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 (269)

Ordered by date posted, the most recent appear first.

Typex — Part 1

[chang-01] - 21 users already solved this challenge, 1 is working on it.
 
 
 

The Typex cipher has been used in World War 2 as an alternative to the Enigma cipher. Find the key that was used in this challenge.
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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.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-02-28 14:02
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#21) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (175390) 2013-02-28 23:48:44
Kurt Gebauer (Yokozuna) 1725 (146278) 2013-03-03 01:19:38
J. M. (jomandi) 1613 (113270) 2013-03-04 15:08:24
Luigi Tomelli (archstanton) 1456 (108345) 2013-03-12 09:42:54
#5 Viktor (Veselovský) 1378 (142053) 2013-03-20 18:57:41
#6 George (Theofanidis) 1256 (101521) 2013-05-10 06:12:18
#7 DirkS (Dustman) 1253 (8479) 2013-05-13 07:57:32
#8 zahir mohsen moradi (ariobarzan) 1202 (99757) 2013-08-02 14:55:14
#9 Forrest Gump (Polyphem) 1184 (38763) 2013-09-28 22:28:07
#10 Bart den Hartog (Bart13) 1184 (118984) 2013-10-01 01:01:03
#11 E.T (Ertheb) 1170 (71517) 2013-12-03 18:37:24
#12 Alain (Integral) 1164 (207924) 2014-01-11 18:12:03
#13 Francisco Moraes (fmoraes) 1163 (90044) 2014-01-18 01:22:10
#14 George Lasry (george4096) 1151 (292103) 2014-04-26 09:59:24
#15 Claude Vaillancourt (Cl3v3r) 1120 (38351) 2015-09-22 12:54:04
#16 S Combes (jerva) 1120 (99132) 2015-10-09 23:37:30
#17 Karl Schutt (günter) 1118 (41550) 2015-12-05 13:59:52
#18 Nicolas (nicosPavlov) 1108 (151166) 2016-11-19 19:17:24
#19 WayneTW (skycckk) 1106 (1106) 2017-03-21 18:30:20
#20 D3d4lu5 (D3d4lu5) 1103 (260853) 2017-08-24 18:35:49
#21 Alain Collignon (vexilla72) 1095 (80284) 2019-03-05 08:37:12
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Multilingual Monoalphabetic Substitution

[theofanidis-04] - 61 users already solved this challenge, 6 are working on it.
 
 
 

The plaintext consists of English, French, German and Italian words. Can you identify the four sentences after you have solved the monoalphabetic substitution?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-01-30 14:27
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#61) Achieved points (Global score) y-m-d - h:m:s

