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 (292)

Ordered by date posted, the most recent appear first.

M-138 — Part 3

[schmeh-11] - 47 users already solved this challenge, 3 are working on it.
 
 
 

This is part 3 in a series about the M-138. Part 3 is a ciphertext-only challenge (125 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: 2014-12-24 00:33
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#47) Achieved points (Global score) y-m-d - h:m:s

Bart den Hartog (Bart13) 2000 (144081) 2014-12-24 09:59:48
Kurt Gebauer (Yokozuna) 1725 (177433) 2014-12-26 03:32:17
Armin Krauss (argh) 1725 (188214) 2014-12-26 21:24:22
Michael Möller (michaelm) 1660 (175129) 2014-12-27 08:15:48
#5 Francisco Moraes (fmoraes) 1613 (90044) 2014-12-28 13:29:32
#6 George (Theofanidis) 1613 (112184) 2014-12-28 22:36:24
#7 Robert (rm) 1444 (56475) 2015-01-05 03:01:18
#8 E.T (Ertheb) 1406 (81809) 2015-01-09 16:57:01
#9 Alain (Integral) 1341 (207924) 2015-01-21 19:13:46
#10 Hans Joachim Girulat (joregi) 1286 (36278) 2015-02-11 09:29:25
#11 Claude Vaillancourt (Cl3v3r) 1283 (38351) 2015-02-13 03:09:20
#12 Nils (NiKo) 1273 (5055) 2015-02-19 16:31:30
#13 George Lasry (george4096) 1240 (302230) 2015-03-21 14:09:09
#14 Nils (NoelzzeN) 1217 (2546) 2015-04-25 13:12:41
#15 zahir mohsen moradi (ariobarzan) 1172 (99757) 2015-09-18 04:25:22
#16 Snake (snk) 1172 (83889) 2015-09-18 13:31:55
#17 Forrest Gump (Polyphem) 1159 (38763) 2015-12-07 18:00:24
#18 Szabó Zoltán (szabo.z87) 1153 (55604) 2016-02-02 21:18:14
#19 Julia Bernotat (El Greco ) 1150 (81129) 2016-02-27 01:33:49
#20 The Killer (Killer) 1150 (42393) 2016-02-29 01:41:53
#21 Martin (martinbucher) 1146 (27363) 2016-04-12 23:43:43
#22 Rainer Zufall (kiekuk) 1138 (56786) 2016-07-18 11:04:16
#23 Norbert Biermann (Norbert) 1137 (45031) 2016-07-31 15:53:39
#24 chris_3stones (3stones) 1133 (37759) 2016-10-10 20:35:59
#25 Alain Collignon (vexilla72) 1133 (90800) 2016-10-16 07:29:56
#26 J-L Morel (Rossignol) 1128 (29425) 2017-01-20 09:22:01
#27 Nicolas (nicosPavlov) 1127 (151166) 2017-02-07 02:37:23
#28 chris (c2) 1125 (51973) 2017-03-13 21:23:43
#29 Mir Dim (mir0soft) 1125 (72404) 2017-03-17 07:37:36
#30 Nils Rehwald (NoelzeN) 1125 (3465) 2017-03-22 12:32:32
#31 D3d4lu5 (D3d4lu5) 1119 (297709) 2017-08-12 05:24:12
#32 Lane Williams (planetlane) 1115 (23948) 2018-01-08 18:38:16
#33 Danny Higgins (hamster147) 1113 (34088) 2018-03-22 19:37:56
#34 Ignacio (Moebiusar) 1113 (7390) 2018-03-23 15:14:50
#35 Eric (ExAstris) 1111 (26990) 2018-06-19 01:35:01
#36 Random Dude (rnd) 1108 (90929) 2018-09-24 23:45:16
#37 João Vaz Martins (Awakening Star) 1107 (4561) 2018-11-01 06:20:16
#38 Luigi Tomelli (archstanton) 1106 (108345) 2018-12-21 18:37:03
#39 Bertolo (Bertolo) 1106 (7167) 2019-01-04 13:07:01
#40 zuben c3 (zuben-c3) 1106 (24853) 2019-01-06 12:06:10
#41 Kevin Weber (ThunderArmy) 1105 (7783) 2019-02-07 23:54:04
#42 Mike (RogueRamblers) 1104 (29805) 2019-05-14 02:23:33
#43 Stephan (Stephje1978) 1103 (26961) 2019-07-10 19:27:05
#44 Jeff (Fountain) 1103 (8788) 2019-07-14 00:49:50
#45 Eugene (lim0n) 1103 (54954) 2019-07-14 14:56:46
#46 gerdw (gerdw) 1102 (28315) 2019-07-27 12:45:38
#47 Erik (Erox) 1102 (26141) 2019-07-28 19:22:34
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M-138 — Part 2

[schmeh-10] - 102 users already solved this challenge.
 
