01 00:21:01
#46 Robert (rm) 1106 (56475) 2014-12-02 23:38:39
#47 Sunita Suchita (shokeen14) 1104 (1104) 2015-03-15 06:03:15
#48 Javantea (Javantea) 1103 (40816) 2015-04-19 19:48:05
#49 Sean (Kavanaugh) 1101 (29143) 2015-08-24 21:10:52
#50 chris_3stones (3stones) 1100 (37759) 2015-11-07 10:52:33
#51 Szabó Zoltán (szabo.z87) 1100 (55604) 2015-11-17 09:50:58
#52 Julia Bernotat (El Greco ) 1100 (81129) 2015-11-18 17:30:25
#53 Dominik M. (Sgt. Pepper) 1099 (97919) 2015-12-23 12:00:59
#54 Norbert Biermann (Norbert) 1096 (45031) 2016-09-20 08:09:58
#55 Nicolas (nicosPavlov) 1094 (151166) 2016-12-22 21:04:32
#56 Mir Dim (mir0soft) 1093 (72404) 2017-04-02 20:00:03
#57 Kasia (kasia-tutej) 1093 (53366) 2017-06-01 10:48:51
#58 D3d4lu5 (D3d4lu5) 1092 (297709) 2017-07-27 18:09:02
#59 Godfrey Norton (Godfrey) 1090 (8162) 2018-04-10 13:22:25
#60 Manfred Paul (manf) 1088 (14774) 2018-11-14 18:51:11
#61 Random Dude (rnd) 1087 (97213) 2019-04-17 01:17:32
#62 ENOENT (ENOENT) 1086 (13478) 2019-06-02 18:33:00
#63 Marco Cinelli (Snap) 1086 (28365) 2019-06-04 01:54:49
#64 Erik (Erox) 1086 (26141) 2019-07-13 17:27:24
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Molehunt (Part 3/3)

[wacker-04] - 70 users already solved this challenge, 2 are working on it.
 
 
 

This is the final part of a 3-part challenge regarding the classical transposition. You can solve this challenge with pen and paper or by writing a small computer program. In this challenge, the plaintext was first encrypted with a monoalphabetic substitution cipher. After that, the result was encrypted a second time with the irregular columnar transposition to create the final ciphertext. The used key length for the columnar tranposition has less than 10 characters.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-10-23 20:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#70) Achieved points (Global score) y-m-d - h:m:s

Sebastian Steinmann (teodoc) 2000 (5594) 2010-10-24 00:33:45
Dennis Nolte (JokerX) 2000 (6177) 2010-10-24 14:50:54
Armin Krauss (argh) 1444 (188214) 2010-11-05 11:43:15
Roadrunner (rr) 1373 (12702) 2010-11-14 14:47:52
#5 Ulrich Armbrüster (uarmbruester) 1353 (7987) 2010-11-17 19:07:27
#6 Thomas Gonda (TomG) 1279 (36291) 2010-12-16 18:02:14
#7 David (aki321) 1224 (27482) 2011-02-09 21:11:33
#8 Wombat (Wombat) 1178 (5822) 2011-06-18 15:22:53
#9 J. M. (jomandi) 1175 (113270) 2011-07-02 22:09:05
#10 Daniel Fretwell (fretty) 1170 (30107) 2011-07-31 14:43:26
#11 Seth Kintigh (DarkFibre) 1170 (79471) 2011-07-31 21:33:41
#12 Michael Möller (michaelm) 1164 (175129) 2011-09-01 16:37:45
#13 Viktor (Veselovský) 1163 (155163) 2011-09-09 19:37:19
#14 Patrick Bieck (Peeweebee) 1160 (3366) 2011-10-06 12:38:17
#15 The Killer (Killer) 1154 (42393) 2011-11-16 04:01:12
#16 Bart den Hartog (Bart13) 1152 (144081) 2011-12-05 22:14:21
#17 ceec (ceec) 1150 (1350) 2011-12-27 22:04:58
#18 Jonas Pfeiffer (Jonas) 1149 (1349) 2012-01-05 17:31:28
#19 Peter Mustermann (Gummiboot) 1148 (60285) 2012-01-13 17:11:33
#20 Tom Tox (tox) 1147 (17708) 2012-01-23 22:32:29