E.T (Ertheb) 200 (71517) 2013-01-30 17:43:50
Armin Krauss (argh) 200 (175390) 2013-01-30 21:36:36
Viktor (Veselovský) 200 (142053) 2013-01-31 01:07:14
Snake (snk) 150 (72164) 2013-01-31 16:01:55
#5 kevin shaw (steggily) 150 (2298) 2013-02-01 13:37:29
#6 Iain Sharp (WoodenHedgehog) 150 (2196) 2013-02-01 13:40:17
#7 David (aki321) 150 (27482) 2013-02-01 13:50:33
#8 H. Lautenschlager (helmi) 125 (29022) 2013-02-02 20:48:07
#9 Kurt Gebauer (Yokozuna) 125 (146278) 2013-02-02 20:57:34
#10 J. M. (jomandi) 106 (113270) 2013-02-16 00:48:24
#11 Lucas Dreyer (luc4sdreyer) 104 (104) 2013-02-26 21:14:58
#12 Luigi Tomelli (archstanton) 103 (108345) 2013-02-28 10:46:15
#13 Kirill (ineaugh) 102 (1920) 2013-03-18 01:36:51
#14 Seth Kintigh (DarkFibre) 102 (79471) 2013-03-19 03:27:59
#15 Dusan (xxdradus) 102 (40236) 2013-03-25 19:37:31
#16 swarmspider (swarmspider) 101 (4528) 2013-04-22 15:17:40
#17 Jörg Schwarzwälder (secuso) 101 (2125) 2013-05-05 22:33:12
#18 Michael Möller (michaelm) 101 (169404) 2013-05-22 21:34:56
#19 Michel Van Caneghem (vancan) 101 (49719) 2013-07-30 09:35:09
#20 Em Doulgerakis (Greko) 100 (124033) 2013-09-10 10:07:51
#21 Bart den Hartog (Bart13) 100 (118984) 2013-09-14 16:06:53
#22 George Lasry (george4096) 100 (292103) 2013-12-03 03:30:40
#23 Alain (Integral) 100 (207924) 2013-12-15 19:39:56
#24 Marcel (bene1512) 100 (20896) 2014-02-07 17:45:06
#25 Sascha (The Hoddich) 100 (4350) 2014-03-03 14:09:56
#26 Karl Schutt (günter) 100 (41550) 2014-05-03 21:19:45
#27 Bernhard Gruber (bgr) 100 (22889) 2014-06-30 20:16:20
#28 Robert (rm) 100 (56475) 2014-07-31 23:00:23
#29 Julia Bernotat (El Greco ) 100 (81129) 2014-08-27 00:46:26
#30 Lane Williams (planetlane) 100 (21611) 2014-10-26 00:06:56
#31 Francisco Moraes (fmoraes) 100 (90044) 2014-10-31 15:18:52
#32 Tim Fink (Magellan) 100 (4876) 2014-12-31 11:22:38
#33 HolgerK (HolgerK) 100 (25776) 2015-01-15 22:28:40
#34 Georgius Stolte (HazmatsFear) 100 (15671) 2015-02-22 13:44:25
#35 Andreas Frerichs (Ossili) 100 (33266) 2015-03-20 17:55:16
#36 chris_3stones (3stones) 100 (37759) 2015-04-05 11:49:50
#37 partamier (yann) 100 (5435) 2015-05-16 11:57:17
#38 Hans Joachim Girulat (joregi) 100 (33493) 2015-06-02 17:04:10
#39 Michael Ammon (Ammonym) 100 (7719) 2015-06-21 00:41:42
#40 Rainer Zufall (kiekuk) 100 (56786) 2015-09-30 22:00:55
#41 Alain Collignon (vexilla72) 100 (80284) 2015-10-02 16:06:10
#42 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-21 15:17:49
#43 zahir mohsen moradi (ariobarzan) 100 (99757) 2016-05-30 21:23:31
#44 Peter (Garnet) 100 (14234) 2016-05-31 11:40:12
#45 J-L Morel (Rossignol) 100 (29125) 2016-07-23 19:27:21
#46 Norbert Biermann (Norbert) 100 (44430) 2016-09-15 15:36:45
#47 zuben c3 (zuben-c3) 100 (24853) 2016-11-21 18:15:11
#48 Nicolas (nicosPavlov) 100 (151166) 2017-01-24 17:27:54
#49 Dominik M. (Sgt. Pepper) 100 (89042) 2017-03-30 20:00:26
#50 sarah b (silva) 100 (14059) 2017-05-05 21:20:33
#51 Daniel Walder (ibex) 100 (14372) 2017-05-16 00:52:13
#52 Marc (rcll0891) 100 (22180) 2017-08-19 14:20:10
#53 Kim H. S. (tenchijin) 100 (25468) 2017-08-25 23:08:45
#54 D3d4lu5 (D3d4lu5) 100 (260853) 2017-08-26 07:11:26
#55 Ines (bufo01) 100 (4515) 2018-01-15 17:55:26
#56 Steve Vaillancourt (stvai2) 100 (15041) 2018-04-29 23:59:33
#57 Eric (ExAstris) 100 (26990) 2018-05-20 21:46:39
#58 Random Dude (rnd) 100 (77973) 2018-07-07 05:21:23
#59 Bertolo (Bertolo) 100 (7167) 2018-12-31 14:09:48
#60 Michael (FoM) 100 (34465) 2019-01-22 15:34:20
#61 Pierre Robier (tripleedged) 100 (5916) 2019-02-17 22:45:26
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Cascading Encryption — Part 1/3

[wacker-05] - 60 users already solved this challenge, 2 are working on it.
 