 
 

This is part 2 in a series about the M-138. Part 2 is a partly-known plaintext challenge (48/100).
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: 2014-12-24 00:31
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#102) Achieved points (Global score) y-m-d - h:m:s

Bart den Hartog (Bart13) 2000 (144081) 2014-12-24 03:37:29
Kurt Gebauer (Yokozuna) 2000 (177433) 2014-12-24 08:23:24
Viktor (Veselovský) 2000 (155163) 2014-12-24 13:51:44
Snake (snk) 2000 (83889) 2014-12-24 21:51:26
#5 Michael Möller (michaelm) 2000 (175129) 2014-12-24 21:58:00
#6 Armin Krauss (argh) 1824 (188214) 2014-12-25 02:00:17
#7 Robert (rm) 1824 (56475) 2014-12-25 02:38:26
#8 George (Theofanidis) 1824 (112184) 2014-12-25 02:43:52
#9 H. Lautenschlager (helmi) 1824 (32947) 2014-12-25 16:36:05
#10 jgausem1 (jgausem1) 1824 (3299) 2014-12-25 19:42:27
#11 E.T (Ertheb) 1725 (81809) 2014-12-26 21:27:44
#12 Julia Bernotat (El Greco ) 1660 (81129) 2014-12-27 18:36:44
#13 Claude Vaillancourt (Cl3v3r) 1576 (38351) 2014-12-29 03:36:37
#14 Luigi Tomelli (archstanton) 1576 (108345) 2014-12-29 13:53:12
#15 Francisco Moraes (fmoraes) 1576 (90044) 2014-12-29 22:13:25
#16 Andreas Frerichs (Ossili) 1547 (33266) 2014-12-31 00:11:15
#17 Thomas Lambert (lambert) 1444 (35237) 2015-01-05 15:43:29
#18 Kim H. S. (tenchijin) 1444 (25468) 2015-01-05 21:45:39
#19 Hans Joachim Girulat (joregi) 1406 (36278) 2015-01-09 23:42:14
#20 Dusan (xxdradus) 1398 (40236) 2015-01-10 11:21:46
#21 j.h. (haegarq) 1385 (15252) 2015-01-12 16:10:48
#22 Roger Crews (rogerbrandon) 1357 (3588) 2015-01-17 15:46:10
#23 DirkS (Dustman) 1349 (8479) 2015-01-19 15:41:27
#24 WF (f077) 1349 (6874) 2015-01-19 22:13:25
#25 Alain (Integral) 1344 (207924) 2015-01-20 18:40:22
#26 Javantea (Javantea) 1341 (40816) 2015-01-21 20:38:23
#27 HolgerK (HolgerK) 1330 (25776) 2015-01-25 00:07:45
#28 Tom Tox (tox) 1284 (17708) 2015-02-12 20:20:27
#29 Hank (hanky) 1279 (22859) 2015-02-15 09:03:40
#30 Em Doulgerakis (Greko) 1279 (124033) 2015-02-15 20:06:38
#31 Elena (Lifeindeath) 1273 (2798) 2015-02-19 19:37:01
#32 Steve (Samacian) 1272 (23804) 2015-02-20 04:19:30
#33 TURINGBOMBE (TBREAKER) 1256 (10616) 2015-03-04 01:18:18
#34 piltil (piltil) 1249 (1351) 2015-03-11 09:48:53
#35 Ignacio (Moebiusar) 1248 (7390) 2015-03-12 23:34:25
#36 Karl Schutt (günter) 1245 (41550) 2015-03-15 11:56:50
#37 George Lasry (george4096) 1240 (302230) 2015-03-21 01:53:22
#38 S Combes (jerva) 1235 (99132) 2015-03-28 19:06:47
#39 Rainer Zufall (kiekuk) 1230 (56786) 2015-04-03 19:20:44
#40 Nils (NoelzzeN) 1228 (2546) 2015-04-06 10:35:54
#41 mirth23 (mirth23) 1222 (7050) 2015-04-15 20:56:30
#42 Hans Peter (hanspeter) 1214 (52256) 2015-05-01 10:30:58
#43 zahir mohsen moradi (ariobarzan) 1202 (99757) 2015-05-28 13:19:18
#44 Forrest Gump (Polyphem) 1198 (38763) 2015-06-07 22:20:11
#45 Michael Ammon (Ammonym) 1196 (7719) 2015-06-13 23:57:36
#46 Jens Hansen (bonnaix) 1191 (3511) 2015-06-30 13:25:02
#47 Tradecraft (Tradecraft) 1181 (5540) 2015-08-04 21:25:17
#48 Bernhard Gruber (bgr) 1172 (22889) 2015-09-17 18:12:59
#49 Manfred Wurm (Tschabobo) 1166 (8835) 2015-10-23 22:29:59
