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 (267)

Ordered by date posted, the most recent appear first.

Monoalphabetic substitution with camouflage — Part 3

[veselovsky-11] - 36 users already solved this challenge, 1 is working on it.
 
 
 

In this challenge a variant has been used that allows to benefit from the camouflage effect and get a ciphertext not longer than the plaintext.
Read more...

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

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-12-07 15:10
Maximum number of attempts for this challenge: 15

All successful users of this challenge

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

Armin Krauss (argh) 2000 (171390) 2011-12-08 14:37:32
Bart den Hartog (Bart13) 1824 (118984) 2011-12-08 17:06:12
David (aki321) 1824 (27482) 2011-12-08 18:35:40
The Killer (Killer) 1824 (42393) 2011-12-08 23:19:57
#5 J. M. (jomandi) 1824 (113270) 2011-12-09 02:46:03
#6 Nathan (Witten) 1660 (25326) 2011-12-10 20:34:40
#7 Peter Mustermann (Gummiboot) 1391 (60285) 2011-12-25 18:42:58
#8 Seth Kintigh (DarkFibre) 1242 (79471) 2012-03-01 21:43:28
#9 Michael Möller (michaelm) 1196 (167404) 2012-05-28 09:55:04
#10 Michel Van Caneghem (vancan) 1195 (49719) 2012-05-30 22:57:38
#11 Kurt Gebauer (Yokozuna) 1184 (142278) 2012-07-06 12:33:36
#12 Stepan (m1sterx) 1178 (19165) 2012-08-01 13:38:22
#13 Hans Peter (hanspeter) 1161 (52256) 2012-11-09 17:22:29
#14 zahir mohsen moradi (ariobarzan) 1134 (99757) 2013-08-30 17:36:51
#15 Alain (Integral) 1128 (207924) 2014-01-02 16:42:29
#16 Dusan (xxdradus) 1126 (40236) 2014-02-11 09:56:05
#17 George (Theofanidis) 1121 (101521) 2014-06-07 21:16:15
#18 Snake (snk) 1121 (67306) 2014-06-13 12:41:56
#19 Francisco Moraes (fmoraes) 1116 (90044) 2014-11-13 00:00:01
#20 Julia Bernotat (El Greco ) 1115 (81129) 2014-12-14 20:52:55
#21 HolgerK (HolgerK) 1111 (25776) 2015-05-13 18:35:52
#22 Robert (rm) 1109 (56475) 2015-07-21 20:37:22
#23 Em Doulgerakis (Greko) 1109 (124033) 2015-08-18 18:22:32
#24 Szabó Zoltán (szabo.z87) 1106 (55604) 2015-12-22 19:08:26
#25 Marc (rcll0891) 1105 (20690) 2016-03-03 00:01:25
#26 E.T (Ertheb) 1105 (70149) 2016-03-12 21:56:09
#27 Bernhard Gruber (bgr) 1102 (22889) 2016-08-04 19:29:48
#28 Rainer Zufall (kiekuk) 1102 (53834) 2016-08-04 22:22:24
#29 Andreas Frerichs (Ossili) 1102 (33266) 2016-08-17 20:39:33
#30 Norbert Biermann (Norbert) 1101 (44430) 2016-09-05 21:03:34
#31 Nicolas (nicosPavlov) 1100 (151166) 2016-11-21 04:58:57
#32 George Lasry (george4096) 1097 (287902) 2017-07-29 12:12:16
#33 D3d4lu5 (D3d4lu5) 1097 (183554) 2017-08-10 07:15:01
#34 Alain Collignon (vexilla72) 1094 (75089) 2018-03-12 19:42:43
#35 Dominik M. (Sgt. Pepper) 1093 (84103) 2018-07-16 13:06:38
#36 clyto (clytorock) 1092 (3195) 2018-11-04 17:02:43
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Monoalphabetic substitution with camouflage — Part 2

[veselovsky-10] - 38 users already solved this challenge.
 