 
 

Can you break this cascading encryption that consists of a combination of substitution and transposition? The solution contains important information for the next parts.
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: 2013-01-25 15:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#60) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 200 (142053) 2013-01-25 15:50:34
Bart den Hartog (Bart13) 200 (118984) 2013-01-25 20:50:32
J. M. (jomandi) 200 (113270) 2013-01-26 02:06:04
Hans Peter (hanspeter) 200 (52256) 2013-01-26 03:09:36
#5 Armin Krauss (argh) 200 (175390) 2013-01-26 11:18:10
#6 E.T (Ertheb) 200 (71517) 2013-01-26 13:32:19
#7 Michel Van Caneghem (vancan) 150 (49719) 2013-01-26 20:46:17
#8 Kurt Gebauer (Yokozuna) 125 (146278) 2013-01-28 23:40:55
#9 Snake (snk) 102 (72164) 2013-03-08 12:09:45
#10 Kirill (ineaugh) 102 (1920) 2013-03-18 23:06:05
#11 Luigi Tomelli (archstanton) 102 (108345) 2013-03-19 09:09:56
#12 RPH (derichard) 102 (27044) 2013-03-28 22:30:05
#13 Seth Kintigh (DarkFibre) 102 (79471) 2013-03-29 02:24:00
#14 David (aki321) 102 (27482) 2013-03-30 15:27:57
#15 Thomas Lambert (lambert) 101 (35237) 2013-04-01 16:01:30
#16 Michael Möller (michaelm) 101 (169404) 2013-04-03 16:26:49
#17 George (Theofanidis) 101 (101521) 2013-04-10 15:05:02
#18 Hansemann (hansemak) 101 (3522) 2013-04-26 09:30:58
#19 Hans Joachim Girulat (joregi) 101 (33493) 2013-07-19 12:52:51
#20 Em Doulgerakis (Greko) 101 (124033) 2013-08-04 15:58:33
#21 George Lasry (george4096) 100 (292103) 2013-08-19 23:46:34
#22 Almut (problelmo) 100 (45992) 2013-08-27 16:48:36
#23 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-31 12:33:39
#24 Olga (headcrab) 100 (400) 2013-12-04 11:21:36
#25 Dusan (xxdradus) 100 (40236) 2013-12-14 11:09:09
#26 Alain (Integral) 100 (207924) 2014-01-04 21:58:54
#27 Marcel (bene1512) 100 (20896) 2014-02-03 21:56:52
#28 KW (qwer*) 100 (13963) 2014-02-15 22:02:20
#29 Sascha (The Hoddich) 100 (4350) 2014-03-07 12:05:03
#30 Karl Schutt (günter) 100 (41550) 2014-04-30 23:15:48
#31 Bernhard Gruber (bgr) 100 (22889) 2014-07-14 20:07:21
#32 Robert (rm) 100 (56475) 2014-07-31 22:59:25
#33 Julia Bernotat (El Greco ) 100 (81129) 2014-08-26 16:41:22
#34 julius gaius (julius) 100 (25581) 2014-08-30 18:31:58
#35 Tim Fink (Magellan) 100 (4876) 2014-11-03 16:27:24
#36 Bertold (bk) 100 (9673) 2014-11-05 21:43:31
#37 Francisco Moraes (fmoraes) 100 (90044) 2014-11-08 02:18:53
#38 Pavel (haw) 100 (22728) 2014-12-18 23:46:26
#39 Andreas Frerichs (Ossili) 100 (33266) 2015-02-18 19:49:45
#40 Rainer Zufall (kiekuk) 100 (56786) 2015-04-07 21:31:03
#41 Steve (Samacian) 100 (23804) 2015-05-28 09:19:18
#42 Szabó Zoltán (szabo.z87) 100 (55604) 2015-12-01 17:13:01
#43 Marc (rcll0891) 100 (22180) 2016-01-10 22:39:19
#44 Alain Collignon (vexilla72) 100 (80284) 2016-02-22 15:21:33
#45 HolgerK (HolgerK) 100 (25776) 2016-03-23 18:22:32
#46 J-L Morel (Rossignol) 100 (29125) 2016-07-18 16:52:04
#47 Nicolas (nicosPavlov) 100 (151166) 2016-10-24 16:43:10
#48 Peter (Garnet) 100 (14234) 2016-10-27 14:08:18
#49 zuben c3 (zuben-c3) 100 (24853) 2017-01-07 19:59:05
#50 Michael (FoM) 100 (34465) 2017-01-29 00:59:28
#51 Tristan1473 (Tristan1473) 100 (18914) 2017-02-23 18:52:10
#52 Dominik M. (Sgt. Pepper) 100 (89042) 2017-03-30 22:46:46
#53 Daniel Walder (ibex) 100 (14372) 2017-05-17 23:50:22
#54 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-10 15:40:34
#55 Lane Williams (planetlane) 100 (21611) 2018-01-10 23:01:41
#56 Ines (bufo01) 100 (4515) 2018-01-23 23:20:16
#57 Eric (ExAstris) 100 (26990) 2018-05-28 16:53:39
#58 Random Dude (rnd) 100 (77973) 2018-08-15 19:03:25
#59 sarah b (silva) 100 (14059) 2018-09-23 18:21:42
#60 Nofre Tete (noffi) 100 (21921) 2019-01-07 23:23:15
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Enigma Messages