#21 Kurt Gebauer (Yokozuna) 1143 (177433) 2012-03-18 21:23:44
#22 Hans Peter (hanspeter) 1142 (52256) 2012-04-02 10:21:12
#23 Dusan (xxdradus) 1140 (40236) 2012-04-17 12:02:53
#24 Michel Van Caneghem (vancan) 1137 (49719) 2012-06-07 11:22:37
#25 George (Theofanidis) 1127 (113380) 2012-12-02 20:32:05
#26 Em Doulgerakis (Greko) 1126 (131437) 2013-01-03 14:25:10
#27 RPH (derichard) 1123 (27044) 2013-03-18 18:21:18
#28 Luigi Tomelli (archstanton) 1123 (108345) 2013-03-21 13:56:03
#29 E.T (Ertheb) 1122 (81809) 2013-04-11 18:05:48
#30 Hansemann (hansemak) 1120 (3522) 2013-05-15 13:11:32
#31 Philipp Hammer-Pohlau (phase2) 1118 (17981) 2013-07-26 21:25:13
#32 Almut (problelmo) 1118 (45992) 2013-08-02 05:58:35
#33 zahir mohsen moradi (ariobarzan) 1117 (99757) 2013-08-30 14:19:14
#34 George Lasry (george4096) 1117 (302230) 2013-09-03 23:08:30
#35 Steve (Samacian) 1116 (23804) 2013-10-09 13:02:44
#36 Boris (Kaasu) 1115 (16566) 2013-10-31 14:38:05
#37 Jim Gillogly (Scryer) 1114 (21260) 2013-12-09 01:44:41
#38 Alain (Integral) 1114 (207924) 2013-12-16 17:33:54
#39 Kim H. S. (tenchijin) 1112 (25468) 2014-01-31 10:57:19
#40 Leon (War131) 1110 (1310) 2014-04-30 21:47:39
#41 Karl Schutt (günter) 1110 (41550) 2014-05-01 14:16:02
#42 Thomas Schmucker (dg) 1110 (26066) 2014-05-30 16:36:59
#43 Julia Bernotat (El Greco ) 1108 (81129) 2014-07-30 14:35:34
#44 julius gaius (julius) 1108 (25581) 2014-08-26 14:41:13
#45 Francisco Moraes (fmoraes) 1106 (90044) 2014-11-07 16:30:07
#46 HolgerK (HolgerK) 1106 (25776) 2014-12-06 17:03:48
#47 Robert (rm) 1105 (56475) 2014-12-15 18:42:34
#48 Bertold (bk) 1105 (9673) 2014-12-25 18:40:24
#49 chris_3stones (3stones) 1105 (37759) 2015-01-13 20:06:50
#50 Erik (Erox) 1101 (26141) 2015-08-04 22:01:36
#51 Szabó Zoltán (szabo.z87) 1100 (55604) 2015-11-24 07:35:52
#52 Marc (rcll0891) 1099 (24004) 2016-01-09 02:11:18
#53 Andreas Frerichs (Ossili) 1099 (33266) 2016-01-11 17:18:03
#54 Rainer Zufall (kiekuk) 1098 (56786) 2016-02-07 11:39:24
#55 J-L Morel (Rossignol) 1096 (29425) 2016-07-17 08:58:43
#56 Norbert Biermann (Norbert) 1096 (45031) 2016-09-16 15:42:23
#57 Nicolas (nicosPavlov) 1095 (151166) 2016-10-27 16:26:51
#58 Alain Collignon (vexilla72) 1095 (96903) 2016-11-05 09:47:43
#59 Snake (snk) 1095 (86245) 2016-12-18 16:12:02
#60 Dominik M. (Sgt. Pepper) 1094 (97919) 2017-02-27 23:37:10
#61 Daniel Walder (ibex) 1093 (14672) 2017-04-14 23:38:26
#62 D3d4lu5 (D3d4lu5) 1092 (297709) 2017-07-12 18:11:10
#63 Danny Higgins (hamster147) 1090 (38289) 2018-03-21 00:41:03
#64 sarah b (silva) 1088 (26264) 2018-09-16 16:27:02
#65 Random Dude (rnd) 1088 (97213) 2018-10-10 02:22:25
#66 zuben c3 (zuben-c3) 1088 (24853) 2018-12-17 13:59:00
#67 Michael (FoM) 1087 (38953) 2019-03-15 10:02:57
#68 Stephan (Stephje1978) 1086 (26961) 2019-07-14 19:31:51
#69 gerdw (gerdw) 1086 (30489) 2019-07-23 20:56:42
#70 Eugene (lim0n) 1085 (67666) 2019-10-06 12:35:54
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Molehunt (Part 2/3)

[wacker-03] - 123 users already solved this challenge, 6 are working on it.