 
 

In this challenge it is to test whether a monoalphabetic substitution with camouflage provides more security even though spaces were not removed prior to the encryption.
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: 2011-12-07 15:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#38) Achieved points (Global score) y-m-d - h:m:s

Bart den Hartog (Bart13) 1824 (118984) 2011-12-08 21:15:01
Armin Krauss (argh) 1824 (171390) 2011-12-08 21:48:33
J. M. (jomandi) 1824 (113270) 2011-12-09 00:14:03
The Killer (Killer) 1824 (42393) 2011-12-09 00:25:47
#5 David (aki321) 1547 (27482) 2011-12-13 16:08:45
#6 Nathan (Witten) 1547 (25326) 2011-12-13 21:43:00
#7 Peter Mustermann (Gummiboot) 1398 (60285) 2011-12-25 03:06:11
#8 Seth Kintigh (DarkFibre) 1242 (79471) 2012-03-01 19:26:39
#9 captp (bdcht) 1202 (5864) 2012-05-10 22:50:02
#10 Michel Van Caneghem (vancan) 1196 (49719) 2012-05-27 18:34:40
#11 Kurt Gebauer (Yokozuna) 1185 (142278) 2012-07-04 01:01:19
#12 Stepan (m1sterx) 1178 (19165) 2012-08-01 12:03:32
#13 Keith Randall (randall77) 1166 (31011) 2012-10-05 05:31:14
#14 Hans Peter (hanspeter) 1161 (52256) 2012-11-09 17:22:13
#15 Alain (Integral) 1128 (207924) 2014-01-02 19:34:09
#16 Dusan (xxdradus) 1127 (40236) 2014-01-22 15:13:03
#17 George (Theofanidis) 1121 (101521) 2014-06-06 22:15:07
#18 Snake (snk) 1121 (67306) 2014-06-11 19:24:44
#19 Francisco Moraes (fmoraes) 1116 (90044) 2014-11-12 20:11:06
#20 Julia Bernotat (El Greco ) 1115 (81129) 2014-12-13 00:56:31
#21 Hans Joachim Girulat (joregi) 1114 (33493) 2015-01-16 17:07:46
#22 HolgerK (HolgerK) 1112 (25776) 2015-04-18 15:33:41
#23 Robert (rm) 1109 (56475) 2015-07-20 22:52:12
#24 Em Doulgerakis (Greko) 1109 (124033) 2015-08-22 11:48:51
#25 zahir mohsen moradi (ariobarzan) 1108 (99757) 2015-09-01 13:31:17
#26 Szabó Zoltán (szabo.z87) 1106 (55604) 2015-12-22 13:46:23
#27 Marc (rcll0891) 1105 (20690) 2016-02-29 01:39:54
#28 Peter (Garnet) 1102 (14234) 2016-07-07 10:23:13
#29 Rainer Zufall (kiekuk) 1102 (53834) 2016-08-03 12:36:41
#30 Bernhard Gruber (bgr) 1102 (22889) 2016-08-03 13:32:47
#31 Andreas Frerichs (Ossili) 1102 (33266) 2016-08-17 20:30:22
#32 Norbert Biermann (Norbert) 1101 (44430) 2016-09-05 17:12:18
#33 Nicolas (nicosPavlov) 1100 (151166) 2016-11-20 17:12:41
#34 George Lasry (george4096) 1097 (287902) 2017-07-29 12:08:10
#35 D3d4lu5 (D3d4lu5) 1097 (183554) 2017-07-29 18:00:46
#36 Alain Collignon (vexilla72) 1094 (75089) 2018-03-12 10:58:18
#37 Dominik M. (Sgt. Pepper) 1093 (84103) 2018-07-17 19:54:36
#38 Random Dude (rnd) 1092 (67574) 2018-09-15 04:30:45
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Factorization Cipher — Part 2

[veselovsky-06] - 115 users already solved this challenge, 3 are working on it.
 