[theofanidis-05] - 65 users already solved this challenge, 4 are working on it.
 
 
 

Can you find the plaintext using 26 Engima ciphertexts that have been encrypted with different rotors and different initial settings?
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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: 2013-01-23 15:32
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#65) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 200 (142053) 2013-01-23 18:33:36
E.T (Ertheb) 200 (71517) 2013-01-23 20:02:00
Armin Krauss (argh) 200 (175390) 2013-01-23 22:01:52
J. M. (jomandi) 200 (113270) 2013-01-23 23:06:08
#5 Hans Peter (hanspeter) 200 (52256) 2013-01-24 10:43:35
#6 Kurt Gebauer (Yokozuna) 200 (146278) 2013-01-24 12:33:56
#7 Bart den Hartog (Bart13) 150 (118984) 2013-01-24 16:40:41
#8 H. Lautenschlager (helmi) 150 (29022) 2013-01-24 17:16:21
#9 Roland Jansen (roland) 133 (17607) 2013-01-25 21:54:36
#10 Luigi Tomelli (archstanton) 117 (108345) 2013-01-29 13:38:09
#11 Em Doulgerakis (Greko) 103 (124033) 2013-02-23 12:29:26
#12 Nikki Brandt (nikki) 102 (2348) 2013-03-17 01:42:07
#13 Kirill (ineaugh) 102 (1920) 2013-03-19 23:15:35
#14 Almut (problelmo) 101 (45992) 2013-07-15 22:38:18
#15 George Lasry (george4096) 100 (292103) 2013-08-16 22:49:22
#16 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-09-08 19:13:24
#17 Hank (hanky) 100 (22859) 2013-10-01 00:05:29
#18 Timo (Amarth) 100 (831) 2013-10-12 15:59:59
#19 Steve (Samacian) 100 (23804) 2013-10-15 02:46:14
#20 Michael Möller (michaelm) 100 (169404) 2013-11-01 18:14:19
#21 Francisco Moraes (fmoraes) 100 (90044) 2013-11-12 16:25:12
#22 Norbert Paefgen (egebamyasi) 100 (2728) 2013-12-01 19:13:25
#23 Alain (Integral) 100 (207924) 2013-12-21 14:40:51
#24 Marcel (bene1512) 100 (20896) 2014-02-15 17:35:18
#25 Karl Schutt (günter) 100 (41550) 2014-04-21 10:52:21
#26 Michel Van Caneghem (vancan) 100 (49719) 2014-06-15 09:32:59
#27 Snake (snk) 100 (72164) 2014-06-27 09:15:04
#28 Robert (rm) 100 (56475) 2014-07-31 22:52:04
#29 Pavel Kessler (pavel) 100 (3791) 2014-07-31 23:10:42
#30 julius gaius (julius) 100 (25581) 2014-08-16 07:28:58
