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.

Akelarre Part 1
[stamp-09] - 9 users already solved this challenge.
 
 
 
Akelarre is a combination of IDEA and RC5. However, Akelarre is not as strong as those two ciphers. Perform a known plaintext attack on Akelarre.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.
Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-11-24 14:40
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#9) Achieved points (Global score) y-m-d - h:m:s
Armin Krauss (argh) 1523 (175390) 2010-12-02 14:39:03
J. M. (jomandi) 1174 (113270) 2011-08-10 23:47:48
Jan Temme (JaT3) 1129 (11694) 2012-11-26 02:01:43
Viktor (Veselovský) 1126 (142053) 2013-01-18 19:16:55
#5 Bart den Hartog (Bart13) 1115 (118984) 2013-12-14 02:10:44
#6 Alain (Integral) 1106 (207924) 2014-12-03 10:26:49
#7 zahir mohsen moradi (ariobarzan) 1098 (99757) 2016-05-03 07:59:58
#8 D3d4lu5 (D3d4lu5) 1088 (260853) 2018-10-04 07:15:02
#9 George Lasry (george4096) 1088 (292103) 2019-01-08 21:50:16
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Enigma Combinatorics
[esslinger-07] - 89 users already solved this challenge, 62 are working on it.
 
 
 
The Enigma is an electro-mechanical rotor machine used for encryption and decryption. One main part of the Enigma is changeable rotors. This challenge deals with the calculation of the key space.
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: 2010-11-12 15:31
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#89) Achieved points (Global score) y-m-d - h:m:s
Roadrunner (rr) 200 (12702) 2010-11-12 22:18:52
Armin Krauss (argh) 200 (175390) 2010-11-13 00:16:31
Ulrich Armbrüster (uarmbruester) 133 (7987) 2010-11-15 13:46:30
Dennis Walter (Lotus) 120 (6827) 2010-11-16 23:36:36
#5 TURINGBOMBE (TBREAKER) 107 (10616) 2010-11-25 18:36:19
#6 Michail Pokryschkin (micpok) 105 (766) 2010-12-03 14:12:59
#7 Alan Dixon (NickBourbaki) 101 (7761) 2011-01-31 13:52:24
#8 David (aki321) 101 (27482) 2011-01-31 15:30:22
#9 Hans Rudolf (mutabor) 101 (3015) 2011-02-12 19:14:56
#10 Thomas Gonda (TomG) 101 (36291) 2011-02-23 17:47:04
#11 Christine Welsch (krawallchrischtl) 101 (809) 2011-02-25 23:42:27
#12 Wombat (Wombat) 101 (5822) 2011-04-25 16:23:04
#13 no such (agency) 101 (1916) 2011-05-13 10:13:51
#14 j.h. (haegarq) 100 (15252) 2011-06-03 07:19:08
#15 Daniel Fretwell (fretty) 100 (30107) 2011-06-29 13:59:15
#16 Seth Kintigh (DarkFibre) 100 (79471) 2011-06-30 01:15:36
#17 Stefan Haas (stef_the_chef) 100 (4329) 2011-07-08 18:28:38
#18 Horst Kevin (lordstege) 100 (1419) 2011-09-01 22:20:18
#19 J. M. (jomandi) 100 (113270) 2011-09-20 22:22:54
#20 Viktor (Veselovský) 100 (142053) 2011-10-03 15:00:23
#21 Dano (Dano) 100 (14610) 2011-10-03 19:40:44
#22 Bart den Hartog (Bart13) 100 (118984) 2011-11-04 01:51:30
#23 Flo Geht_dich gar_nichts_an (flo) 100 (6271) 2011-12-10 19:44:04
#24 Florian Rüchel (Javex) 100 (721) 2012-01-11 02:08:25
#25 Jay Kay (Merty) 100 (3726) 2012-01-19 14:52:18
#26 Tom Tox (tox) 100 (17708) 2012-02-01 15:05:17
#27 Michael Gürtler (michaelg) 100 (4128) 2012-02-23 16:22:04
#28 Hans Peter (hanspeter) 100 (52256) 2012-03-15 09:28:02
#29 Em Doulgerakis (Greko) 100 (124033) 2012-09-04 11:12:09
#30 chris_3stones (3stones) 100 (37759) 2012-09-11 07:50:19
#31 George (Theofanidis) 100 (101521) 2012-09-11 07:54:20
#32 Kurt Gebauer (Yokozuna) 100 (146278) 2012-09-25 00:00:20
#33 H. Lautenschlager (helmi) 100 (29022) 2012-10-01 00:03:40
#34 George Ho (GeorgH) 100 (3095) 2012-10-26 15:18:12
#35 gromone (gromone) 100 (501) 2012-11-10 20:13:09
#36 KW (qwer*) 100 (13963) 2012-11-25 21:24:00
#37 Colin Benner (Colin) 100 (1413) 2012-12-09 22:57:59
#38 Klaus (hoevi) 100 (2302) 2013-03-27 18:24:05
#39 RPH (derichard) 100 (27044) 2013-04-03 22:31:29
#40 Rubens (RR2535) 100 (500) 2013-04-22 16:34:11
#41 Los (Gurt) 100 (2742) 2013-04-27 14:27:49
#42 Luigi Tomelli (archstanton) 100 (108345) 2013-06-29 15:31:17
#43 Almut (problelmo) 100 (45992) 2013-07-15 18:32:39
#44 Steve (Samacian) 100 (23804) 2013-07-30 05:44:21
#45 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-08-15 23:12:52
#46 Sebastian Kluge (zappo) 100 (1801) 2013-09-11 12:51:00
#47 Alexander (cruachan) 100 (16051) 2013-09-12 23:28:16
#48 Felix (Flix) 100 (13712) 2013-09-26 00:36:25
#49 Hank (hanky) 100 (22859) 2013-10-03 15:05:23
#50 Forrest Gump (Polyphem) 100 (38763) 2013-10-08 13:10:31
#51 Boris (Kaasu) 100 (16566) 2013-11-12 13:31:25
#52 Norbert Paefgen (egebamyasi) 100 (2728) 2013-12-01 19:31:34
#53 Alain (Integral) 100 (207924) 2013-12-20 14:38:45
#54 Francisco Moraes (fmoraes) 100 (90044) 2014-01-14 21:24:27
#55 Marcel (bene1512) 100 (20896) 2014-02-13 23:46:48
#56 Pavel (haw) 100 (22728) 2014-02-17 20:48:14
#57 Karl Schutt (günter) 100 (41550) 2014-04-06 10:42:33
#58 julius gaius (julius) 100 (25581) 2014-08-03 19:02:52
#59 Julia Bernotat (El Greco ) 100 (81129) 2014-08-09 20:08:55
#60 Markus (Wasser) 100 (702) 2014-08-14 17:22:31
#61 Robert (rm) 100 (56475) 2014-09-25 14:13:27
#62 Andreas Frerichs (Ossili) 100 (33266) 2014-10-07 11:59:39
#63 mirth23 (mirth23) 100 (7050) 2015-02-23 12:20:31
#64 Rainer Zufall (kiekuk) 100 (56786) 2015-02-23 19:42:46
#65 Bernhard Gruber (bgr) 100 (22889) 2015-03-01 19:57:24
#66 Vlatiha Romanova (Vlatiha) 100 (10323) 2015-04-12 19:34:41
#67 Michael Ammon (Ammonym) 100 (7719) 2015-06-24 20:07:38
#68 Peter (TomBombadil) 100 (3417) 2015-09-09 16:07:13
#69 Claude Vaillancourt (Cl3v3r) 100 (38351) 2015-09-18 18:40:50
#70 Christian (chrisadmin) 100 (2019) 2015-12-26 18:54:27
#71 E.T (Ertheb) 100 (71517) 2016-03-06 14:07:02
#72 Dominik M. (Sgt. Pepper) 100 (89042) 2016-03-07 15:39:53
#73 Szabó Zoltán (szabo.z87) 100 (55604) 2016-03-24 07:34:12
#74 Peter (Garnet) 100 (14234) 2016-04-03 19:19:52
#75 Norbert Biermann (Norbert) 100 (44430) 2016-08-27 19:22:22
#76 Michael (FoM) 100 (34465) 2016-12-28 01:58:12
#77 Nofre Tete (noffi) 100 (21921) 2016-12-29 23:57:48
#78 chris (c2) 100 (51973) 2017-03-21 21:16:51
#79 Mir Dim (mir0soft) 100 (72404) 2017-04-25 13:49:21
#80 Daniel Walder (ibex) 100 (14372) 2017-05-05 23:07:09
#81 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-20 14:54:05
#82 Tim Fink (Magellan) 100 (4876) 2017-06-29 08:20:19
#83 Martin (martinbucher) 100 (27363) 2017-10-23 08:44:41
#84 Lane Williams (planetlane) 100 (21611) 2018-03-21 19:36:02
#85 Eric (ExAstris) 100 (26990) 2018-06-08 17:18:56
#86 Random Dude (rnd) 100 (77973) 2018-07-23 17:11:49
#87 Steve Vaillancourt (stvai2) 100 (15041) 2018-07-27 19:26:57
#88 sarah b (silva) 100 (14059) 2018-12-16 09:47:01
#89 Mike (RogueRamblers) 100 (9347) 2019-03-12 01:11:16
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One-Time Pad with Flaws
[esslinger-06] - 258 users already solved this challenge, 14 are working on it.
 
