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.

Factorization Cipher — Part 1

[veselovsky-04] - 421 users already solved this challenge, 10 are working on it.
 
 
 

With the help of 7 pairs of plaintext-ciphertext you have to find out how this factorization cipher works and then decrypt a ciphertext.
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-17 18:42
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#421) Achieved points (Global score) y-m-d - h:m:s

David (aki321) 200 (27482) 2011-10-17 19:11:41
Seth Kintigh (DarkFibre) 200 (79471) 2011-10-17 20:42:20
Michael Möller (michaelm) 200 (175129) 2011-10-17 20:55:05
Daniel Fretwell (fretty) 200 (30107) 2011-10-18 00:25:48
#5 J. M. (jomandi) 200 (113270) 2011-10-18 01:56:32
#6 dbuq (dbuq) 200 (22762) 2011-10-18 03:28:41
#7 Thomas Gonda (TomG) 200 (36291) 2011-10-18 11:45:02
#8 Christof Kleber (Loki) 200 (6051) 2011-10-18 11:56:35
#9 Armin Krauss (argh) 150 (188214) 2011-10-18 19:35:57
#10 The Killer (Killer) 150 (42393) 2011-10-18 23:35:24
#11 Peter Mustermann (Gummiboot) 150 (60285) 2011-10-19 10:50:10
#12 Claudius Homolka (uddaberget) 133 (133) 2011-10-20 11:55:59
#13 Christian Matt (Luy) 120 (9889) 2011-10-22 02:16:36
#14 Annie (Annanasss) 120 (6813) 2011-10-22 11:52:44
#15 Wladimir Paulsen (wladimir) 120 (331) 2011-10-22 12:35:31
#16 Benjamin Aicheler (hg14004) 113 (347) 2011-10-25 16:39:36
#17 Michal Musilek (mim3) 106 (1121) 2011-11-03 23:01:26
#18 Bart den Hartog (Bart13) 105 (144081) 2011-11-04 23:17:21
#19 j.h. (haegarq) 104 (15252) 2011-11-11 22:42:52
#20 Sebastian Fischer (fischers) 103 (308) 2011-11-22 23:06:07
#21 Manfred Paul (anybody) 102 (606) 2011-11-26 20:24:21
#22 Keith Randall (randall77) 102 (31011) 2011-11-30 22:47:31
#23 Arkhaum (arkhaum) 102 (203) 2011-12-01 23:06:11
#24 Ants-Oskar Mäesalu (aomaesalu) 102 (403) 2011-12-03 11:59:20
#25 Andy Gotterba (delzer) 102 (303) 2011-12-04 08:42:34
#26 Julian Müller (Oscar) 102 (406) 2011-12-06 18:49:26
#27 Nathan (Witten) 102 (25326) 2011-12-06 19:53:42
#28 Jan Kuhfeld (JaKu) 102 (1903) 2011-12-06 22:30:08
#29 Wade Burch (Braernoch) 102 (1308) 2011-12-07 00:08:09
#30 Mathew Brown (browni3141) 102 (807) 2011-12-08 01:43:26
#31 Darren (barr306) 102 (1056) 2011-12-09 21:35:51
#32 T.HAIN (HAIN) 102 (903) 2011-12-10 15:43:11
#33 Flo Geht_dich gar_nichts_an (flo) 102 (6271) 2011-12-10 21:38:00
#34 John Willemse (Melting Brains) 102 (1316) 2011-12-13 13:03:28
#35 mischa (mmisc) 102 (22426) 2011-12-16 17:13:27
#36 rob m (ic0ns) 102 (102) 2011-12-19 20:00:01
#37 Pavel Kessler (pavel) 101 (5096) 2011-12-26 22:57:14
#38 jacobian1729 (jacobian1729) 101 (5584) 2011-12-27 06:07:58
#39 Mayuresh Anand (effort2break) 101 (8728) 2011-12-27 10:55:43
#40 Luigi Tomelli (archstanton) 101 (108345) 2012-01-01 14:38:31
#41 Matthias Schwarzkopf (MatzeAT) 101 (2967) 2012-01-02 13:34:57
#42 Wombat (Wombat) 101 (5822) 2012-01-05 07:35:21
#43 Robbt Neid (Das Tupel) 101 (9403) 2012-01-15 11:46:01
#44 Mark Simkin (msimkin) 101 (1570) 2012-01-19 05:59:25
#45 h3po (h3po) 101 (20433) 2012-01-31 00:58:57
#46 Martin Härterich (HaeM) 101 (15149) 2012-02-01 16:01:43