 
 

After making yourself familiar with the idea of this cipher in part 1 it is now time to attack a larger plaintext. The monoalphabetic cipher that has been applied on the plaintext before should be the least problem.
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: 2011-12-01 21:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#115) Achieved points (Global score) y-m-d - h:m:s

Keith Randall (randall77) 2000 (31011) 2011-12-02 01:04:36
Seth Kintigh (DarkFibre) 2000 (79471) 2011-12-02 06:35:42
Armin Krauss (argh) 2000 (171390) 2011-12-02 12:04:41
J. M. (jomandi) 2000 (113270) 2011-12-02 14:05:10
#5 The Killer (Killer) 1824 (42393) 2011-12-02 21:37:18
#6 Bart den Hartog (Bart13) 1660 (118984) 2011-12-05 11:14:13
#7 Annie (Annanasss) 1613 (6813) 2011-12-06 20:08:17
#8 Nathan (Witten) 1547 (25326) 2011-12-07 21:47:00
#9 Peter Mustermann (Gummiboot) 1367 (60285) 2011-12-24 20:11:53
#10 jacobian1729 (jacobian1729) 1344 (5584) 2011-12-29 20:15:44
#11 Matthias Schwarzkopf (MatzeAT) 1310 (2967) 2012-01-08 21:45:43
#12 Luigi Tomelli (archstanton) 1294 (106685) 2012-01-16 13:56:28
#13 David (aki321) 1284 (27482) 2012-01-20 21:16:35
#14 h3po (h3po) 1268 (20433) 2012-02-01 13:06:38
#15 Tom Tox (tox) 1254 (17708) 2012-02-12 12:45:50
#16 Michel Van Caneghem (vancan) 1236 (49719) 2012-03-03 19:36:52
#17 E.T (Ertheb) 1235 (70149) 2012-03-05 12:56:51
#18 Michael Gürtler (michaelg) 1230 (4128) 2012-03-10 21:04:14
#19 Thomas Lambert (lambert) 1228 (38594) 2012-03-14 20:51:35
#20 Hans Peter (hanspeter) 1223 (52256) 2012-03-22 09:25:53
#21 Kurt Gebauer (Yokozuna) 1222 (142278) 2012-03-22 21:19:42
#22 Martin Härterich (HaeM) 1221 (15149) 2012-03-26 16:48:30
#23 Christof B. (beans90) 1200 (9488) 2012-05-10 02:18:59
#24 Dusan (xxdradus) 1190 (40236) 2012-06-09 07:05:47
#25 Daniel Richter (TheHiveMind) 1189 (11147) 2012-06-13 11:06:07
#26 Peter Grosse-Hering (Peter) 1184 (8097) 2012-07-03 10:01:28
#27 Stepan (m1sterx) 1177 (19165) 2012-07-30 13:42:11
#28 RPH (derichard) 1169 (27044) 2012-09-10 16:12:31
#29 Fjodor Karamasow (Fjodor) 1163 (3326) 2012-10-17 18:11:24
#30 George (Theofanidis) 1161 (101521) 2012-10-30 03:43:43
#31 The Enigma (enigma) 1160 (14336) 2012-11-06 20:11:57
#32 dbuq (dbuq) 1152 (22762) 2013-01-14 16:02:03
#33 Michal Ambroz (xambroz) 1152 (2810) 2013-01-19 22:55:40
#34 zahir mohsen moradi (ariobarzan) 1150 (99757) 2013-01-30 16:51:10