 
 
The "Three Investigators" heard that it was possible to create truly unbreakable cipher texts if you linked a stream of true random numbers to the plaintext (one-time pad). However this random stream must be incalculable for outsiders. Do you think you can, nevertheless, decrypt an eavesdropped encrypted message from the "Three Investigators"?
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.
Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-11-12 15:30
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#258) Achieved points (Global score) y-m-d - h:m:s
Ilya Ozerov (ilya) 200 (20556) 2010-11-12 22:20:45
Armin Krauss (argh) 200 (175390) 2010-11-12 23:20:47
Roadrunner (rr) 200 (12702) 2010-11-13 11:41:23
Hans Schuell (hschuell) 150 (2194) 2010-11-13 23:49:54
#5 Michael Möller (michaelm) 150 (169404) 2010-11-14 10:07:59
#6 Thomas Mattel (Tom) 133 (2462) 2010-11-14 17:28:22
#7 Benedikt Langer (belan) 133 (340) 2010-11-14 22:34:11
#8 mischa (mmisc) 125 (22426) 2010-11-15 18:06:22
#9 Nabb (Nabb) 117 (13670) 2010-11-18 05:24:01
#10 David (aki321) 114 (27482) 2010-11-18 23:04:19
#11 Ulrich Armbrüster (uarmbruester) 113 (7987) 2010-11-19 16:04:53
#12 Ronny Frey (nimbus) 109 (315) 2010-11-22 16:20:43
#13 Bernd Freise (Xanhem) 108 (1154) 2010-11-23 19:31:41
#14 Christian Inci (ch100) 104 (9253) 2010-12-05 09:44:36
#15 Thomas Gonda (TomG) 104 (36291) 2010-12-05 20:23:09
#16 Michail Pokryschkin (micpok) 104 (766) 2010-12-06 07:59:40
#17 Andreas Wolff (timberwolff) 103 (1340) 2010-12-16 14:36:04
#18 Vincent (Bwian) 102 (552) 2010-12-28 18:15:04
#19 Paula Olsen (paol) 102 (825) 2010-12-30 02:33:44
#20 Rene (HeavyHorst) 102 (409) 2011-01-02 20:46:09
#21 Wolfgang Weisser (wowmyst) 102 (33108) 2011-01-03 15:28:06
#22 ingo (ingo) 102 (712) 2011-01-04 21:22:39
#23 Lukas (Kahla) 102 (4719) 2011-01-07 00:08:56
#24 Hans Rudolf (mutabor) 101 (3015) 2011-01-24 23:29:32
#25 Gergely Simon (george314) 101 (16555) 2011-01-28 21:17:57
#26 Florian Rüchel (Javex) 101 (721) 2011-01-31 01:44:38
#27 Maximilian Engelhardt (theAngele) 101 (304) 2011-02-13 11:05:20
#28 Christine Welsch (krawallchrischtl) 101 (809) 2011-02-16 00:36:14
#29 Nobody (nobody) 101 (40618) 2011-02-17 21:13:52
#30 Fabian Bendun (benfa) 101 (8697) 2011-02-21 00:19:25
#31 Carsten Baum (crashti) 101 (1135) 2011-03-15 19:08:00
#32 Robert Kosten (Robert Kosten) 101 (2724) 2011-03-22 19:36:45
#33 Christof Kleber (Loki) 101 (6051) 2011-04-15 11:35:35
#34 Case (Case) 101 (505) 2011-04-17 12:01:28
#35 Sepp Maier (smai) 101 (1898) 2011-04-17 19:44:57
#36 Fabian Hemmer (llan) 101 (7842) 2011-04-18 19:51:08
#37 Andreas Schmitz (dexstar) 101 (1701) 2011-04-21 18:04:15
#38 Wombat (Wombat) 101 (5822) 2011-04-24 15:12:34
#39 Markus Krell (makrell) 101 (304) 2011-04-26 16:53:07
#40 Armin Lehmann (kuchen) 101 (101) 2011-04-27 22:55:23
#41 Egon Hamburger (Seehase) 101 (3445) 2011-05-08 14:01:48
#42 no such (agency) 101 (1916) 2011-05-12 15:15:13
#43 Daniel Fretwell (fretty) 100 (30107) 2011-06-21 11:16:24
#44 O.B. (Abaris) 100 (800) 2011-07-06 17:08:51
#45 Stefan Haas (stef_the_chef) 100 (4329) 2011-07-07 18:58:37
#46 Peter Mustermann (Gummiboot) 100 (60285) 2011-07-15 22:20:31
#47 Seth Kintigh (DarkFibre) 100 (79471) 2011-07-16 08:40:51
#48 Simon Jakob (simon.jakob) 100 (18714) 2011-07-23 16:17:30
#49 Robbt Neid (Das Tupel) 100 (9403) 2011-07-26 18:45:54
#50 Dano (Dano) 100 (14610) 2011-08-02 00:30:08
#51 dbuq (dbuq) 100 (22762) 2011-08-03 16:31:22
#52 Viktor (Veselovský) 100 (142053) 2011-08-08 03:10:34
#53 Nicolas Golubovic (qll) 100 (14919) 2011-08-16 02:49:55
#54 Horst Kevin (lordstege) 100 (1419) 2011-08-29 16:15:52
#55 Ph il (audioPhil) 100 (1935) 2011-09-02 03:09:37
#56 Dennis Walter (Lotus) 100 (6827) 2011-09-18 04:14:58
#57 J. M. (jomandi) 100 (113270) 2011-09-20 23:59:24
#58 Anton Wendel (MoD) 100 (5679) 2011-09-28 19:23:01