#50 Martin (martinbucher) 1166 (27363) 2015-10-25 02:31:49
#51 Alain Collignon (vexilla72) 1164 (90800) 2015-11-02 07:42:58
#52 KW (qwer*) 1155 (13963) 2016-01-11 21:00:50
#53 Nofre Tete (noffi) 1154 (21921) 2016-01-23 18:52:32
#54 Szabó Zoltán (szabo.z87) 1153 (55604) 2016-01-30 12:47:43
#55 The Killer (Killer) 1150 (42393) 2016-02-26 19:07:52
#56 Peter Horner (Peer) 1150 (4764) 2016-03-02 14:20:54
#57 Dominik M. (Sgt. Pepper) 1148 (97919) 2016-03-16 16:48:59
#58 pratikshya Mishra (Pratikshya) 1148 (1148) 2016-03-19 22:22:25
#59 Norbert Biermann (Norbert) 1137 (45031) 2016-07-31 15:51:16
#60 chris_3stones (3stones) 1133 (37759) 2016-10-10 20:34:41
#61 Nicolas (nicosPavlov) 1133 (151166) 2016-10-13 02:36:08
#62 zuben c3 (zuben-c3) 1131 (24853) 2016-11-22 17:31:59
#63 Marcel (bene1512) 1129 (20896) 2017-01-03 09:39:32
#64 J-L Morel (Rossignol) 1128 (29425) 2017-01-18 11:36:19
#65 Julian (Lemmynator) 1128 (17953) 2017-01-21 08:38:08
#66 Rene (ion) 1127 (5617) 2017-02-09 20:55:57
#67 chris (c2) 1125 (51973) 2017-03-13 17:44:51
#68 Mir Dim (mir0soft) 1125 (72404) 2017-03-15 20:58:48
#69 Nils Rehwald (NoelzeN) 1125 (3465) 2017-03-22 12:28:37
#70 Peter Grosse-Hering (Peter) 1123 (8097) 2017-04-28 09:48:30
#71 Danny Higgins (hamster147) 1123 (34088) 2017-05-17 17:39:22
#72 D3d4lu5 (D3d4lu5) 1122 (297709) 2017-06-17 00:39:36
#73 Hajoe (Tintin-Muc) 1121 (6923) 2017-07-10 19:43:57
#74 Igor (idipaolo) 1118 (10639) 2017-09-25 23:20:40
#75 Lane Williams (planetlane) 1115 (23948) 2018-01-07 22:54:05
#76 T (Wagner) 1115 (16988) 2018-01-14 14:39:03
#77 Sebastian Slupina (Grandwizard) 1114 (10866) 2018-02-14 20:56:21
#78 nimroth (nimroth cynthor) 1113 (6021) 2018-03-21 16:07:10
#79 Thomas Gonda (TomG) 1113 (36291) 2018-03-22 21:32:02
#80 Anna (ronja11) 1111 (4244) 2018-05-11 14:49:46
#81 Allisat (psychohasii) 1111 (4356) 2018-05-11 23:45:11
#82 Steve Vaillancourt (stvai2) 1111 (15041) 2018-05-19 19:22:38
#83 Eric (ExAstris) 1111 (26990) 2018-05-24 02:20:28
#84 Random Dude (rnd) 1109 (90929) 2018-08-19 22:52:21
#85 João Vaz Martins (Awakening Star) 1108 (4561) 2018-10-30 07:33:13
#86 madness (madness) 1107 (15407) 2018-11-15 23:12:00
#87 Bertolo (Bertolo) 1106 (7167) 2019-01-04 09:09:11
#88 Piotr (lesnik7) 1106 (8171) 2019-01-18 18:15:07
#89 Michael (FoM) 1106 (38953) 2019-01-30 01:17:29
#90 Kevin Weber (ThunderArmy) 1105 (7783) 2019-02-07 21:34:21
#91 Mike (RogueRamblers) 1105 (29805) 2019-03-20 18:42:56
#92 Benjamin (200611736) 1105 (10186) 2019-03-23 21:08:43
#93 Ralf Stephan (rwst) 1104 (25229) 2019-04-16 18:34:22
#94 Pavel Kessler (pavel) 1104 (5096) 2019-05-18 23:37:34
#95 Jeff (Fountain) 1103 (8788) 2019-06-02 05:46:41
#96 Stephan (Stephje1978) 1103 (26961) 2019-06-29 20:32:33
#97 Eugene (lim0n) 1103 (54954) 2019-07-09 14:14:15
#98 ajg (ludimus) 1103 (11914) 2019-07-16 11:18:58
#99 gerdw (gerdw) 1103 (28315) 2019-07-16 14:28:02
#100 Erik (Erox) 1102 (26141) 2019-07-28 16:33:50
#101 Dr. Peter Uelkes (RandyWaterhouse) 1102 (9990) 2019-07-30 10:42:14
#102 Piyush Agarwal (Piyushgrwl) 1102 (4795) 2019-08-30 12:14:03
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M-138 — Part 1

