MysteryTwister C3
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Four levels

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

Limited attempts

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

Be fast

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

Special Level X

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



Cipher challenges on four levels

 

Level I crypto challenges

Level I Challenges - Pen & Paper

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

Level II Challenges - Programming skills required

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

Level III Challenges - Extensive computing power recommended

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

Level X Challenges - Unsolved ciphers

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

 

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


All Challenges (274)

Ordered by date posted, the most recent appear first.

The Last Note

[esslinger-18] - 74 users already solved this challenge, 18 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 (#74) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 200 (185115) 2014-09-23 00:22:00
Robert (rm) 200 (56475) 2014-09-23 00:23:10
Viktor (Veselovský) 200 (151602) 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 (118984) 2014-09-23 14:55:17
#7 Snake (snk) 200 (77889) 2014-09-23 16:49:27
#8 Andreas Frerichs (Ossili) 200 (33266) 2014-09-23 19:32:21
#9 Michael Möller (michaelm) 150 (173129) 2014-09-23 22:59:16
#10 Kurt Gebauer (Yokozuna) 150 (153663) 2014-09-24 01:28:43
#11 E.T (Ertheb) 150 (78180) 2014-09-24 13:02:37
#12 Ethlaron (Ethlaron) 133 (1253) 2014-09-25 09:41:20
#13 H. Lautenschlager (helmi) 125 (32747) 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 (106715) 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 (33593) 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 (87833) 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 (29125) 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 (34465) 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 (273573) 2017-06-19 12:32:16
#61 sarah b (silva) 100 (18511) 2017-07-21 17:15:14
#62 Danny Higgins (hamster147) 100 (31494) 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 (83811) 2018-07-17 02:21:00
#73 Julian (Lemmynator) 100 (16666) 2018-08-03 12:52:41
#74 Bertolo (Bertolo) 100 (7167) 2019-01-05 17:13:27
You must be logged in to solve the challenge


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 (153663) 2014-08-29 11:41:40
H. Lautenschlager (helmi) 1824 (32747) 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 (151602) 2014-09-03 21:15:45
#7 Bart den Hartog (Bart13) 1547 (118984) 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 (273573) 2017-07-10 19:39:10
#28 Niklas (nikeee) 1115 (1415) 2017-09-19 20:44:55
You must be logged in to solve the challenge


Heartbleed — Part 2

[wacker-12] - 58 users already solved this challenge, 10 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 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 14:34
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#58) Achieved points (Global score) y-m-d - h:m:s