#59 marmotte (marmotte) 100 (1549) 2011-10-03 19:05:24
#60 j.h. (haegarq) 100 (15252) 2011-10-09 22:42:02
#61 The Killer (Killer) 100 (42393) 2011-10-20 21:50:29
#62 Bart den Hartog (Bart13) 100 (118984) 2011-11-01 22:51:35
#63 Martin L (Caesar) 100 (400) 2011-12-04 17:05:51
#64 Wade Burch (Braernoch) 100 (1308) 2011-12-11 02:18:12
#65 Nathan (Witten) 100 (25326) 2011-12-12 00:09:20
#66 John Willemse (Melting Brains) 100 (1316) 2011-12-14 12:07:38
#67 Flo Geht_dich gar_nichts_an (flo) 100 (6271) 2011-12-14 15:29:23
#68 Michael Gürtler (michaelg) 100 (4128) 2011-12-19 20:22:00
#69 Mayuresh Anand (effort2break) 100 (8728) 2012-01-01 21:10:05
#70 John (johnstosh) 100 (4448) 2012-01-18 04:33:29
#71 Matthias Schwarzkopf (MatzeAT) 100 (2967) 2012-01-28 10:08:00
#72 Lassu Eger (Hun) (slowmouse) 100 (1118) 2012-01-30 20:20:37
#73 George (Sw1mDC) 100 (601) 2012-02-10 17:58:32
#74 Hans Peter (hanspeter) 100 (52256) 2012-02-14 17:46:12
#75 aaa dummy (aaadummy) 100 (1903) 2012-02-17 17:37:21
#76 h3po (h3po) 100 (20433) 2012-02-19 13:33:32
#77 J Br (j.br) 100 (3242) 2012-02-20 16:27:10
#78 John (Tiger) 100 (1505) 2012-02-20 19:20:43
#79 Benjamin Walter (Xemrox) 100 (701) 2012-02-26 17:42:57
#80 Benne (post_ex0dus) 100 (601) 2012-03-03 00:31:03
#81 Kurt Gebauer (Yokozuna) 100 (146278) 2012-03-06 19:22:39
#82 Felix Mohr (winterwolf) 100 (2364) 2012-03-07 12:40:45
#83 Luigi Tomelli (archstanton) 100 (108345) 2012-03-10 11:00:00
#84 chris_3stones (3stones) 100 (37759) 2012-03-13 19:49:05
#85 George (Theofanidis) 100 (101521) 2012-03-13 19:50:07
#86 Clint G (balachthon) 100 (701) 2012-04-05 08:44:10
#87 Dusan (xxdradus) 100 (40236) 2012-04-05 10:36:29
#88 bubba gump (surrenderyourworld) 100 (925) 2012-04-09 01:57:10
#89 H. Lautenschlager (helmi) 100 (29022) 2012-04-11 16:04:52
#90 Christian von Mach (cvm) 100 (726) 2012-04-19 15:22:21
#91 Thomas Lambert (lambert) 100 (35237) 2012-04-20 12:52:56
#92 Uli Dulli (Uli Dulli) 100 (1408) 2012-05-06 16:47:17
#93 Ken (kmon123) 100 (200) 2012-05-27 06:07:18
#94 zuben c3 (zuben-c3) 100 (24853) 2012-06-11 10:48:06
#95 Daniel Richter (TheHiveMind) 100 (11147) 2012-06-12 21:27:08
#96 Steven Bi (chenhsi) 100 (1305) 2012-06-14 23:16:52
#97 Michel Van Caneghem (vancan) 100 (49719) 2012-06-16 23:28:57
#98 Ralf Stephan (rwst) 100 (25229) 2012-06-23 11:04:07
#99 mmm (mmm) 100 (200) 2012-07-14 09:29:23
#100 masam (jimboo) 100 (18687) 2012-07-14 14:04:04
#101 KW (qwer*) 100 (13963) 2012-07-15 19:35:52
#102 Em Doulgerakis (Greko) 100 (124033) 2012-07-21 11:32:56
#103 Stepan (m1sterx) 100 (19165) 2012-07-26 08:45:32
#104 Chakay (Chakay) 100 (900) 2012-07-29 20:37:43
#105 David (Neereus) 100 (1420) 2012-08-05 17:33:26
#106 RPH (derichard) 100 (27044) 2012-09-05 00:41:49
#107 Benny (Kingombo) 100 (3663) 2012-09-23 02:40:45
#108 Hannes (Hartmann) 100 (8680) 2012-09-23 20:48:18
#109 Martina (Nikita) 100 (3863) 2012-09-25 00:54:37
#110 Jan Knap (maddoxik) 100 (2458) 2012-09-30 22:14:41
#111 E.T (Ertheb) 100 (71517) 2012-10-01 22:21:02
#112 Paul Pantea (Soarele007) 100 (2695) 2012-10-28 23:49:31
#113 Lukas Juhrich (ljuhrich) 100 (5453) 2012-10-31 18:34:25
#114 Christian (md6) 100 (1404) 2012-11-04 19:22:20
#115 The Enigma (enigma) 100 (14336) 2012-11-07 23:10:23
#116 Andrew (Agromania) 100 (4508) 2012-11-15 18:57:55
#117 Urs Gysler (Sansibar) 100 (3269) 2012-12-02 09:52:02
#118 Alexander Pöllmann (alexanderla) 100 (601) 2012-12-24 13:47:27
#119 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-01-26 16:16:10
#120 Thomas Hahn (4OsoCg31XYcO) 100 (1703) 2013-01-28 18:03:36
#121 Hans Joachim Girulat (joregi) 100 (33493) 2013-03-21 21:31:25
#122 Velko Nikolov (staafl) 100 (13467) 2013-04-09 00:51:23
#123 Gianluca Andriolo (Andriolo) 100 (3900) 2013-04-12 09:22:33
#124 Snake (snk) 100 (72164) 2013-04-15 18:08:00
#125 Ramon Rojas (superme) 100 (3409) 2013-04-16 22:57:24
#126 coldwaterq (coldwaterq) 100 (1705) 2013-04-18 20:23:54