[schmeh-09] - 164 users already solved this challenge, 11 are working on it.
 
 
 

This is the beginner's challenge in a series about M-138, a manual cipher of the US army which has been relatively save at the beginning of world war 2nd. Part 1 of the series is a ciphertext-only challenge whose key is largely known.
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: 2014-12-24 00:28
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#164) Achieved points (Global score) y-m-d - h:m:s

Bart den Hartog (Bart13) 200 (144081) 2014-12-24 01:44:19
Kurt Gebauer (Yokozuna) 200 (177433) 2014-12-24 06:16:27
Viktor (Veselovský) 200 (155163) 2014-12-24 12:52:59
Snake (snk) 200 (83889) 2014-12-24 14:45:53
#5 Armin Krauss (argh) 200 (188214) 2014-12-24 16:21:56
#6 Robert (rm) 200 (56475) 2014-12-24 16:32:14
#7 Michael Möller (michaelm) 200 (175129) 2014-12-24 20:14:28
#8 H. Lautenschlager (helmi) 200 (32947) 2014-12-24 20:32:35
#9 George (Theofanidis) 200 (112184) 2014-12-24 20:37:00
#10 Andreas Frerichs (Ossili) 150 (33266) 2014-12-25 16:30:33
#11 jgausem1 (jgausem1) 150 (3299) 2014-12-25 17:52:48
#12 Francisco Moraes (fmoraes) 133 (90044) 2014-12-26 14:09:16
#13 E.T (Ertheb) 133 (81809) 2014-12-26 18:05:26
#14 Julia Bernotat (El Greco ) 125 (81129) 2014-12-27 01:40:42
#15 Claude Vaillancourt (Cl3v3r) 125 (38351) 2014-12-27 20:22:55
#16 Luigi Tomelli (archstanton) 120 (108345) 2014-12-28 10:39:59
#17 Tim Fink (Magellan) 120 (4876) 2014-12-28 14:49:28
#18 KW (qwer*) 120 (13963) 2014-12-28 21:12:38
#19 Thomas Lambert (lambert) 108 (35237) 2015-01-04 11:46:33
#20 j.h. (haegarq) 108 (15252) 2015-01-05 10:27:53
#21 Kim H. S. (tenchijin) 108 (25468) 2015-01-05 13:40:54
#22 Hans Joachim Girulat (joregi) 106 (36278) 2015-01-08 10:59:32
#23 Dusan (xxdradus) 106 (40236) 2015-01-09 10:31:09
#24 WF (f077) 105 (6874) 2015-01-11 11:28:17
#25 Glen (Snoth) 105 (105) 2015-01-12 19:30:39
#26 Sebastian Slupina (Grandwizard) 105 (10866) 2015-01-14 21:07:10
#27 Roger Crews (rogerbrandon) 104 (3588) 2015-01-17 12:48:58
#28 DirkS (Dustman) 104 (8479) 2015-01-19 15:39:03
#29 Alain (Integral) 104 (207924) 2015-01-20 17:01:17
#30 Javantea (Javantea) 103 (40816) 2015-01-21 19:05:19
#31 Joerg Schaeffler (DrAcula) 103 (2948) 2015-01-21 23:02:47
#32 HolgerK (HolgerK) 103 (25776) 2015-01-24 20:22:31
#33 Kerstin (herzchen412) 103 (3937) 2015-01-27 16:25:20
#34 Martin (LordMartin) 102 (402) 2015-02-04 03:47:25
#35 Vlatiha Romanova (Vlatiha) 102 (10323) 2015-02-09 21:54:12
#36 Tom Tox (tox) 102 (17708) 2015-02-12 12:09:02
#37 Em Doulgerakis (Greko) 102 (124033) 2015-02-12 15:29:29
#38 Hank (hanky) 102 (22859) 2015-02-13 06:49:41
#39 piltil (piltil) 102 (1351) 2015-02-13 23:53:06
#40 Georgius Stolte (HazmatsFear) 102 (15671) 2015-02-15 20:53:01
#41 Steve (Samacian) 102 (23804) 2015-02-17 03:35:41
#42 Michael Jeffrey (empjay) 102 (3004) 2015-02-17 20:03:53
#43 theresa (ttt) 102 (102) 2015-02-18 17:37:18
#44 Elena (Lifeindeath) 102 (2798) 2015-02-19 15:16:22
#45 TURINGBOMBE (TBREAKER) 102 (10616) 2015-02-22 16:14:52
#46 Wojciech Czernous (kristoff.njute) 102 (102) 2015-02-26 11:08:48
#47 coldwaterq (coldwaterq) 102 (1705) 2015-02-27 09:44:09
#48 Lutz Sittinger (Kryptolutz) 101 (1802) 2015-03-01 13:37:28
#49 Marta (argo916) 101 (501) 2015-03-01 14:05:26