#35 masam (jimboo) 1145 (18687) 2013-04-04 05:35:05
#36 mk (bilbobeutlin) 1144 (12340) 2013-04-07 20:09:49
#37 Hans Joachim Girulat (joregi) 1140 (33493) 2013-05-27 23:37:26
#38 Almut (problelmo) 1140 (45992) 2013-05-29 21:09:31
#39 Felix (Flix) 1140 (13712) 2013-06-03 00:29:07
#40 Philipp Hammer-Pohlau (phase2) 1136 (17981) 2013-07-24 14:39:31
#41 Pavel Kessler (pavel) 1136 (3791) 2013-07-26 19:05:00
#42 Forrest Gump (Polyphem) 1135 (38763) 2013-08-09 01:45:03
#43 Steve (Samacian) 1135 (23804) 2013-08-17 02:58:35
#44 Thomas Gonda (TomG) 1133 (36291) 2013-09-12 14:36:40
#45 Alexander (cruachan) 1133 (16051) 2013-09-26 21:41:37
#46 Gergely Simon (george314) 1132 (16555) 2013-10-05 16:34:03
#47 Francisco Moraes (fmoraes) 1130 (90044) 2013-11-06 00:03:37
#48 Em Doulgerakis (Greko) 1130 (124033) 2013-11-18 10:09:26
#49 Jim Gillogly (Scryer) 1129 (21260) 2013-12-09 00:40:16
#50 Alain (Integral) 1128 (207924) 2013-12-27 08:20:26
#51 Pavel (haw) 1127 (22728) 2014-01-16 20:32:26
#52 Ralf Stephan (rwst) 1126 (22735) 2014-02-09 10:49:54
#53 Shoukat (e195633) 1126 (10617) 2014-02-15 02:57:37
#54 Kim H. S. (tenchijin) 1125 (25468) 2014-03-03 14:59:51
#55 hellman (hellman) 1123 (14862) 2014-04-08 13:35:43
#56 Michael Doucha (mdou) 1123 (13757) 2014-04-11 18:53:28
#57 Simone (Momo) 1123 (5478) 2014-04-13 20:51:14
#58 Karl Schutt (günter) 1123 (39890) 2014-04-18 13:16:03
#59 Thomas Schmucker (dg) 1122 (26066) 2014-05-09 10:42:55
#60 baz (oneiron) 1119 (12353) 2014-07-30 02:07:21
#61 julius gaius (julius) 1119 (25581) 2014-08-04 20:58:33
#62 Flo (sealth) 1118 (13472) 2014-09-07 16:33:59
#63 artmagic (artmagic) 1118 (6298) 2014-09-11 22:00:30
#64 Snake (snk) 1118 (67306) 2014-09-12 14:11:46
#65 Robert (rm) 1117 (56475) 2014-10-10 02:50:48
#66 Señor Saturn (senorsaturn) 1116 (3344) 2014-10-23 01:51:56
#67 Julia Bernotat (El Greco ) 1116 (81129) 2014-11-08 00:29:40
#68 George Lasry (george4096) 1116 (287902) 2014-11-12 00:59:46
#69 Claude Vaillancourt (Cl3v3r) 1114 (38351) 2015-01-01 19:17:18
#70 Kai Ludwig (TalentRaspel) 1114 (15704) 2015-01-06 01:24:04
#71 Michael Möller (michaelm) 1114 (167404) 2015-01-09 19:42:11
#72 Andreas Frerichs (Ossili) 1114 (33266) 2015-01-28 23:13:47
#73 S Combes (jerva) 1113 (99132) 2015-01-31 20:12:35
#74 Danny Higgins (hamster147) 1113 (21817) 2015-02-02 20:33:56
#75 HolgerK (HolgerK) 1113 (25776) 2015-02-03 00:55:21