#127 Stefan (sdn) 100 (5137) 2013-04-29 10:08:56
#128 Gabriel (mathgl24) 100 (2427) 2013-05-10 14:31:59
#129 HE (hendeng) 100 (1600) 2013-05-17 12:09:00
#130 mk (bilbobeutlin) 100 (12340) 2013-05-17 13:04:10
#131 Petra (humppapenguin) 100 (3872) 2013-05-23 01:05:40
#132 n a (jarofyarr) 100 (1901) 2013-05-23 16:02:04
#133 Felix (Flix) 100 (13712) 2013-05-24 18:59:37
#134 H. X. R. (herp) 100 (602) 2013-06-03 01:31:39
#135 Steve (Samacian) 100 (23804) 2013-06-05 05:42:03
#136 CryptY (Grompf) 100 (2880) 2013-06-12 15:12:04
#137 Almut (problelmo) 100 (45992) 2013-06-26 01:09:14
#138 Friedemann (friede) 100 (3599) 2013-06-28 00:09:01
#139 Vlatiha Romanova (Vlatiha) 100 (10323) 2013-07-16 12:15:18
#140 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-07-18 22:41:36
#141 oldak (oldak) 100 (1300) 2013-08-09 13:13:52
#142 George Lasry (george4096) 100 (292103) 2013-09-04 00:19:11
#143 Sebastian Kluge (zappo) 100 (1801) 2013-09-10 22:10:16
#144 Alexander (cruachan) 100 (16051) 2013-09-13 19:10:23
#145 Bernhard Gruber (bgr) 100 (22889) 2013-10-10 15:48:52
#146 Boris (Kaasu) 100 (16566) 2013-10-17 23:13:10
#147 pablo (cooltrain) 100 (1500) 2013-11-28 13:00:49
#148 Jim Gillogly (Scryer) 100 (21260) 2013-12-02 18:58:14
#149 Francisco Moraes (fmoraes) 100 (90044) 2013-12-10 21:46:48
#150 Alain (Integral) 100 (207924) 2013-12-15 10:56:31
#151 Brad (braddrew) 100 (15878) 2013-12-15 11:11:45
#152 cworstell (ace2) 100 (4870) 2013-12-19 02:17:00
#153 Csaba Fitzl (csaby) 100 (6696) 2014-01-01 13:05:11
#154 Sebastian Liebl (Basti van Tasti) 100 (2548) 2014-01-05 20:31:03
#155 Joost (Joost) 100 (2653) 2014-01-10 00:48:22
#156 Pavel (haw) 100 (22728) 2014-01-12 10:24:54
#157 James Booth (jimbojetset35) 100 (2547) 2014-01-13 22:58:34
#158 Kim H. S. (tenchijin) 100 (25468) 2014-01-14 21:59:06
#159 Forrest Gump (Polyphem) 100 (38763) 2014-01-18 01:46:44
#160 Felix Eckardt (Felck) 100 (3464) 2014-01-18 20:43:34
#161 Marcel (bene1512) 100 (20896) 2014-02-02 14:17:46
#162 Nofre Tete (noffi) 100 (21921) 2014-02-12 18:57:24
#163 Ulf Nilsson (unilsson) 100 (1100) 2014-03-05 08:07:45
#164 mark (FivePrime) 100 (3345) 2014-03-10 17:34:19
#165 Karl Schutt (günter) 100 (41550) 2014-04-04 23:02:53
#166 Roland Schatz (flOvermind) 100 (3051) 2014-05-30 02:22:59
#167 Manfred Wurm (Tschabobo) 100 (8835) 2014-06-01 18:23:32
#168 Jian Wen (XxWappenxX) 100 (4048) 2014-06-23 12:40:56
#169 Julia Bernotat (El Greco ) 100 (81129) 2014-07-10 21:12:07
#170 julius gaius (julius) 100 (25581) 2014-07-19 21:45:40
#171 Hughes (hughes) 100 (4735) 2014-07-24 11:49:16
#172 Robert (rm) 100 (56475) 2014-07-31 22:11:08
#173 Isabella (Isa) 100 (4235) 2014-09-02 10:45:41
#174 Peter Lustig (arsen) 100 (2838) 2014-09-08 10:06:51
#175 Flo (sealth) 100 (13472) 2014-09-09 19:52:11
#176 Andreas Frerichs (Ossili) 100 (33266) 2014-09-11 16:27:51
#177 Javantea (Javantea) 100 (40816) 2014-11-10 10:33:38
#178 HolgerK (HolgerK) 100 (25776) 2014-11-22 14:06:38
#179 Michael Jeffrey (empjay) 100 (3004) 2014-12-04 02:17:23
#180 Claude Vaillancourt (Cl3v3r) 100 (38351) 2014-12-30 19:15:32
#181 Danny Higgins (hamster147) 100 (22117) 2015-01-04 23:38:17
#182 Kai Ludwig (TalentRaspel) 100 (15704) 2015-01-05 13:38:41
#183 Hank (hanky) 100 (22859) 2015-01-26 03:08:13
#184 Shoukat (e195633) 100 (10617) 2015-02-09 00:02:12
#185 Tim Fink (Magellan) 100 (4876) 2015-02-13 10:15:09
#186 mirth23 (mirth23) 100 (7050) 2015-02-17 19:32:47
#187 Rainer Zufall (kiekuk) 100 (56786) 2015-03-02 17:50:15
#188 Mark Milhet (xwordmark1) 100 (2322) 2015-03-16 15:50:17
#189 S Combes (jerva) 100 (99132) 2015-03-17 20:31:00
#190 Brian Kieslich (briank) 100 (6733) 2015-04-06 20:27:52
#191 S (Dingo_the_BB) 100 (6534) 2015-04-08 20:57:19
#192 Jogie (Jogie) 100 (2221) 2015-04-27 21:20:55
#193 Matthias Kotzerke (Esdeath) 100 (4004) 2015-05-13 00:28:43