#47 Tom Tox (tox) 101 (17708) 2012-02-06 07:32:44
#48 Michel Van Caneghem (vancan) 101 (49719) 2012-02-11 23:03:53
#49 Saurabh (saurabheights) 101 (610) 2012-02-14 08:47:57
#50 E.T (Ertheb) 101 (81809) 2012-02-15 19:14:06
#51 Hans Peter (hanspeter) 101 (52256) 2012-02-16 23:45:22
#52 Ralf Stephan (rwst) 101 (25229) 2012-02-17 16:43:01
#53 aaa dummy (aaadummy) 101 (1903) 2012-02-18 10:26:39
#54 John (Tiger) 101 (1505) 2012-02-21 19:17:59
#55 Niklas Giehl (niklas) 101 (201) 2012-02-23 17:13:02
#56 Michael Gürtler (michaelg) 101 (4128) 2012-02-24 19:55:32
#57 J Br (j.br) 101 (3242) 2012-02-27 16:08:30
#58 Lukas (Kahla) 101 (4719) 2012-02-28 01:06:15
#59 Michal Ambroz (xambroz) 101 (2810) 2012-03-04 00:31:14
#60 Kurt Gebauer (Yokozuna) 101 (177433) 2012-03-05 23:08:05
#61 Julius Sewing (H3BX) 101 (332) 2012-03-06 21:23:44
#62 Felix Mohr (winterwolf) 101 (2364) 2012-03-08 20:19:45
#63 Thomas Lambert (lambert) 101 (35237) 2012-03-11 17:10:56
#64 bubba gump (surrenderyourworld) 101 (925) 2012-03-18 12:29:32
#65 Artem (ArthaZz) 101 (1280) 2012-03-25 22:41:34
#66 Dusan (xxdradus) 101 (40236) 2012-04-01 13:12:45
#67 Clint G (balachthon) 101 (701) 2012-04-05 07:30:41
#68 Michael (OMGTallMonster) 101 (301) 2012-04-06 01:01:58
#69 Steluta P. (maty_star) 101 (5734) 2012-04-06 01:02:55
#70 Jais (oliver43) 101 (1743) 2012-04-07 13:17:08
#71 Shawn Kimble (seriouslytaken) 101 (501) 2012-04-10 04:51:16
#72 H. Lautenschlager (helmi) 101 (32947) 2012-04-12 23:35:34
#73 Roxana Ioana (rock_sana) 101 (610) 2012-04-13 16:59:28
#74 Pete Teleha (RedFive) 101 (301) 2012-04-17 18:53:10
#75 Michael (mtt5074) 101 (602) 2012-04-21 19:56:19
#76 George (Theofanidis) 101 (112184) 2012-04-22 18:36:49
#77 Lars (LarsH) 101 (201) 2012-04-24 02:08:15
#78 Benjamin Skrehot (BennySkr) 101 (409) 2012-04-26 22:38:11
#79 Daniel Demmler (dd23) 101 (8942) 2012-04-28 16:34:30
#80 Ulrich Dorobeck (Papageno) 101 (3827) 2012-04-29 20:42:17
#81 Moi (MSTinaFlow) 101 (2979) 2012-05-01 22:18:40
#82 Fabian Bendun (benfa) 101 (8697) 2012-05-04 18:01:50
#83 Вадим (Lambdaman) 100 (325) 2012-05-05 06:08:40
#84 Christof B. (beans90) 100 (9488) 2012-05-06 14:36:34
#85 Uli Dulli (Uli Dulli) 100 (1408) 2012-05-06 23:29:36
#86 P (PP65477) 100 (700) 2012-06-10 19:47:03
#87 KW (qwer*) 100 (13963) 2012-06-10 19:47:53
#88 zuben c3 (zuben-c3) 100 (24853) 2012-06-11 13:28:58
#89 Daniel Richter (TheHiveMind) 100 (11147) 2012-06-12 15:28:02
#90 Steven Bi (chenhsi) 100 (1305) 2012-06-14 19:57:19
#91 Peter Grosse-Hering (Peter) 100 (8097) 2012-06-28 10:58:53
#92 Em Doulgerakis (Greko) 100 (124033) 2012-07-07 13:23:25
#93 Manfred Wurm (Tschabobo) 100 (8835) 2012-07-08 15:59:37
#94 Sebastian Slupina (Grandwizard) 100 (10866) 2012-07-12 00:13:18
#95 Stepan (m1sterx) 100 (19165) 2012-07-19 13:51:47
#96 L. (suse10) 100 (213) 2012-07-24 21:47:00
#97 masam (jimboo) 100 (18687) 2012-07-31 16:11:10
#98 chris_3stones (3stones) 100 (37759) 2012-08-03 21:01:26
#99 David (Neereus) 100 (1420) 2012-08-06 10:12:32
#100 Victoria Fehr (Rika) 100 (1472) 2012-08-15 13:46:31
#101 Deepak Raja N (deepakincredible) 100 (621) 2012-08-22 13:20:14