#76 T (Wagner) 1113 (16887) 2015-02-10 20:22:48
#77 Felix (codeflx) 1113 (1915) 2015-02-23 20:36:27
#78 Rainer Zufall (kiekuk) 1113 (53834) 2015-03-09 19:16:42
#79 Konstantin Golovan (SoulShaker) 1112 (14091) 2015-03-12 15:43:32
#80 Philippe ALLARD (Flobert) 1112 (4035) 2015-04-07 12:47:57
#81 Dave (compsec) 1110 (3631) 2015-06-09 02:05:07
#82 Erik (Erox) 1109 (22651) 2015-07-13 17:59:44
#83 J-L Morel (Rossignol) 1109 (29125) 2015-07-16 12:26:40
#84 Joerg G. (SnifferMaster) 1108 (17853) 2015-09-15 11:55:38
#85 Martin (martinbucher) 1107 (27363) 2015-10-29 15:51:05
#86 Alain Collignon (vexilla72) 1107 (75089) 2015-11-06 09:16:56
#87 chris_3stones (3stones) 1107 (37759) 2015-11-07 10:50:34
#88 Szabó Zoltán (szabo.z87) 1107 (55604) 2015-11-09 08:37:09
#89 Dominik M. (Sgt. Pepper) 1106 (84103) 2015-12-20 18:50:17
#90 Nofre Tete (noffi) 1105 (21921) 2016-02-01 13:42:48
#91 D (devilchn) 1105 (11142) 2016-02-09 14:20:40
#92 WF (f077) 1105 (6874) 2016-02-13 12:38:11
#93 Marco Manfredi (mkk9901) 1104 (17686) 2016-03-08 10:19:36
#94 Peter (Garnet) 1103 (14234) 2016-05-10 09:18:49
#95 Ignacio (Moebiusar) 1103 (7390) 2016-05-24 18:43:43
#96 Norbert Biermann (Norbert) 1102 (44430) 2016-07-10 18:50:20
#97 Nicolas (nicosPavlov) 1101 (151166) 2016-10-05 17:25:24
#98 Meine Registrierung (TryC3) 1101 (6045) 2016-10-26 14:33:33
#99 Ali Kanarie (Ali Kanarie) 1100 (1900) 2016-11-07 01:38:28
#100 Simon Jakob (simon.jakob) 1100 (18714) 2016-11-22 20:51:09
#101 Michael (FoM) 1099 (17771) 2017-02-12 09:07:36
#102 chris (c2) 1098 (51973) 2017-03-17 23:03:04
#103 Mir Dim (mir0soft) 1098 (72404) 2017-03-19 07:14:37
#104 Kasia (kasia-tutej) 1097 (53366) 2017-06-02 22:23:25
#105 D3d4lu5 (D3d4lu5) 1097 (183554) 2017-06-15 19:56:34
#106 Akonia (Akonia12) 1097 (12153) 2017-08-03 18:43:34
#107 Neeraj (xOmega) 1096 (1496) 2017-09-24 01:16:10
#108 Handrich (Handrich) 1095 (3494) 2017-11-17 22:46:26
#109 tamisrah (tamisrah) 1095 (3134) 2018-01-14 11:45:36
#110 Labhesh (dlabhesh) 1094 (1094) 2018-03-22 08:10:14
#111 Steve Vaillancourt (stvai2) 1093 (15041) 2018-05-20 13:30:12
#112 Julian (Lemmynator) 1092 (16666) 2018-08-04 01:36:54
#113 Random Dude (rnd) 1092 (67574) 2018-08-26 15:08:39
#114 Aniruddh (ANIR) 1092 (1192) 2018-10-10 01:12:48
#115 Manfred Paul (manf) 1091 (14774) 2018-11-14 17:43:36
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Unconcealed RSA messages