#194 partamier (yann) 100 (5435) 2015-05-15 19:38:01
#195 Bentz (Wolfgang19) 100 (2583) 2015-05-25 18:49:01
#196 Michael Ammon (Ammonym) 100 (7719) 2015-05-25 20:58:43
#197 Georgius Stolte (HazmatsFear) 100 (15671) 2015-06-01 20:20:16
#198 Defekt75 (Defekt75) 100 (4325) 2015-06-24 13:20:21
#199 Mark van Heeswijk (markvh) 100 (2600) 2015-07-06 02:52:57
#200 Erik (Erox) 100 (22651) 2015-07-14 23:40:10
#201 Alain Collignon (vexilla72) 100 (80284) 2015-10-01 06:04:32
#202 J-L Morel (Rossignol) 100 (29125) 2015-10-04 14:37:26
#203 Joerg G. (SnifferMaster) 100 (18154) 2015-10-07 11:59:33
#204 S (Zyphe) 100 (10461) 2015-10-24 13:55:17
#205 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-06 07:45:34
#206 Rainer (Rainer74) 100 (8417) 2015-12-05 15:10:19
#207 Dominik M. (Sgt. Pepper) 100 (89042) 2015-12-16 11:09:36
#208 Lane Williams (planetlane) 100 (21611) 2015-12-27 04:48:00
#209 Wolfgang Kittenberger (kittekat) 100 (600) 2015-12-28 23:18:48
#210 Casaubon (cfreuden) 100 (8515) 2016-01-13 00:27:57
#211 D (devilchn) 100 (11142) 2016-02-09 20:14:58
#212 WF (f077) 100 (6874) 2016-02-16 19:28:27
#213 Peter (Garnet) 100 (14234) 2016-03-11 12:14:50
#214 Peter (TomBombadil) 100 (3417) 2016-04-02 17:01:59
#215 Joris Diesvelt (SylverFox) 100 (4019) 2016-06-30 23:47:04
#216 Norbert Biermann (Norbert) 100 (44430) 2016-07-07 19:54:44
#217 Benjamin Snavely (kaka) 100 (2708) 2016-08-07 15:58:39
#218 JoGo (JoGo) 100 (11686) 2016-08-31 11:08:21
#219 Nicolas (nicosPavlov) 100 (151166) 2016-09-29 12:57:14
#220 Daniel Walder (ibex) 100 (14372) 2016-10-20 15:06:17
#221 Julian (Lemmynator) 100 (16666) 2016-11-20 15:27:03
#222 Michael (FoM) 100 (34465) 2016-12-12 00:31:27
#223 Imam Uasa (Merricx) 100 (9188) 2016-12-13 09:17:19
#224 Meine Registrierung (TryC3) 100 (6045) 2016-12-25 14:45:14
#225 Tristan1473 (Tristan1473) 100 (18914) 2017-02-05 12:48:21
#226 Christoph (capiaghi) 100 (1804) 2017-03-02 22:14:43
#227 Mir Dim (mir0soft) 100 (72404) 2017-03-12 17:51:34
#228 Mau_Kappel (Mau_Kappel) 100 (4496) 2017-03-19 16:02:35
#229 chris (c2) 100 (51973) 2017-03-25 07:14:00
#230 Mihail (plexor) 100 (16827) 2017-05-28 21:45:12
#231 Lin Lu (Lin) 100 (300) 2017-06-01 08:55:42
#232 D3d4lu5 (D3d4lu5) 100 (260853) 2017-06-13 00:34:07
#233 sarah b (silva) 100 (14059) 2017-06-27 10:26:47
#234 Moomin (Mushmom) 100 (7674) 2017-07-15 22:14:17
#235 Akonia (Akonia12) 100 (12153) 2017-07-18 18:22:46
#236 Mr. Fox (Mr. Fox) 100 (3395) 2017-08-29 19:30:24
#237 nimroth (nimroth cynthor) 100 (6021) 2017-11-21 20:20:41
#238 Julian (Ju1703) 100 (4190) 2018-02-21 20:24:03
#239 Tom Tox (tox) 100 (17708) 2018-03-11 22:54:15
#240 Bertold (bk) 100 (9673) 2018-03-12 20:50:49
#241 Victor Cueva (Victoralin10) 100 (5282) 2018-04-30 06:26:16
#242 Steve Vaillancourt (stvai2) 100 (15041) 2018-04-30 20:48:13
#243 Eric (ExAstris) 100 (26990) 2018-05-16 15:48:40
#244 Benjamin (200611736) 100 (10086) 2018-05-31 03:30:15
#245 Fedilia (Fedilia) 100 (4489) 2018-06-09 17:39:13
#246 Random Dude (rnd) 100 (77973) 2018-06-21 16:59:34
#247 phoenix1204 (phoenix1204) 100 (1800) 2018-10-29 01:41:26
#248 Manfred Paul (manf) 100 (14774) 2018-11-13 23:28:14
#249 whitecowboy (whitecowboy) 100 (7446) 2019-02-05 18:12:40
#250 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-06 17:57:51
#251 simone (xseris) 100 (8432) 2019-02-15 20:14:50
#252 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-17 03:52:33
#253 madness (madness) 100 (15307) 2019-02-26 01:34:45
#254 Lia (Lia) 100 (6855) 2019-03-10 02:15:44
#255 Mike (RogueRamblers) 100 (9347) 2019-03-14 01:21:10
#256 Piyush Agarwal (Piyushgrwl) 100 (3493) 2019-03-26 18:29:42
#257 Klaus (kumaus) 100 (21415) 2019-04-02 17:54:28
#258 Christian (MarquisDeSud) 100 (4488) 2019-04-09 17:00:36
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Hybrid Encryption I
[kitrub-06] - 134 users already solved this challenge, 2 are working on it.
 