#31 jej (stationz) 100 (4939) 2014-11-10 10:47:14
#32 Julia Bernotat (El Greco ) 100 (81129) 2014-11-17 18:33:19
#33 S Combes (jerva) 100 (99132) 2015-01-25 22:29:25
#34 Dusan (xxdradus) 100 (40236) 2015-02-16 13:41:11
#35 Rainer Zufall (kiekuk) 100 (56786) 2015-02-20 18:02:17
#36 Georgius Stolte (HazmatsFear) 100 (15671) 2015-02-23 19:18:57
#37 TURINGBOMBE (TBREAKER) 100 (10616) 2015-03-04 04:24:12
#38 Andreas Frerichs (Ossili) 100 (33266) 2015-05-29 16:10:39
#39 KW (qwer*) 100 (13963) 2015-06-13 09:12:37
#40 Hans Joachim Girulat (joregi) 100 (33493) 2015-07-08 22:53:22
#41 Bernhard Gruber (bgr) 100 (22889) 2015-07-13 13:58:46
#42 Peter (TomBombadil) 100 (3417) 2015-09-07 20:35:16
#43 Claude Vaillancourt (Cl3v3r) 100 (38351) 2015-09-13 15:08:15
#44 Alain Collignon (vexilla72) 100 (80284) 2016-01-12 12:25:56
#45 Szabó Zoltán (szabo.z87) 100 (55604) 2016-01-20 17:49:10
#46 j.h. (haegarq) 100 (15252) 2016-03-08 11:00:29
#47 Norbert Biermann (Norbert) 100 (44430) 2016-07-16 16:50:11
#48 Nicolas (nicosPavlov) 100 (151166) 2016-10-22 18:14:56
#49 zuben c3 (zuben-c3) 100 (24853) 2017-01-24 11:52:23
#50 Rene (ion) 100 (5617) 2017-02-07 20:49:01
#51 Dominik M. (Sgt. Pepper) 100 (89042) 2017-03-25 01:48:38
#52 chris (c2) 100 (51973) 2017-04-27 11:10:21
#53 Daniel Walder (ibex) 100 (14372) 2017-05-03 22:20:18
#54 Mir Dim (mir0soft) 100 (72404) 2017-05-09 12:32:28
#55 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-21 12:37:33
#56 Kim H. S. (tenchijin) 100 (25468) 2017-08-24 13:54:49
#57 Martin (martinbucher) 100 (27363) 2017-10-29 09:22:17
#58 Lane Williams (planetlane) 100 (21611) 2018-01-15 04:24:53
#59 Eric (ExAstris) 100 (26990) 2018-06-03 02:31:54
#60 Random Dude (rnd) 100 (77973) 2018-08-27 02:50:22
#61 sarah b (silva) 100 (14059) 2018-11-20 20:37:23
#62 Michael (FoM) 100 (34465) 2018-12-10 13:39:27
#63 Nofre Tete (noffi) 100 (21921) 2018-12-11 08:49:18
#64 Mort (mbrumm) 100 (700) 2019-03-10 23:10:20
#65 Mike (RogueRamblers) 100 (9347) 2019-03-11 21:26:16
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Playfair with hints about the grid

[theofanidis-03] - 87 users already solved this challenge, 4 are working on it.
 