[veselovsky-05] - 39 users already solved this challenge, 3 are working on it.
 
 
 

A strange effect might occur if you encrypt a message using the RSA cipher: The encrypted message has got the same value as the plaintext. Can you find all of these unconcealed messages for the given public key?
Read more...

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

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-11-02 08:15
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#39) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (171390) 2011-11-02 16:49:59
J. M. (jomandi) 2000 (113270) 2011-11-03 01:58:19
Keith Randall (randall77) 1824 (31011) 2011-11-03 23:02:57
The Killer (Killer) 1725 (42393) 2011-11-04 23:01:43
#5 Christian Matt (Luy) 1456 (9889) 2011-11-14 01:32:16
#6 jacobian1729 (jacobian1729) 1235 (5584) 2012-02-04 23:37:02
#7 Seth Kintigh (DarkFibre) 1222 (79471) 2012-02-23 02:45:40
#8 Michel Van Caneghem (vancan) 1216 (49719) 2012-03-06 06:56:21
#9 Martin Härterich (HaeM) 1202 (15149) 2012-04-05 10:06:18
#10 Kurt Gebauer (Yokozuna) 1200 (142278) 2012-04-11 00:48:38
#11 Luigi Tomelli (archstanton) 1188 (106685) 2012-05-17 22:29:04
#12 Christian (Etschupu) 1175 (31788) 2012-07-09 13:53:42
#13 Bart den Hartog (Bart13) 1174 (118984) 2012-07-18 21:16:18
#14 Thomas Lambert (lambert) 1165 (38594) 2012-09-03 19:50:44
#15 George (Theofanidis) 1137 (101521) 2013-06-17 22:16:15
#16 Almut (problelmo) 1136 (45992) 2013-07-03 22:46:11
#17 Em Doulgerakis (Greko) 1136 (124033) 2013-07-08 11:19:40
#18 zahir mohsen moradi (ariobarzan) 1133 (99757) 2013-08-14 19:02:43
#19 Forrest Gump (Polyphem) 1132 (38763) 2013-09-09 01:13:53
#20 Francisco Moraes (fmoraes) 1128 (90044) 2013-11-29 17:59:10
#21 Alain (Integral) 1124 (207924) 2014-02-12 08:05:40
#22 Pavel (haw) 1124 (22728) 2014-02-13 11:53:33
#23 hellman (hellman) 1123 (14862) 2014-03-14 11:48:19
#24 Javantea (Javantea) 1115 (40816) 2014-11-13 21:30:52
#25 Julia Bernotat (El Greco ) 1114 (81129) 2014-12-10 15:54:09
#26 Sean (Kavanaugh) 1107 (29143) 2015-09-09 20:09:28
#27 Szabó Zoltán (szabo.z87) 1106 (55604) 2015-11-20 19:32:55
#28 Robert (rm) 1105 (56475) 2016-01-02 20:24:46
#29 Dominik M. (Sgt. Pepper) 1104 (84103) 2016-02-25 15:15:33
#30 Alain Collignon (vexilla72) 1104 (75089) 2016-03-11 18:27:02
#31 Norbert Biermann (Norbert) 1101 (44430) 2016-08-10 22:42:21
#32 Nicolas (nicosPavlov) 1100 (151166) 2016-11-08 04:12:37
#33 Tristan1473 (Tristan1473) 1099 (18914) 2017-02-12 09:04:08
#34 Mir Dim (mir0soft) 1098 (72404) 2017-04-02 14:40:41
#35 Kasia (kasia-tutej) 1097 (53366) 2017-06-06 19:26:17
#36 D3d4lu5 (D3d4lu5) 1096 (183554) 2017-07-28 17:59:18
#37 E.T (Ertheb) 1094 (70149) 2018-03-12 12:50:32
#38 Rainer Zufall (kiekuk) 1091 (53834) 2018-11-03 10:41:32
#39 Manfred Paul (manf) 1091 (14774) 2018-11-14 19:24:39
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Monoalphabetic substitution with camouflage — Part 1

[veselovsky-09] - 50 users already solved this challenge, 7 are working on it.
 
 
 

It is not difficult to break a monoalphabetic substitution but in this challenge an additional camouflage alphabet causes confusion.
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Published on: 2011-10-27 09:40
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#50) Achieved points (Global score) y-m-d - h:m:s