 
 
Hybrid encryption is widely used in practice. However, when using hybrid
encryption you should take care of certain details...
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.
Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-11-02 00:00
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#134) Achieved points (Global score) y-m-d - h:m:s
Nobody (nobody) 2000 (40618) 2010-11-02 22:36:17
Juan (kation) 1824 (6113) 2010-11-03 06:48:02
kyprizel (kyprizel) 1824 (20795) 2010-11-03 11:26:00
Thomas Schmucker (dg) 1824 (26066) 2010-11-03 19:20:13
#5 Claude Laveaux (claude.laveaux) 1824 (14504) 2010-11-03 21:24:56
#6 Roadrunner (rr) 1725 (12702) 2010-11-04 18:55:07
#7 Dennis Walter (Lotus) 1725 (6827) 2010-11-04 20:23:08
#8 Nabb (Nabb) 1660 (13670) 2010-11-05 14:50:54
#9 Armin Krauss (argh) 1502 (175390) 2010-11-10 08:39:31
#10 Cezary Glowacz (cezaryglowacz) 1485 (9995) 2010-11-11 15:53:45
#11 Ilya Ozerov (ilya) 1456 (20556) 2010-11-13 18:18:45
#12 Christian Inci (ch100) 1324 (9253) 2010-12-05 10:40:44
#13 Markus H. (maxxh) 1254 (3728) 2011-01-13 19:11:29
#14 Erik Rusek (Rusk) 1249 (3717) 2011-01-18 15:17:24
#15 Wolfgang Weisser (wowmyst) 1247 (33108) 2011-01-20 13:52:15
#16 mischa (mmisc) 1243 (22426) 2011-01-25 00:10:50
#17 Thomas Gonda (TomG) 1242 (36291) 2011-01-26 13:10:06
#18 David (aki321) 1235 (27482) 2011-02-04 15:55:34
#19 Timothy Lee (TLee) 1210 (1210) 2011-03-18 10:10:41
#20 v n (focus) 1205 (3510) 2011-03-29 01:21:14
#21 J. M. (jomandi) 1183 (113270) 2011-06-07 18:23:03
#22 Seth Kintigh (DarkFibre) 1172 (79471) 2011-07-30 18:27:32
#23 Viktor (Veselovský) 1170 (142053) 2011-08-09 13:10:24
#24 Daniel Fretwell (fretty) 1170 (30107) 2011-08-09 14:58:08
#25 Dano (Dano) 1169 (14610) 2011-08-11 15:53:37
#26 Peter Mustermann (Gummiboot) 1169 (60285) 2011-08-13 01:11:09
#27 dbuq (dbuq) 1168 (22762) 2011-08-21 15:31:34
#28 Nicolas Golubovic (qll) 1168 (14919) 2011-08-22 00:26:36
#29 h3po (h3po) 1167 (20433) 2011-08-24 17:50:06
#30 The Killer (Killer) 1166 (42393) 2011-08-31 01:37:00
#31 Thomas Lambert (lambert) 1158 (35237) 2011-10-30 11:38:30
#32 Christian Matt (Luy) 1157 (9889) 2011-11-01 21:59:37
#33 Bart den Hartog (Bart13) 1154 (118984) 2011-11-28 00:38:06
#34 Michel Van Caneghem (vancan) 1146 (49719) 2012-02-13 22:09:21
#35 Luigi Tomelli (archstanton) 1144 (108345) 2012-03-15 09:44:08
#36 Kurt Gebauer (Yokozuna) 1142 (146278) 2012-04-04 01:17:55
#37 Hans Peter (hanspeter) 1142 (52256) 2012-04-12 11:22:06
#38 Keith Randall (randall77) 1141 (31011) 2012-04-13 04:23:55
#39 Daniel Demmler (dd23) 1140 (8942) 2012-04-28 22:02:41
#40 Dusan (xxdradus) 1138 (40236) 2012-05-31 14:43:11
#41 Daniel Richter (TheHiveMind) 1137 (11147) 2012-06-19 00:53:50
#42 zuben c3 (zuben-c3) 1136 (24853) 2012-06-29 13:47:37
#43 George (Theofanidis) 1136 (101521) 2012-06-29 19:10:06
#44 Em Doulgerakis (Greko) 1134 (124033) 2012-07-26 09:15:29
#45 Christian (Etschupu) 1134 (31788) 2012-07-27 13:43:47
#46 chris_3stones (3stones) 1134 (37759) 2012-08-03 21:04:30
#47 RPH (derichard) 1131 (27044) 2012-09-16 16:56:49
#48 Rex (T-) 1129 (1129) 2012-10-30 07:12:10
#49 hardikkumar (hardik) 1129 (1129) 2012-10-30 07:12:51
#50 E.T (Ertheb) 1129 (71517) 2012-10-30 20:00:47
#51 Ashwin (t_o_x_i_c) 1129 (1129) 2012-11-10 00:38:27
#52 The Enigma (enigma) 1129 (14336) 2012-11-12 19:52:30
#53 zahir mohsen moradi (ariobarzan) 1125 (99757) 2013-02-07 00:16:01
#54 Dhwanil (Ddk1989) 1123 (1723) 2013-03-22 18:01:06
#55 Shailesh Padave (shaileshpadave) 1123 (2261) 2013-03-22 20:44:24
#56 Anubhuti Chaudhary (anubhuti_148) 1123 (1123) 2013-03-23 16:32:28
#57 mk (bilbobeutlin) 1122 (12340) 2013-04-09 21:50:35
#58 Velko Nikolov (staafl) 1122 (13467) 2013-04-20 01:46:46
#59 Almut (problelmo) 1119 (45992) 2013-07-03 23:03:59
#60 Philipp Hammer-Pohlau (phase2) 1118 (17981) 2013-07-23 19:25:32
#61 Ralf Stephan (rwst) 1118 (25229) 2013-07-30 12:16:04
#62 masam (jimboo) 1117 (18687) 2013-08-22 01:51:55
#63 Steve (Samacian) 1117 (23804) 2013-09-10 07:32:04
#64 Gergely Simon (george314) 1116 (16555) 2013-09-27 22:46:32
#65 Alexander (cruachan) 1116 (16051) 2013-10-06 01:52:59
#66 Hank (hanky) 1116 (22859) 2013-10-06 15:47:47