 
 

In this challenge, only fragments of the grid used for a Playfair encryption are given. Are you able to reconstruct the matrix and decrypt the message?
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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: 2013-01-16 12:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#87) Achieved points (Global score) y-m-d - h:m:s

Hans Peter (hanspeter) 200 (52256) 2013-01-16 17:40:39
J. M. (jomandi) 200 (113270) 2013-01-16 17:50:41
Viktor (Veselovský) 200 (142053) 2013-01-16 18:13:58
Armin Krauss (argh) 200 (175390) 2013-01-16 19:00:47
#5 Kurt Gebauer (Yokozuna) 200 (146278) 2013-01-16 21:05:13
#6 E.T (Ertheb) 200 (71517) 2013-01-17 08:50:05
#7 Bart den Hartog (Bart13) 200 (118984) 2013-01-17 11:00:10
#8 Seth Kintigh (DarkFibre) 150 (79471) 2013-01-17 19:26:31
#9 Em Doulgerakis (Greko) 150 (124033) 2013-01-17 23:51:47
#10 Iain Sharp (WoodenHedgehog) 133 (2196) 2013-01-18 14:17:10
#11 kevin shaw (steggily) 133 (2298) 2013-01-18 14:17:26
#12 Michel Van Caneghem (vancan) 133 (49719) 2013-01-18 20:33:04
#13 David (aki321) 125 (27482) 2013-01-20 09:34:54
#14 Snake (snk) 108 (72164) 2013-01-28 15:55:22
#15 j.h. (haegarq) 107 (15252) 2013-01-29 18:37:44
#16 The Killer (Killer) 103 (42393) 2013-02-17 14:59:43
#17 Luigi Tomelli (archstanton) 102 (108345) 2013-03-17 14:44:00
#18 Kirill (ineaugh) 102 (1920) 2013-03-20 02:01:56
#19 Dusan (xxdradus) 101 (40236) 2013-03-23 16:30:31
#20 Ramon Rojas (superme) 101 (3409) 2013-04-06 21:58:10
#21 swarmspider (swarmspider) 101 (4528) 2013-04-25 09:38:37
#22 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-08-16 14:47:21
#23 George Lasry (george4096) 100 (292103) 2013-08-18 00:41:35
#24 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-27 16:30:42
#25 Michael Möller (michaelm) 100 (169404) 2013-10-02 17:18:31
#26 Steve (Samacian) 100 (23804) 2013-11-13 01:30:13
#27 Norbert Paefgen (egebamyasi) 100 (2728) 2013-12-01 16:10:15
#28 Jim Gillogly (Scryer) 100 (21260) 2013-12-02 08:28:45
#29 Alain (Integral) 100 (207924) 2013-12-15 18:28:49
#30 George Robinson (osric) 100 (1413) 2013-12-18 17:32:11
#31 cworstell (ace2) 100 (4870) 2013-12-20 15:25:34
#32 Bertold (bk) 100 (9673) 2014-01-06 21:48:26
#33 Marcel (bene1512) 100 (20896) 2014-02-02 01:14:20
#34 Sascha (The Hoddich) 100 (4350) 2014-03-06 14:59:30
#35 mark (FivePrime) 100 (3345) 2014-03-21 17:28:43
#36 Karl Schutt (günter) 100 (41550) 2014-05-04 09:26:32
#37 H. Lautenschlager (helmi) 100 (29022) 2014-07-23 12:37:20
#38 Robert (rm) 100 (56475) 2014-07-31 23:02:14
#39 Francisco Moraes (fmoraes) 100 (90044) 2014-10-30 19:59:14
#40 Andreas Frerichs (Ossili) 100 (33266) 2014-10-31 23:12:16
#41 jej (stationz) 100 (4939) 2014-11-09 18:22:36
#42 Lane Williams (planetlane) 100 (21611) 2014-12-05 14:23:43
#43 Pavel (haw) 100 (22728) 2014-12-07 22:53:29
#44 Julia Bernotat (El Greco ) 100 (81129) 2014-12-19 23:57:45