#50 Kristina (horizonte) 101 (601) 2015-03-01 19:42:54
#51 K.S.Krishna Chandran (krishnan1996) 101 (101) 2015-03-04 15:07:07
#52 Johannes Leupold (TraderJoe) 101 (403) 2015-03-04 22:16:44
#53 chris (td-sec) 101 (202) 2015-03-06 12:12:18
#54 Ignacio (Moebiusar) 101 (7390) 2015-03-11 20:24:49
#55 Karl Schutt (günter) 101 (41550) 2015-03-14 14:35:19
#56 George Lasry (george4096) 101 (302230) 2015-03-21 01:09:17
#57 S Combes (jerva) 101 (99132) 2015-03-22 13:58:14
#58 Rainer Zufall (kiekuk) 101 (56786) 2015-03-28 20:25:19
#59 Guglielmo (Molinari) 101 (201) 2015-03-30 09:52:55
#60 Patrick Renz (tarantulla) 101 (2027) 2015-04-07 10:48:00
#61 Thomas Gonda (TomG) 101 (36291) 2015-04-09 21:09:54
#62 oxylius (oxylius) 101 (1404) 2015-04-11 22:22:11
#63 Stephan (stegi) 101 (801) 2015-04-14 23:32:19
#64 mirth23 (mirth23) 101 (7050) 2015-04-15 18:53:52
#65 S (Dingo_the_BB) 101 (6534) 2015-04-15 19:22:34
#66 Martin Schulz (Kristallseele) 101 (2122) 2015-04-16 12:37:14
#67 Zakk (zlefko) 101 (101) 2015-04-21 04:57:46
#68 Peter (Garnet) 101 (14234) 2015-04-21 16:32:00
#69 Lane Williams (planetlane) 101 (23948) 2015-04-25 13:56:36
#70 Nils (NoelzzeN) 101 (2546) 2015-04-25 15:58:49
#71 Hans Peter (hanspeter) 101 (52256) 2015-05-01 10:29:25
#72 Christian von Mach (cvm) 101 (726) 2015-05-05 12:23:46
#73 Andi (MTAndi) 101 (301) 2015-05-07 11:15:53
#74 partamier (yann) 101 (5635) 2015-05-14 10:42:21
#75 Forrest Gump (Polyphem) 101 (38763) 2015-05-19 22:36:45
#76 zahir mohsen moradi (ariobarzan) 101 (99757) 2015-05-27 21:09:03
#77 Niklas (Seuchenpilz) 101 (301) 2015-06-03 22:00:25
#78 Dave (compsec) 101 (3631) 2015-06-07 02:23:34
#79 Michael Ammon (Ammonym) 101 (7719) 2015-06-13 19:00:18
#80 Jens Hansen (bonnaix) 101 (3511) 2015-06-26 10:40:47
#81 Bernhard Gruber (bgr) 101 (22889) 2015-06-30 09:28:52
#82 Maria (julesjulchen) 100 (3019) 2015-07-21 14:28:18
#83 sn0c (sn0c) 100 (200) 2015-08-03 01:19:20
#84 Tradecraft (Tradecraft) 100 (5540) 2015-08-03 22:57:09
#85 Jan Hoffmann (dasmensch) 100 (400) 2015-09-01 22:19:36
#86 Roeland (roelieproelie) 100 (403) 2015-09-04 12:26:51
#87 Alain Collignon (vexilla72) 100 (90800) 2015-09-30 10:13:47
#88 Manfred Wurm (Tschabobo) 100 (8835) 2015-10-15 15:01:22
#89 Martin (martinbucher) 100 (27363) 2015-10-24 16:29:41
#90 S (Zyphe) 100 (10461) 2015-10-31 19:47:43
#91 Nofre Tete (noffi) 100 (21921) 2016-01-22 23:33:37
#92 Szabó Zoltán (szabo.z87) 100 (55604) 2016-01-29 10:11:37
#93 Peter Horner (Peer) 100 (4764) 2016-02-01 15:58:12
#94 Wojciech (WojciechM) 100 (501) 2016-02-03 11:07:03
#95 Ines (bufo01) 100 (4515) 2016-02-22 20:50:44
#96 Dominik M. (Sgt. Pepper) 100 (97919) 2016-03-15 14:22:00
#97 Fabian (XP-72) 100 (3707) 2016-03-18 14:44:45
#98 Gabriel Bigpenguin (BigPenguin) 100 (500) 2016-03-20 08:28:21
#99 Ulf Nilsson (unilsson) 100 (1100) 2016-04-12 19:43:33
#100 Gugu (Willyz) 100 (1810) 2016-04-19 16:41:29
#101 Norbert Biermann (Norbert) 100 (45031) 2016-07-20 23:32:55
#102 CESH (cesh) 100 (4995) 2016-08-18 22:52:11
#103 Nicolas (nicosPavlov) 100 (151166) 2016-10-04 13:27:37
#104 Hajoe (Tintin-Muc) 100 (6923) 2016-10-19 19:43:11
#105 Daniel Walder (ibex) 100 (14372) 2016-10-24 13:30:22
#106 Yass (Yass) 100 (300) 2016-11-02 23:45:00
#107 Simon Jakob (simon.jakob) 100 (18714) 2016-11-17 15:19:45