#67 Snake (snk) 1116 (72164) 2013-10-10 19:42:27
#68 Forrest Gump (Polyphem) 1116 (38763) 2013-10-12 20:46:20
#69 Boris (Kaasu) 1116 (16566) 2013-10-20 20:47:20
#70 kevin (krs425) 1115 (1115) 2013-11-04 04:04:24
#71 Brad (braddrew) 1114 (15878) 2013-12-20 13:02:47
#72 jonathan (munz) 1114 (8954) 2013-12-30 22:32:28
#73 Alain (Integral) 1113 (207924) 2014-01-07 11:04:19
#74 Pavel (haw) 1113 (22728) 2014-01-13 12:37:19
#75 Kim H. S. (tenchijin) 1112 (25468) 2014-03-12 08:35:42
#76 hellman (hellman) 1112 (14862) 2014-03-12 16:50:36
#77 caesar ([caesar]) 1111 (10738) 2014-03-24 16:16:15
#78 Karl Schutt (günter) 1111 (41550) 2014-04-05 21:18:54
#79 Igor (idipaolo) 1110 (10639) 2014-05-25 17:03:37
#80 Peter (51dc30ddc) 1108 (10916) 2014-07-27 23:08:55
#81 julius gaius (julius) 1108 (25581) 2014-07-31 00:27:27
#82 Christof B. (beans90) 1108 (9488) 2014-08-16 22:55:53
#83 Robert (rm) 1107 (56475) 2014-09-19 01:21:03
#84 Francisco Moraes (fmoraes) 1106 (90044) 2014-11-05 14:55:56
#85 Javantea (Javantea) 1106 (40816) 2014-11-14 23:08:07
#86 Julia Bernotat (El Greco ) 1106 (81129) 2014-11-26 22:42:34
#87 Kai Ludwig (TalentRaspel) 1105 (15704) 2015-01-17 22:36:43
#88 Claude Vaillancourt (Cl3v3r) 1105 (38351) 2015-01-27 17:58:58
#89 Konstantin Golovan (SoulShaker) 1104 (14091) 2015-03-08 19:37:45
#90 Dennis (skysurfer720) 1104 (1104) 2015-03-20 06:10:25
#91 Rainer Zufall (kiekuk) 1103 (56786) 2015-04-07 16:01:39
#92 Erik (Erox) 1101 (22651) 2015-08-03 12:45:13
#93 Sean (Kavanaugh) 1101 (29143) 2015-08-10 21:05:38
#94 S Combes (jerva) 1100 (99132) 2015-10-29 17:52:18
#95 Szabó Zoltán (szabo.z87) 1100 (55604) 2015-11-18 16:03:01
#96 Alain Collignon (vexilla72) 1100 (80284) 2015-11-23 14:03:48
#97 Dominik M. (Sgt. Pepper) 1099 (89042) 2016-01-21 18:10:47
#98 Marco Manfredi (mkk9901) 1098 (17686) 2016-03-15 14:41:33
#99 Guruswamy Nellaivadivelu (guruvadivelu) 1098 (1098) 2016-03-16 20:56:35
#100 Praveen (praveen.subramaniyam) 1098 (1098) 2016-03-16 21:00:36
#101 Norbert Biermann (Norbert) 1096 (44430) 2016-08-01 15:19:05
#102 Flo (sealth) 1096 (13472) 2016-08-22 14:48:30
#103 Nicolas (nicosPavlov) 1096 (151166) 2016-10-02 09:25:20
#104 neko (neko) 1095 (7679) 2016-11-19 13:44:47
#105 ender (endered) 1095 (5478) 2016-11-19 14:44:12
#106 Simon Jakob (simon.jakob) 1095 (18714) 2016-11-21 11:23:44
#107 Marcel (bene1512) 1094 (20896) 2017-01-03 17:07:06
#108 digiter (digiter1) 1094 (2187) 2017-02-22 06:03:39
#109 Tristan1473 (Tristan1473) 1094 (18914) 2017-02-22 10:00:30
#110 Hans Joachim Girulat (joregi) 1094 (33493) 2017-03-02 18:15:09
#111 Venkatesh Ramanujam Rangarajan (venki1092) 1094 (1094) 2017-03-14 20:47:58
#112 chris (c2) 1094 (51973) 2017-03-17 16:21:57
#113 Mir Dim (mir0soft) 1094 (72404) 2017-03-18 07:45:42
#114 Kasia (kasia-tutej) 1093 (53366) 2017-05-30 14:25:39
#115 john doe (misio) 1093 (7371) 2017-05-30 18:25:03
#116 Mihail (plexor) 1093 (16827) 2017-06-08 22:26:14
#117 D3d4lu5 (D3d4lu5) 1093 (260853) 2017-06-16 02:23:24
#118 George Lasry (george4096) 1092 (292103) 2017-07-29 23:16:34
#119 Akonia (Akonia12) 1092 (12153) 2017-07-31 17:19:37
#120 Akhil (simply.akhil777@gmail.com) 1091 (1091) 2017-10-10 05:01:08
#121 Steve Vaillancourt (stvai2) 1089 (15041) 2018-05-13 15:59:32
#122 Eric (ExAstris) 1089 (26990) 2018-05-25 03:13:32
#123 Georgius Stolte (HazmatsFear) 1089 (15671) 2018-06-08 18:13:40
#124 Christophe BORELLY (cb34) 1089 (12358) 2018-06-15 09:18:25
#125 E41514006 (E41514006) 1089 (4957) 2018-07-10 13:57:39
#126 Julian (Lemmynator) 1089 (16666) 2018-08-02 14:51:42
#127 Random Dude (rnd) 1089 (77973) 2018-08-19 14:21:21
#128 Muthaiah Ramanathan (muthuram93) 1088 (1088) 2018-10-11 05:34:23
#129 Manfred Paul (manf) 1088 (14774) 2018-11-14 17:31:08
#130 Michael (FoM) 1087 (34465) 2019-01-29 02:46:37
#131 eschar (eschar) 1087 (3264) 2019-01-31 14:29:54
#132 LoneWolf219 (LoneWolf219) 1087 (12795) 2019-03-10 19:45:49
#133 Will (nitrow) 1087 (5643) 2019-03-21 17:22:29
#134 Klaus (kumaus) 1087 (21415) 2019-04-04 15:02:21
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Purple 1
[stamp-08] - 15 users already solved this challenge, 1 is working on it.
 