 
 
 

This is part 2 of a 3-part challenge regarding the classical transposition. You can solve this challenge with pen and paper as well as with different software programs. To create the ciphertext the plaintext was first encrypted with a classical shift cipher. The result of this encryption was then further encrypted with a columnar transposition with a key length of less than 10 characters.
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-10-23 15:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#123) Achieved points (Global score) y-m-d - h:m:s

Sebastian Steinmann (teodoc) 200 (5594) 2010-10-23 23:32:16
Dennis Nolte (JokerX) 200 (6177) 2010-10-24 14:50:18
Armin Krauss (argh) 120 (188214) 2010-10-27 22:45:14
Stefan Kühne (subROUTINE) 120 (3595) 2010-10-28 14:02:05
#5 Hannes Kremmer (HannesKremmer) 117 (932) 2010-10-28 20:48:29
#6 Roland Jansen (roland) 105 (17607) 2010-11-10 14:55:37
#7 Roadrunner (rr) 105 (12702) 2010-11-13 14:20:55
#8 Ulrich Armbrüster (uarmbruester) 104 (7987) 2010-11-14 15:02:50
#9 mischa (mmisc) 104 (22426) 2010-11-17 01:55:23
#10 Lars Beckmann (larsbeck) 104 (518) 2010-11-18 20:51:11
#11 Bernd Freise (Xanhem) 103 (1154) 2010-11-21 15:44:41
#12 Thomas Gonda (TomG) 102 (36291) 2010-12-15 10:22:52
#13 Hans Rudolf (mutabor) 101 (3015) 2011-01-28 18:42:46
#14 David (aki321) 101 (27482) 2011-02-02 15:50:48
#15 Wombat (Wombat) 101 (5822) 2011-04-23 17:25:32
#16 Egon Hamburger (Seehase) 101 (3746) 2011-04-28 14:40:31
#17 Manfred Paul (anybody) 100 (606) 2011-06-23 13:38:46
#18 Seth Kintigh (DarkFibre) 100 (79471) 2011-06-30 23:56:59
#19 J. M. (jomandi) 100 (113270) 2011-07-02 20:41:36
#20 Robbt Neid (Das Tupel) 100 (9403) 2011-07-27 23:54:40
#21 Martin Bauser (stef_the_chef) 100 (4329) 2011-07-29 20:48:49
#22 Daniel Fretwell (fretty) 100 (30107) 2011-07-31 13:44:20
#23 dbuq (dbuq) 100 (22762) 2011-08-27 11:52:31
#24 Michael Möller (michaelm) 100 (175129) 2011-09-01 16:36:25
#25 Viktor (Veselovský) 100 (155163) 2011-09-05 16:44:16
#26 Patrick Bieck (Peeweebee) 100 (3366) 2011-10-06 12:36:44
#27 Bart den Hartog (Bart13) 100 (144081) 2011-11-08 01:25:54
#28 Peter Mustermann (Gummiboot) 100 (60285) 2011-12-17 23:45:16
#29 ceec (ceec) 100 (1350) 2011-12-23 17:29:28
#30 Jonas Pfeiffer (Jonas) 100 (1349) 2012-01-05 17:32:31
#31 Tom Tox (tox) 100 (17708) 2012-01-22 09:43:18
#32 Kurt Gebauer (Yokozuna) 100 (177433) 2012-03-16 22:47:30
#33 Michael Gürtler (michaelg) 100 (4128) 2012-03-27 16:38:12
#34 Hans Peter (hanspeter) 100 (52256) 2012-04-02 10:21:02
#35 chris_3stones (3stones) 100 (37759) 2012-04-11 11:04:46
#36 George (Theofanidis) 100 (113380) 2012-04-11 11:05:55