#108 zuben c3 (zuben-c3) 100 (24853) 2016-11-21 22:42:40
#109 JoGo (JoGo) 100 (11686) 2016-12-04 13:45:04
#110 Michael (FoM) 100 (38953) 2016-12-18 01:04:59
#111 Marcel (bene1512) 100 (20896) 2016-12-25 14:26:50
#112 Robert Kosten (Robert Kosten) 100 (2724) 2017-01-02 18:13:57
#113 Julian (Lemmynator) 100 (17953) 2017-01-14 23:07:28
#114 J-L Morel (Rossignol) 100 (29425) 2017-01-17 19:43:38
#115 Rene (ion) 100 (5617) 2017-02-08 22:26:51
#116 chris (c2) 100 (51973) 2017-02-28 18:17:46
#117 Mir Dim (mir0soft) 100 (72404) 2017-03-15 10:54:53
#118 Nils Rehwald (NoelzeN) 100 (3465) 2017-03-22 11:58:44
#119 sarah b (silva) 100 (26264) 2017-04-23 10:52:10
#120 Peter Grosse-Hering (Peter) 100 (8097) 2017-04-26 14:33:17
#121 Danny Higgins (hamster147) 100 (34088) 2017-05-16 00:28:59
#122 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-16 03:11:02
#123 Akonia (Akonia12) 100 (12153) 2017-07-20 22:24:31
#124 Igor (idipaolo) 100 (10639) 2017-09-25 22:21:08
#125 Holo (holo) 100 (200) 2017-10-17 01:52:54
#126 chris_3stones (3stones) 100 (37759) 2018-01-14 13:00:51
#127 T (Wagner) 100 (16988) 2018-01-14 14:38:17
#128 Holger (holger) 100 (812) 2018-02-09 17:10:10
#129 Mihail (plexor) 100 (16827) 2018-02-12 18:10:08
#130 nimroth (nimroth cynthor) 100 (6021) 2018-03-21 15:40:31
#131 Allisat (psychohasii) 100 (4356) 2018-04-26 19:41:54
#132 Diego (DiegoRA) 100 (3697) 2018-04-29 04:28:25
#133 Victor Cueva (Victoralin10) 100 (5282) 2018-04-29 19:01:18
#134 Jordy Reategui Rivera (eljordy) 100 (600) 2018-04-29 20:04:20
#135 Carlos (OzBlanco) 100 (3596) 2018-04-29 21:04:27
#136 Anna (ronja11) 100 (4244) 2018-05-07 20:10:30
#137 Steve Vaillancourt (stvai2) 100 (15041) 2018-05-16 00:30:52
#138 Eric (ExAstris) 100 (26990) 2018-05-23 04:41:22
#139 Benjamin (200611736) 100 (10186) 2018-06-09 20:02:42
#140 Christophe BORELLY (cb34) 100 (12358) 2018-06-09 21:47:56
#141 Random Dude (rnd) 100 (90929) 2018-07-03 21:44:32
#142 Laura (lauren) 100 (800) 2018-08-23 13:55:24
#143 João Vaz Martins (Awakening Star) 100 (4561) 2018-10-30 07:18:47
#144 madness (madness) 100 (15407) 2018-11-15 11:34:02
#145 Bertolo (Bertolo) 100 (7167) 2018-12-25 23:45:17
#146 fm92 (fm92) 100 (601) 2018-12-31 19:40:15
#147 Piotr (lesnik7) 100 (8171) 2019-01-12 17:46:23
#148 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-07 21:24:18
#149 León (skrilly4) 100 (2294) 2019-02-14 17:17:09
#150 LoneWolf219 (LoneWolf219) 100 (12795) 2019-03-08 14:10:45
#151 Mike (RogueRamblers) 100 (29805) 2019-03-20 17:37:05
#152 Ralf Stephan (rwst) 100 (25229) 2019-04-16 08:39:42
#153 Pavel Kessler (pavel) 100 (5096) 2019-05-05 00:55:40
#154 Jeff (Fountain) 100 (8788) 2019-06-01 15:44:06
#155 Stephan (Stephje1978) 100 (26961) 2019-06-27 22:08:44
#156 david (sexton) 100 (2801) 2019-07-05 15:59:27
#157 Eugene (lim0n) 100 (54954) 2019-07-08 16:18:53
#158 yult (yult) 100 (12185) 2019-07-14 09:52:29
#159 ajg (ludimus) 100 (11914) 2019-07-16 09:29:01
#160 gerdw (gerdw) 100 (28315) 2019-07-16 12:17:59
#161 Erik (Erox) 100 (26141) 2019-07-28 16:28:35
#162 Dr. Peter Uelkes (RandyWaterhouse) 100 (9990) 2019-07-30 07:43:39
#163 Piyush Agarwal (Piyushgrwl) 100 (4795) 2019-08-28 19:45:46
#164 h4rdl0ck (h4rdl0ck) 100 (4168) 2019-09-12 14:14:33
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The Last Note