 
 
The Purple machine was the Japanese counterpart of the German Enigma machine.
Decrypt the given ciphertext which was encrypted with the Purple machine.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.
Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-10-27 00:00
Maximum number of attempts for this challenge: 25

All successful users of this challenge

Rank User (#15) Achieved points (Global score) y-m-d - h:m:s
Peter Mustermann (Gummiboot) 1167 (60285) 2011-08-19 19:18:21
J. M. (jomandi) 1155 (113270) 2011-11-14 07:57:14
Seth Kintigh (DarkFibre) 1144 (79471) 2012-03-10 01:24:35
Luigi Tomelli (archstanton) 1118 (108345) 2013-07-20 17:56:20
#5 Kurt Gebauer (Yokozuna) 1115 (146278) 2013-11-02 12:51:51
#6 Alain (Integral) 1111 (207924) 2014-03-15 12:32:05
#7 George Lasry (george4096) 1110 (292103) 2014-05-02 02:40:29
#8 Bart den Hartog (Bart13) 1110 (118984) 2014-05-20 01:08:40
#9 Francisco Moraes (fmoraes) 1106 (90044) 2014-12-04 23:41:38
#10 George (Theofanidis) 1105 (101521) 2014-12-27 09:52:13
#11 zahir mohsen moradi (ariobarzan) 1100 (99757) 2015-10-07 04:31:43
#12 Nicolas (nicosPavlov) 1095 (151166) 2016-12-02 06:42:17
#13 chris (c2) 1093 (51973) 2017-03-31 18:08:54
#14 D3d4lu5 (D3d4lu5) 1092 (260853) 2017-09-03 12:15:11
#15 Mike (RogueRamblers) 1087 (9347) 2019-03-11 19:42:49
You must be logged in to solve the challenge
 
 
powered by the CrypTool project  CrypTool

 

   +++    [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'    +++