Thomas Gonda (TomG) 200 (36291) 2014-08-28 23:11:12
H. Lautenschlager (helmi) 200 (32747) 2014-08-28 23:31:40
Kurt Gebauer (Yokozuna) 200 (153663) 2014-08-29 00:21:03
Robert (rm) 200 (56475) 2014-08-29 05:17:12
#5 masam (jimboo) 150 (18687) 2014-08-30 00:03:49
#6 Francisco Moraes (fmoraes) 150 (90044) 2014-08-30 04:13:23
#7 Thomas Lambert (lambert) 133 (35237) 2014-08-31 10:17:21
#8 Armin Krauss (argh) 120 (185115) 2014-09-01 20:09:35
#9 Viktor (Veselovský) 117 (151602) 2014-09-02 15:18:25
#10 Bart den Hartog (Bart13) 117 (118984) 2014-09-02 16:24:20
#11 Luigi Tomelli (archstanton) 114 (108345) 2014-09-03 23:18:59
#12 E.T (Ertheb) 113 (78180) 2014-09-04 20:06:16
#13 George (Theofanidis) 103 (106715) 2014-10-05 09:32:09
#14 Glaudson Ocampos (nashleon) 102 (1820) 2014-11-01 06:32:44
#15 Alain (Integral) 101 (207924) 2014-11-21 19:50:06
#16 Michael Jeffrey (empjay) 101 (3004) 2014-12-13 22:58:39
#17 Hank (hanky) 101 (22859) 2015-01-25 21:25:30
#18 WF (f077) 101 (6874) 2015-02-02 23:09:43
#19 Vlatiha Romanova (Vlatiha) 101 (10323) 2015-02-11 13:35:37
#20 mirth23 (mirth23) 101 (7050) 2015-02-19 07:13:31
#21 micaman (micaman) 101 (4634) 2015-02-19 15:33:34
#22 Zonkism (zonkism) 101 (4004) 2015-02-19 16:57:46
#23 Claude Vaillancourt (Cl3v3r) 100 (38351) 2015-03-17 17:47:46
#24 Karl Schutt (günter) 100 (41550) 2015-03-22 01:35:50
#25 Dustin (cryptocrat) 100 (310) 2015-04-01 20:14:30
#26 oxylius (oxylius) 100 (1404) 2015-04-14 12:48:04
#27 S (Dingo_the_BB) 100 (6534) 2015-04-14 12:56:42
#28 Rainer Zufall (kiekuk) 100 (56786) 2015-04-24 23:36:16
#29 Kim H. S. (tenchijin) 100 (25468) 2015-05-09 12:51:39
#30 Georgius Stolte (HazmatsFear) 100 (15671) 2015-05-28 20:43:58
#31 zahir mohsen moradi (ariobarzan) 100 (99757) 2015-05-29 07:48:52
#32 Forrest Gump (Polyphem) 100 (38763) 2015-07-12 19:54:25
#33 Em Doulgerakis (Greko) 100 (124033) 2015-09-01 16:38:05
#34 Joerg G. (SnifferMaster) 100 (18154) 2015-10-03 13:05:00
#35 Andreas Frerichs (Ossili) 100 (33266) 2015-12-15 21:49:35
#36 Jeremy Juenger (The_Shocker_12) 100 (3720) 2015-12-17 05:59:59
#37 Lane Williams (planetlane) 100 (23948) 2015-12-25 01:21:10
#38 MattW (officialmdub) 100 (1442) 2016-01-29 20:46:50
#39 Vilius (wi_lius) 100 (3497) 2016-02-16 12:35:53
#40 Dhruv (dhruvkalaria) 100 (1339) 2016-02-29 10:27:29
#41 HolgerK (HolgerK) 100 (25776) 2016-02-29 21:47:19
#42 Nicolas (nicosPavlov) 100 (151166) 2016-10-13 13:50:38
#43 Tom (dunklesToast) 100 (1526) 2016-10-25 15:25:42
#44 Javantea (Javantea) 100 (40816) 2016-12-02 05:44:06
#45 Robert Kosten (Robert Kosten) 100 (2724) 2017-01-08 18:00:17
#46 zuben c3 (zuben-c3) 100 (24853) 2017-01-12 17:29:21
#47 chris (c2) 100 (51973) 2017-03-03 13:26:53
#48 Hans Joachim Girulat (joregi) 100 (33593) 2017-03-09 20:34:05
#49 Mir Dim (mir0soft) 100 (72404) 2017-03-23 08:25:04
#50 Dominik M. (Sgt. Pepper) 100 (97919) 2017-03-26 23:07:57
#51 Kasia (kasia-tutej) 100 (53366) 2017-06-21 12:55:44
#52 D3d4lu5 (D3d4lu5) 100 (273573) 2017-06-21 15:14:05
#53 Niklas (nikeee) 100 (1415) 2017-09-05 21:04:30
#54 Random Dude (rnd) 100 (83811) 2018-07-16 01:37:39
#55 Steve Vaillancourt (stvai2) 100 (15041) 2018-07-27 19:52:34
#56 Julian (Lemmynator) 100 (16666) 2018-08-09 15:05:10
#57 Fernando karl (Karl) 100 (300) 2018-11-24 18:30:21
#58 Michael (FoM) 100 (34465) 2019-01-14 19:25:40
You must be logged in to solve the challenge


Heartbleed — Part 1

[wacker-11] - 86 users already solved this challenge, 18 are working on it.
 
 
 

This challenge is based on the Heartbleed Bug in OpenSSL discovered in April 2014. Attack a server provided by the Applied Information Security at the University of Kassel, which is specifically prepared to be vulnerable to the Heartbleed bug.
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 14:32
Maximum number of attempts for this challenge: 10