[esslinger-18] - 75 users already solved this challenge, 19 are working on it.
 
 
 

You can find a short encrypted note at the end of the novel "Die achte Offenbarung" by Karl Olsberg. Decrypt the secret message!
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: 2014-09-22 22:13
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#75) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 200 (188214) 2014-09-23 00:22:00
Robert (rm) 200 (56475) 2014-09-23 00:23:10
Viktor (Veselovský) 200 (155163) 2014-09-23 00:25:56
Frank Promer (Frank) 200 (200) 2014-09-23 09:07:22
#5 Bernhard Gruber (bgr) 200 (22889) 2014-09-23 11:07:30
#6 Bart den Hartog (Bart13) 200 (144081) 2014-09-23 14:55:17
#7 Snake (snk) 200 (83889) 2014-09-23 16:49:27
#8 Andreas Frerichs (Ossili) 200 (33266) 2014-09-23 19:32:21
#9 Michael Möller (michaelm) 150 (175129) 2014-09-23 22:59:16
#10 Kurt Gebauer (Yokozuna) 150 (177433) 2014-09-24 01:28:43
#11 E.T (Ertheb) 150 (81809) 2014-09-24 13:02:37
#12 Ethlaron (Ethlaron) 133 (1253) 2014-09-25 09:41:20
#13 H. Lautenschlager (helmi) 125 (32947) 2014-09-26 13:21:39
#14 Julia Bernotat (El Greco ) 125 (81129) 2014-09-26 15:07:30
#15 KW (qwer*) 117 (13963) 2014-09-28 16:37:10
#16 Francisco Moraes (fmoraes) 113 (90044) 2014-09-30 19:49:03
#17 George (Theofanidis) 111 (112184) 2014-09-30 23:05:06
#18 Tim Fink (Magellan) 105 (4876) 2014-10-11 11:46:20
#19 Sebastian Slupina (Grandwizard) 105 (10866) 2014-10-12 23:52:36
#20 Bertold (bk) 104 (9673) 2014-10-16 22:20:13
#21 Tiloan (Tiloan) 101 (3840) 2014-12-01 20:21:02
#22 Alain (Integral) 101 (207924) 2014-12-04 22:47:33
#23 Max Mustermann (MustermM) 101 (6661) 2014-12-15 19:40:23
#24 Nik Maks (nik) 101 (1201) 2015-01-02 01:32:07
#25 Hans Joachim Girulat (joregi) 101 (36278) 2015-01-07 22:19:29
#26 Dusan (xxdradus) 101 (40236) 2015-01-09 09:26:20
#27 HolgerK (HolgerK) 101 (25776) 2015-01-11 03:17:20
#28 Georgius Stolte (HazmatsFear) 101 (15671) 2015-02-16 08:51:19
#29 Tom Tox (tox) 101 (17708) 2015-02-16 10:47:56
#30 Rainer Zufall (kiekuk) 101 (56786) 2015-03-04 17:35:26
#31 Johannes Leupold (TraderJoe) 101 (403) 2015-03-04 23:30:50
#32 Karl Schutt (günter) 101 (41550) 2015-03-15 02:28:23
#33 zahir mohsen moradi (ariobarzan) 100 (99757) 2015-06-03 16:27:46
#34 Michael Ammon (Ammonym) 100 (7719) 2015-06-23 22:07:43
#35 Martin Schubert (audra) 100 (400) 2015-06-30 22:31:56
#36 Maria (julesjulchen) 100 (3019) 2015-07-19 15:46:49
#37 Em Doulgerakis (Greko) 100 (124033) 2015-08-31 08:29:24
#38 Joerg G. (SnifferMaster) 100 (18154) 2015-10-09 08:54:00
#39 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-07 18:12:32
#40 Martin (martinbucher) 100 (27363) 2015-11-29 07:38:07
#41 Kim H. S. (tenchijin) 100 (25468) 2016-01-11 13:35:09
#42 Peter Horner (Peer) 100 (4764) 2016-01-21 15:52:11
#43 wolf (wstumpen) 100 (100) 2016-02-03 13:02:09
#44 Alain Collignon (vexilla72) 100 (90800) 2016-02-29 19:46:19
#45 Ines (bufo01) 100 (4515) 2016-03-06 13:19:43
#46 Peter (Garnet) 100 (14234) 2016-04-01 09:42:24
#47 J-L Morel (Rossignol) 100 (29425) 2016-07-19 15:53:36
#48 Norbert Biermann (Norbert) 100 (45031) 2016-07-19 21:40:43
#49 Fabian (XP-72) 100 (3707) 2016-07-21 00:30:08
#50 Hajoe (Tintin-Muc) 100 (6923) 2016-08-16 23:10:26
#51 Robert Kosten (Robert Kosten) 100 (2724) 2016-09-08 16:06:24
#52 Hans Peter (hanspeter) 100 (52256) 2016-09-17 12:19:45
#53 Dominik M. (Sgt. Pepper) 100 (97919) 2016-10-13 18:46:16
#54 zuben c3 (zuben-c3) 100 (24853) 2016-12-12 15:10:23
#55 Marcel (bene1512) 100 (20896) 2016-12-16 23:36:00
#56 S (Zyphe) 100 (10461) 2017-01-18 00:48:36
#57 Michael (FoM) 100 (38953) 2017-01-24 23:40:26
#58 chris (c2) 100 (51973) 2017-03-19 22:14:39
#59 Daniel Walder (ibex) 100 (14372) 2017-05-17 22:48:00
#60 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-19 12:32:16
#61 sarah b (silva) 100 (26264) 2017-07-21 17:15:14
#62 Danny Higgins (hamster147) 100 (34088) 2017-08-02 21:21:34
#63 Marc (rcll0891) 100 (24004) 2017-08-11 19:52:22
#64 Jörg Schwarzwälder (secuso) 100 (2125) 2018-02-05 13:16:25
#65 Lane Williams (planetlane) 100 (23948) 2018-02-06 03:45:56
#66 Mir Dim (mir0soft) 100 (72404) 2018-02-09 11:44:52
#67 nimroth (nimroth cynthor) 100 (6021) 2018-03-21 15:36:29
#68 Steve Vaillancourt (stvai2) 100 (15041) 2018-05-01 00:24:49
#69 Eric (ExAstris) 100 (26990) 2018-05-26 01:39:11
#70 Benjamin (200611736) 100 (10186) 2018-06-01 01:27:23
#71 j.h. (haegarq) 100 (15252) 2018-06-18 06:46:52
#72 Random Dude (rnd) 100 (90929) 2018-07-17 02:21:00
#73 Julian (Lemmynator) 100 (17953) 2018-08-03 12:52:41
#74 Bertolo (Bertolo) 100 (7167) 2019-01-05 17:13:27
#75 Mike (RogueRamblers) 100 (29805) 2019-06-22 01:53:10
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Heartbleed — Part 3