#37 Dusan (xxdradus) 100 (40236) 2012-04-16 14:47:49
#38 H. Lautenschlager (helmi) 100 (32947) 2012-05-06 12:11:34
#39 Michel Van Caneghem (vancan) 100 (49719) 2012-06-06 15:32:10
#40 Daniel Richter (TheHiveMind) 100 (11147) 2012-06-17 14:47:19
#41 Em Doulgerakis (Greko) 100 (131437) 2012-09-14 12:41:15
#42 Harry (Schwabenbambi) 100 (2409) 2012-09-26 09:58:59
#43 KW (qwer*) 100 (13963) 2012-10-31 21:32:52
#44 Stepan (m1sterx) 100 (19165) 2012-11-07 10:08:43
#45 Snake (snk) 100 (86245) 2013-03-08 13:22:11
#46 RPH (derichard) 100 (27044) 2013-03-18 15:26:04
#47 Luigi Tomelli (archstanton) 100 (108345) 2013-03-21 10:41:35
#48 E.T (Ertheb) 100 (81809) 2013-04-04 13:00:11
#49 swarmspider (swarmspider) 100 (4528) 2013-04-23 14:54:39
#50 Hansemann (hansemak) 100 (3522) 2013-05-15 12:22:20
#51 Almut (problelmo) 100 (45992) 2013-06-25 16:25:59
#52 Urs Gysler (Sansibar) 100 (3269) 2013-07-03 13:21:48
#53 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-07-26 20:29:42
#54 Hans Joachim Girulat (joregi) 100 (36278) 2013-08-28 21:24:48
#55 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-29 16:17:57
#56 George Lasry (george4096) 100 (302230) 2013-09-03 19:01:43
#57 Sebastian Kluge (zappo) 100 (1601) 2013-09-10 19:01:30
#58 Steve (Samacian) 100 (23804) 2013-10-01 07:15:06
#59 Bernhard Gruber (bgr) 100 (22889) 2013-10-01 20:24:57
#60 Alexander (cruachan) 100 (16051) 2013-10-21 19:20:59
#61 Boris (Kaasu) 100 (16566) 2013-10-31 10:39:03
#62 Jim Gillogly (Scryer) 100 (21260) 2013-12-09 01:14:15
#63 Francisco Moraes (fmoraes) 100 (90044) 2013-12-11 22:54:50
#64 Alain (Integral) 100 (207924) 2013-12-16 13:28:29
#65 cworstell (ace2) 100 (4870) 2013-12-23 17:39:42
#66 Claudi (bucaneros) 100 (701) 2014-01-28 20:59:10
#67 Kim H. S. (tenchijin) 100 (25468) 2014-01-31 08:58:22
#68 Forrest Gump (Polyphem) 100 (38763) 2014-01-31 21:10:32
#69 Marcel (bene1512) 100 (20896) 2014-02-10 21:20:53
#70 Pavel (haw) 100 (22728) 2014-02-11 14:51:47
#71 Sascha (The Hoddich) 100 (4350) 2014-02-24 11:11:41
#72 Samed Güner (doktorgibson) 100 (200) 2014-04-30 13:35:00
#73 Leon (War131) 100 (1310) 2014-04-30 21:30:32
#74 Karl Schutt (günter) 100 (41550) 2014-05-01 10:28:14
#75 Thomas Schmucker (dg) 100 (26066) 2014-05-30 15:34:23
#76 Julia Bernotat (El Greco ) 100 (81129) 2014-07-25 22:46:15
#77 julius gaius (julius) 100 (25581) 2014-07-26 15:38:39
#78 Robert (rm) 100 (56475) 2014-07-31 22:32:18
#79 Andreas Frerichs (Ossili) 100 (33266) 2014-09-15 14:19:38
#80 Tim Fink (Magellan) 100 (4876) 2014-11-16 10:27:13
#81 HolgerK (HolgerK) 100 (25776) 2014-12-06 17:03:17
#82 Bertold (bk) 100 (9673) 2014-12-19 21:30:24