Seth Kintigh (DarkFibre) 117 (79471) 2011-11-01 17:02:28
Bart den Hartog (Bart13) 117 (118984) 2011-11-01 19:39:08
J. M. (jomandi) 113 (113270) 2011-11-03 19:31:49
Wombat (Wombat) 101 (5822) 2012-01-07 12:27:58
#5 Armin Krauss (argh) 101 (171390) 2012-02-11 16:28:07
#6 Michael Möller (michaelm) 101 (167404) 2012-04-18 16:27:15
#7 captp (bdcht) 101 (5864) 2012-05-08 13:53:31
#8 Michel Van Caneghem (vancan) 100 (49719) 2012-05-26 11:20:31
#9 Kurt Gebauer (Yokozuna) 100 (142278) 2012-08-01 00:16:05
#10 Stepan (m1sterx) 100 (19165) 2012-08-02 14:26:48
#11 Hans Peter (hanspeter) 100 (52256) 2012-11-09 17:21:44
#12 Julia Werdelmann (jw) 100 (10407) 2012-11-18 12:51:35
#13 Oliver Schneider (cenn81) 100 (1100) 2013-04-25 18:34:38
#14 Almut (problelmo) 100 (45992) 2013-05-17 21:06:21
#15 Luigi Tomelli (archstanton) 100 (106685) 2013-07-21 16:18:24
#16 Snake (snk) 100 (67306) 2013-08-05 10:46:49
#17 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-28 13:33:13
#18 Em Doulgerakis (Greko) 100 (124033) 2013-09-03 19:19:22
#19 Francisco Moraes (fmoraes) 100 (90044) 2013-11-28 00:03:12
#20 George (Theofanidis) 100 (101521) 2013-11-29 00:02:06
#21 Alain (Integral) 100 (207924) 2014-01-02 09:48:22
#22 Dusan (xxdradus) 100 (40236) 2014-01-31 10:46:28
#23 Marcel (bene1512) 100 (20896) 2014-02-04 21:46:01
#24 KW (qwer*) 100 (13963) 2014-03-20 20:58:38
#25 Karl Schutt (günter) 100 (39890) 2014-08-08 17:38:52
#26 Julia Bernotat (El Greco ) 100 (81129) 2014-08-28 00:07:46
#27 Pavel (haw) 100 (22728) 2014-12-17 23:10:35
#28 Hans Joachim Girulat (joregi) 100 (33493) 2015-01-12 21:13:49
#29 HolgerK (HolgerK) 100 (25776) 2015-04-17 21:39:35
#30 Robert (rm) 100 (56475) 2015-07-03 14:02:21
#31 Andreas Frerichs (Ossili) 100 (33266) 2015-07-09 21:48:33
#32 E.T (Ertheb) 100 (70149) 2015-07-19 05:04:45
#33 Javantea (Javantea) 100 (40816) 2015-08-21 03:30:29
#34 J-L Morel (Rossignol) 100 (29125) 2015-09-30 14:23:53
#35 Szabó Zoltán (szabo.z87) 100 (55604) 2015-12-20 16:31:06
#36 Rainer Zufall (kiekuk) 100 (53834) 2016-01-11 18:20:01
#37 Vidmantas (vidluk) 100 (2533) 2016-02-28 14:06:50
#38 Peter (Garnet) 100 (14234) 2016-03-31 09:47:32
#39 Bernhard Gruber (bgr) 100 (22889) 2016-08-02 15:41:19
#40 Norbert Biermann (Norbert) 100 (44430) 2016-09-05 09:22:50
#41 Dominik M. (Sgt. Pepper) 100 (84103) 2017-02-28 13:14:19
#42 Daniel Walder (ibex) 100 (14372) 2017-05-31 23:08:04
#43 D3d4lu5 (D3d4lu5) 100 (183554) 2017-07-08 21:04:51
#44 George Lasry (george4096) 100 (287902) 2017-07-29 11:54:18
#45 Alain Collignon (vexilla72) 100 (75089) 2017-12-08 17:53:31
#46 Nicolas (nicosPavlov) 100 (151166) 2018-02-04 13:58:10
#47 Eric (ExAstris) 100 (26990) 2018-05-30 03:55:10
#48 Random Dude (rnd) 100 (67574) 2018-09-13 03:02:59
#49 clyto (clytorock) 100 (3195) 2018-11-04 12:00:56
#50 Michael (FoM) 100 (17771) 2018-12-04 23:13:13
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