All successful users of this challenge

Rank User (#86) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 200 (153663) 2014-08-28 19:22:27
Thomas Gonda (TomG) 200 (36291) 2014-08-28 22:31:15
H. Lautenschlager (helmi) 200 (32747) 2014-08-28 23:03:13
Robert (rm) 200 (56475) 2014-08-29 02:38:29
#5 Thomas Lambert (lambert) 150 (35237) 2014-08-29 17:23:32
#6 Roland Jansen (roland) 150 (17607) 2014-08-29 18:21:57
#7 masam (jimboo) 150 (18687) 2014-08-29 23:35:33
#8 Francisco Moraes (fmoraes) 150 (90044) 2014-08-30 00:23:15
#9 Bart den Hartog (Bart13) 125 (118984) 2014-09-01 10:39:15
#10 Armin Krauss (argh) 125 (185115) 2014-09-01 10:40:13
#11 Viktor (Veselovský) 120 (151602) 2014-09-01 20:57:20
#12 E.T (Ertheb) 117 (78180) 2014-09-02 18:42:04
#13 Luigi Tomelli (archstanton) 114 (108345) 2014-09-03 16:40:08
#14 1474|\|9 (Latang) 111 (2142) 2014-09-05 22:12:23
#15 Lane Williams (planetlane) 108 (23948) 2014-09-08 23:55:52
#16 Peter Lustig (arsen) 107 (2838) 2014-09-10 23:42:21
#17 Mantas (kman) 106 (106) 2014-09-12 22:01:59
#18 Moacir (moacirbrg) 104 (104) 2014-09-20 21:00:54
#19 George (Theofanidis) 103 (106715) 2014-10-04 20:38:41
#20 Glaudson Ocampos (nashleon) 102 (1820) 2014-11-01 05:52:29
#21 Tim Fink (Magellan) 101 (4876) 2014-11-04 14:20:06
#22 Forrest Gump (Polyphem) 101 (38763) 2014-11-10 23:56:55
#23 Alain (Integral) 101 (207924) 2014-11-21 10:14:36
#24 Michael Jeffrey (empjay) 101 (3004) 2014-12-12 21:53:51
#25 Hank (hanky) 101 (22859) 2015-01-24 15:22:59
#26 WF (f077) 101 (6874) 2015-02-02 21:55:29
#27 Vlatiha Romanova (Vlatiha) 101 (10323) 2015-02-10 08:31:15
#28 Zonkism (zonkism) 101 (4004) 2015-02-18 00:25:14
#29 micaman (micaman) 101 (4634) 2015-02-18 00:35:44
#30 Steve (Samacian) 101 (23804) 2015-02-19 00:26:37
#31 mirth23 (mirth23) 101 (7050) 2015-02-19 04:06:10
#32 Johannes Leupold (TraderJoe) 101 (403) 2015-03-05 00:09:06
#33 chris (td-sec) 101 (202) 2015-03-12 22:47:03
#34 Claude Vaillancourt (Cl3v3r) 100 (38351) 2015-03-17 17:18:00
#35 Karl Schutt (günter) 100 (41550) 2015-03-21 11:58:27
#36 Dustin (cryptocrat) 100 (310) 2015-04-01 19:58:54
#37 oxylius (oxylius) 100 (1404) 2015-04-11 22:57:21
#38 S (Dingo_the_BB) 100 (6534) 2015-04-14 09:29:52
#39 Rainer Zufall (kiekuk) 100 (56786) 2015-04-15 13:19:54
#40 julian (julian5999) 100 (100) 2015-04-21 21:03:38
#41 Joel Dierkes (idiobi) 100 (400) 2015-05-09 11:39:16
#42 zahir mohsen moradi (ariobarzan) 100 (99757) 2015-05-28 13:28:10
#43 Georgius Stolte (HazmatsFear) 100 (15671) 2015-05-28 19:46:36
#44 D (devilchn) 100 (11142) 2015-06-12 11:43:13
#45 Em Doulgerakis (Greko) 100 (124033) 2015-08-27 07:06:43
#46 Joerg G. (SnifferMaster) 100 (18154) 2015-10-03 13:02:44
#47 Cedric Fischer (cefi1846) 100 (100) 2015-11-02 16:27:42
#48 S (Zyphe) 100 (10461) 2015-11-03 17:07:14
#49 Delcio da Silva Mello Júnior (Delcio) 100 (100) 2015-11-07 22:32:47
#50 S Combes (jerva) 100 (99132) 2015-11-22 18:51:07
#51 Jeremy Juenger (The_Shocker_12) 100 (3720) 2015-12-04 06:49:16
#52 Andreas Frerichs (Ossili) 100 (33266) 2015-12-15 20:22:07
#53 Patrick Williams (daddio) 100 (100) 2015-12-24 23:45:06
#54 MattW (officialmdub) 100 (1442) 2016-01-28 16:15:52
#55 Naman Bagga (namanb) 100 (2311) 2016-02-02 09:58:52
#56 Wojciech (WojciechM) 100 (501) 2016-02-04 10:37:21
#57 Vilius (wi_lius) 100 (3497) 2016-02-16 11:21:19
#58 Dhruv (dhruvkalaria) 100 (1339) 2016-02-29 07:30:40
#59 HolgerK (HolgerK) 100 (25776) 2016-02-29 21:46:52
#60 Daniel (Ribeiro) 100 (1398) 2016-08-22 05:47:50
#61 dnl (rbr) 100 (1398) 2016-08-23 19:06:10
#62 Luciano Ignaczak (CryptoClass) 100 (3505) 2016-08-26 22:04:57
#63 Nicolas (nicosPavlov) 100 (151166) 2016-10-11 14:31:32
#64 Alain Collignon (vexilla72) 100 (87833) 2016-10-22 10:23:46
#65 Tom (dunklesToast) 100 (1526) 2016-10-25 15:02:48
#66 Rodrigo Americo (rlamerico) 100 (100) 2016-11-04 00:58:41
#67 Javantea (Javantea) 100 (40816) 2016-12-02 05:55:17
#68 Robert Kosten (Robert Kosten) 100 (2724) 2017-01-02 18:31:12
#69 zuben c3 (zuben-c3) 100 (24853) 2017-01-12 14:26:37
#70 Michael (FoM) 100 (34465) 2017-02-15 10:27:39
#71 chris (c2) 100 (51973) 2017-03-03 11:58:21
#72 Hans Joachim Girulat (joregi) 100 (33593) 2017-03-08 20:08:16
#73 Mir Dim (mir0soft) 100 (72404) 2017-03-23 07:37:43
#74 Dominik M. (Sgt. Pepper) 100 (97919) 2017-03-26 22:01:25
#75 gundel (ckempf) 100 (100) 2017-04-03 19:58:05
#76 Daniel Walder (ibex) 100 (14372) 2017-05-11 23:57:43
#77 D3d4lu5 (D3d4lu5) 100 (273573) 2017-06-16 20:23:41
#78 Kasia (kasia-tutej) 100 (53366) 2017-06-21 12:23:22
#79 Niklas (nikeee) 100 (1415) 2017-09-05 21:02:37
#80 Michael (cavalleri89) 100 (200) 2017-09-12 04:27:30
#81 ayrtonbn (ayrton-01) 100 (200) 2017-09-15 05:13:58
#82 Leonardo Nichele de Aguiar (leonichele) 100 (200) 2017-09-16 03:45:59
#83 Danny Higgins (hamster147) 100 (31494) 2018-02-28 17:26:49
#84 Random Dude (rnd) 100 (83811) 2018-07-16 01:34:44
#85 Julian (Lemmynator) 100 (16666) 2018-08-09 14:58:35
#86 Fernando karl (Karl) 100 (300) 2018-11-24 18:31:08
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Double Column Transposition — Part 5