#83 Rainer Zufall (kiekuk) 100 (56786) 2015-03-25 21:08:39
#84 Michael Ammon (Ammonym) 100 (7719) 2015-06-12 19:04:54
#85 Tradecraft (Tradecraft) 100 (5540) 2015-07-19 13:01:42
#86 Erik (Erox) 100 (26141) 2015-08-04 21:25:34
#87 Peter (TomBombadil) 100 (3417) 2015-09-22 19:26:03
#88 Michael Jeffrey (empjay) 100 (3004) 2015-10-01 14:03:32
#89 Alain Collignon (vexilla72) 100 (96903) 2015-11-06 16:55:08
#90 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-23 08:31:41
#91 Marc (rcll0891) 100 (24004) 2016-01-03 18:46:35
#92 Peter (Garnet) 100 (14234) 2016-06-02 12:00:56
#93 J-L Morel (Rossignol) 100 (29425) 2016-07-16 16:02:21
#94 Norbert Biermann (Norbert) 100 (45031) 2016-09-16 15:41:55
#95 Nicolas (nicosPavlov) 100 (151166) 2016-10-12 13:55:04
#96 Hajoe (Tintin-Muc) 100 (6923) 2016-11-06 09:11:55
#97 Michael (FoM) 100 (38953) 2016-12-19 09:56:57
#98 Tristan1473 (Tristan1473) 100 (18914) 2017-02-17 08:13:10
#99 Dominik M. (Sgt. Pepper) 100 (97919) 2017-02-27 22:36:17
#100 Mir Dim (mir0soft) 100 (72404) 2017-03-20 19:00:14
#101 chris (c2) 100 (51973) 2017-03-27 21:18:18
#102 Daniel Walder (ibex) 100 (14672) 2017-04-14 22:59:15
#103 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-10 14:49:22
#104 Lane Williams (planetlane) 100 (23948) 2018-01-12 03:07:34
#105 Sebastian Slupina (Grandwizard) 100 (10866) 2018-02-16 17:08:04
#106 JoGo (JoGo) 100 (11686) 2018-02-25 19:09:28
#107 Danny Higgins (hamster147) 100 (38289) 2018-03-11 10:45:23
#108 Eric (ExAstris) 100 (27090) 2018-05-26 01:56:44
#109 Random Dude (rnd) 100 (97213) 2018-07-15 21:47:00
#110 Julian (Lemmynator) 100 (18353) 2018-07-27 14:36:57
#111 Verocs (koromvirag) 100 (433) 2018-08-07 12:12:00
#112 sarah b (silva) 100 (26264) 2018-09-15 21:30:35
#113 Joerg G. (SnifferMaster) 100 (18154) 2018-09-28 17:06:43
#114 zuben c3 (zuben-c3) 100 (24853) 2018-12-16 11:27:00
#115 Nofre Tete (noffi) 100 (21921) 2019-01-07 20:50:23
#116 steven (steven18) 100 (3091) 2019-03-23 22:22:53
#117 Jeff (Fountain) 100 (8788) 2019-06-09 03:19:50
#118 Mike (RogueRamblers) 100 (32275) 2019-06-09 23:35:06
#119 Stephan (Stephje1978) 100 (26961) 2019-07-13 16:59:33
#120 gerdw (gerdw) 100 (30489) 2019-07-20 22:43:15
#121 david (sexton) 100 (2801) 2019-07-31 11:02:23
#122 ajg (ludimus) 100 (12114) 2019-08-07 23:03:20
#123 Eugene (lim0n) 100 (67666) 2019-09-19 16:22:03
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   +++    [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'    +++    [05:10 - 14.11.2019] Akuro solved the Level I challenge 'Letter to the Templars — Part 2'    +++    [04:54 - 14.11.2019] Akuro solved the Level I challenge 'Letter to the Templars — Part 1'    +++