#45 Claude Vaillancourt (Cl3v3r) 100 (38351) 2014-12-27 14:38:22
#46 Tim Fink (Magellan) 100 (4876) 2014-12-28 03:12:02
#47 KW (qwer*) 100 (13963) 2015-01-12 20:01:15
#48 Danny Higgins (hamster147) 100 (22117) 2015-01-15 21:09:02
#49 HolgerK (HolgerK) 100 (25776) 2015-01-27 20:41:46
#50 S Combes (jerva) 100 (99132) 2015-02-28 21:22:30
#51 Bernhard Gruber (bgr) 100 (22889) 2015-05-12 16:01:30
#52 chris_3stones (3stones) 100 (37759) 2015-05-13 19:15:51
#53 partamier (yann) 100 (5435) 2015-05-15 10:51:27
#54 Lennart (Penthesilea) 100 (4110) 2015-06-05 00:40:36
#55 Michael Ammon (Ammonym) 100 (7719) 2015-06-20 20:11:20
#56 Thomas Lambert (lambert) 100 (35237) 2015-07-09 14:46:40
#57 Hans Joachim Girulat (joregi) 100 (33493) 2015-07-12 18:21:01
#58 J-L Morel (Rossignol) 100 (29125) 2015-07-28 13:14:13
#59 Tradecraft (Tradecraft) 100 (5540) 2015-08-04 14:14:21
#60 Rainer Zufall (kiekuk) 100 (56786) 2015-10-04 18:02:48
#61 S (Zyphe) 100 (10461) 2015-11-01 16:06:10
#62 Alain Collignon (vexilla72) 100 (80284) 2015-11-13 07:47:56
#63 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-14 17:11:20
#64 Marc (rcll0891) 100 (22180) 2016-01-12 21:27:08
#65 Peter (Garnet) 100 (14234) 2016-03-22 15:26:36
#66 Norbert Biermann (Norbert) 100 (44430) 2016-08-01 17:46:11
#67 Nicolas (nicosPavlov) 100 (151166) 2016-10-08 07:14:40
#68 zuben c3 (zuben-c3) 100 (24853) 2017-01-09 15:02:54
#69 Michael (FoM) 100 (34465) 2017-01-24 12:44:30
#70 Dominik M. (Sgt. Pepper) 100 (89042) 2017-04-01 15:35:25
#71 chris (c2) 100 (51973) 2017-04-24 15:41:06
#72 Mir Dim (mir0soft) 100 (72404) 2017-05-20 09:37:43
#73 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-22 10:32:38
#74 Hajoe (Tintin-Muc) 100 (6923) 2017-07-04 08:07:40
#75 Kim H. S. (tenchijin) 100 (25468) 2017-08-27 15:29:19
#76 Nofre Tete (noffi) 100 (21921) 2018-01-25 19:32:23
#77 Sebastian Slupina (Grandwizard) 100 (10866) 2018-02-21 11:33:24
#78 micaman (micaman) 100 (4634) 2018-05-11 17:22:25
#79 Eric (ExAstris) 100 (26990) 2018-05-22 02:41:50
#80 sarah b (silva) 100 (14059) 2018-08-18 16:24:11
#81 Random Dude (rnd) 100 (77973) 2018-09-23 17:37:35
#82 Ne0Lux-C1Ph3r (Ne0Lux-C1Ph3r) 100 (800) 2018-10-27 05:35:19
#83 steven (steven18) 100 (3091) 2018-11-25 17:06:08
#84 madness (madness) 100 (15307) 2019-02-11 08:11:10
#85 Mort (mbrumm) 100 (700) 2019-03-10 23:40:50
#86 Mike (RogueRamblers) 100 (9347) 2019-03-11 20:19:08
#87 Klaus (kumaus) 100 (21415) 2019-03-14 18:49:42
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   +++    [21:51 - 24.04.2019] r_karoly solved the Level I challenge 'Original Caesar Cipher'    +++    [14:24 - 24.04.2019] maryllb solved the Level I challenge 'Number Sequence'    +++    [14:20 - 24.04.2019] lim0n solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [14:17 - 24.04.2019] lim0n solved the Level I challenge 'Number Sequence — Part 8'    +++    [13:31 - 24.04.2019] Hopfrog solved the Level I challenge 'Number Sequence — Part 2'    +++