[lasry-10] - 6 users already solved this challenge, 2 are working on it.
 
 
 

In the last part of a series of mid-level Double Column Transposition challenges, you have to find the two keys. Each of it is 19 characters long and has been derived from an English phrase.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2014-06-23 15:56
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#6) Achieved points (Global score) y-m-d - h:m:s

Francisco Moraes (fmoraes) 1469 (90044) 2014-07-03 19:02:38
Peter Mustermann (Gummiboot) 1362 (60285) 2014-07-16 18:54:42
Alain (Integral) 1330 (207924) 2014-07-25 14:02:24
George (Theofanidis) 1211 (106715) 2014-11-05 13:45:03
#5 Marc (rcll0891) 1124 (24004) 2016-10-01 14:15:11
#6 D3d4lu5 (D3d4lu5) 1101 (273573) 2019-05-14 18:16:26
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   +++    [11:29 - 24.05.2019] dokyriak solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++    [11:16 - 24.05.2019] dokyriak solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [23:00 - 23.05.2019] Theofanidis solved the Level II challenge 'Handycipher made in love — Part 2'    +++    [19:57 - 23.05.2019] joregi solved the Level I challenge 'Autokey Cipher'    +++    [15:18 - 23.05.2019] Biork solved the Level I challenge 'A modified homophonic cipher with reduced alphabets — Part 1'    +++