[wacker-13] - 28 users already solved this challenge, 4 are working on it.
 
 
 

This challenge is based on the Heartbleed Bug in OpenSSL discovered in April 2014. Attack a server which is specifically prepared to be vulnerable to the Heartbleed bug. Please note that it is necessary to solve Part 1 and 2 at first.
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: 2014-08-28 14:35
Maximum number of attempts for this challenge: 50

All successful users of this challenge

Rank User (#28) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (177433) 2014-08-29 11:41:40
H. Lautenschlager (helmi) 1824 (32947) 2014-08-29 17:50:45
masam (jimboo) 1725 (18687) 2014-08-30 18:20:26
Thomas Lambert (lambert) 1725 (35237) 2014-08-31 13:03:28
#5 Francisco Moraes (fmoraes) 1660 (90044) 2014-08-31 23:43:49
#6 Viktor (Veselovský) 1547 (155163) 2014-09-03 21:15:45
#7 Bart den Hartog (Bart13) 1547 (144081) 2014-09-04 00:54:10
#8 Luigi Tomelli (archstanton) 1523 (108345) 2014-09-04 22:21:26
#9 Alain (Integral) 1240 (207924) 2014-11-23 21:20:10
#10 Hank (hanky) 1200 (22859) 2015-02-05 03:10:07
#11 mirth23 (mirth23) 1195 (7050) 2015-02-19 08:25:16
#12 Zonkism (zonkism) 1195 (4004) 2015-02-20 00:57:26
#13 Joerg G. (SnifferMaster) 1151 (18154) 2015-10-21 05:23:08
#14 Em Doulgerakis (Greko) 1151 (124033) 2015-10-23 13:32:19
#15 Andreas Frerichs (Ossili) 1142 (33266) 2016-02-01 22:06:05
#16 Rainer Zufall (kiekuk) 1142 (56786) 2016-02-02 16:31:45
#17 MattW (officialmdub) 1142 (1442) 2016-02-06 04:29:44
#18 HolgerK (HolgerK) 1140 (25776) 2016-02-29 21:47:49
#19 Dhruv (dhruvkalaria) 1139 (1339) 2016-03-14 01:40:40
#20 Nicolas (nicosPavlov) 1127 (151166) 2016-10-13 14:04:42
#21 Tom (dunklesToast) 1126 (1526) 2016-10-25 15:42:13
#22 Robert Kosten (Robert Kosten) 1123 (2724) 2017-01-16 21:44:27
#23 chris (c2) 1121 (51973) 2017-03-10 08:29:17
#24 Mir Dim (mir0soft) 1120 (72404) 2017-03-26 09:18:47
#25 Dominik M. (Sgt. Pepper) 1120 (97919) 2017-03-30 17:43:45
#26 Kasia (kasia-tutej) 1117 (53366) 2017-06-21 13:11:30
#27 D3d4lu5 (D3d4lu5) 1117 (297709) 2017-07-10 19:39:10
#28 Niklas (nikeee) 1115 (1415) 2017-09-19 20:44:55
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   +++    [13:37 - 19.09.2019] h4rdl0ck solved the Level II challenge 'Factorization Cipher — Part 2'    +++    [07:08 - 19.09.2019] Bart13 solved the Level II challenge 'Hilly — Part 1'    +++    [23:59 - 18.09.2019] Byqq!T3qmxxZfRir solved the Level I challenge 'Number Sequence'    +++    [14:21 - 18.09.2019] h4rdl0ck solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [14:15 - 18.09.2019] lim0n solved the Level I challenge 'Image Noise'    +++