#102 Moritz Stocker (Trismegistos) 100 (2471) 2012-08-24 15:34:12
#103 RPH (derichard) 100 (27044) 2012-09-05 15:32:53
#104 Simone (Crimer) 100 (707) 2012-09-11 23:28:32
#105 Jan Knap (maddoxik) 100 (2458) 2012-09-19 21:21:56
#106 Hannes (Hartmann) 100 (8680) 2012-09-23 21:15:47
#107 Fjodor Karamasow (Fjodor) 100 (3326) 2012-09-23 22:00:05
#108 Patrick Renz (tarantulla) 100 (2027) 2012-09-27 15:08:56
#109 Hank (hanky) 100 (22859) 2012-09-30 18:27:39
#110 Anggia (Vuleedazula) 100 (1608) 2012-10-02 16:19:37
#111 Makc (max-violent) 100 (2583) 2012-10-11 11:52:30
#112 Paul Pantea (Soarele007) 100 (2695) 2012-10-12 16:48:05
#113 Alexander Dockhorn (Descartes) 100 (1200) 2012-10-27 00:54:59
#114 Roland Jansen (roland) 100 (17607) 2012-10-27 09:08:47
#115 George Ho (GeorgH) 100 (3095) 2012-10-27 09:25:41
#116 Lukas Juhrich (ljuhrich) 100 (5453) 2012-10-31 18:49:12
#117 misa (misa) 100 (503) 2012-11-02 12:53:38
#118 Martina (Nikita) 100 (3863) 2012-11-04 20:09:29
#119 The Enigma (enigma) 100 (14336) 2012-11-04 22:03:10
#120 Pierre Robier (tripleedged) 100 (5916) 2012-11-14 23:15:55
#121 Andrew (Agromania) 100 (4508) 2012-11-15 07:49:42
#122 Raphaël (Yahoo51) 100 (901) 2012-11-21 22:52:40
#123 Julia Werdelmann (jw) 100 (10407) 2012-11-22 23:53:14
#124 Andrea Palomba (shi) 100 (1248) 2012-11-25 17:55:27
#125 Long (longchuai) 100 (100) 2012-11-30 13:36:26
#126 Jan Temme (JaT3) 100 (11694) 2012-12-07 00:16:51
#127 Colin Benner (Colin) 100 (1413) 2012-12-09 22:20:25
#128 Hannes Nötzli (Faust) 100 (4781) 2012-12-16 15:04:01
#129 Camille (Kam139) 100 (2642) 2012-12-29 14:51:29
#130 Claude Laveaux (claude.laveaux) 100 (14504) 2013-01-05 18:25:09
#131 kevin shaw (steggily) 100 (2298) 2013-01-18 10:34:03
#132 Thomas Hahn (4OsoCg31XYcO) 100 (1703) 2013-01-18 20:58:29
#133 Iain Sharp (WoodenHedgehog) 100 (2196) 2013-01-22 14:10:44
#134 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-01-27 21:30:13
#135 Snake (snk) 100 (83889) 2013-01-28 15:34:53
#136 Michal (misoxxx) 100 (1710) 2013-01-30 17:56:43
#137 vanderguile (vanderguile) 100 (2916) 2013-03-14 01:51:14
#138 Hans Joachim Girulat (joregi) 100 (36278) 2013-03-19 22:41:40
#139 mk (bilbobeutlin) 100 (12340) 2013-03-23 18:27:14
#140 Jonathan (Elrond) 100 (801) 2013-03-26 14:33:27
#141 Gianluca Andriolo (Andriolo) 100 (3900) 2013-03-26 23:00:23
#142 Velko Nikolov (staafl) 100 (13467) 2013-04-05 19:23:11
#143 coldwaterq (coldwaterq) 100 (1705) 2013-04-11 06:31:09
#144 Ramon Rojas (superme) 100 (3409) 2013-04-20 03:56:38
#145 Mathias (KeNdo) 100 (2289) 2013-04-23 01:43:43
#146 Tron (Tron) 100 (7381) 2013-04-26 01:14:33
#147 swarmspider (swarmspider) 100 (4528) 2013-04-26 15:46:12
#148 boredStudent (boredStudent) 100 (800) 2013-04-26 17:34:13
#149 Stefan (sdn) 100 (5137) 2013-04-26 22:10:45
#150 HE (hendeng) 100 (1600) 2013-05-03 21:35:04
#151 Gabriel (mathgl24) 100 (2427) 2013-05-09 16:21:59
#152 Felix (Flix) 100 (13712) 2013-05-13 18:19:16
#153 djr (lentfri) 100 (2128) 2013-05-18 04:10:29
#154 Bentz (Wolfgang19) 100 (2583) 2013-05-20 09:55:41
#155 Almut (problelmo) 100 (45992) 2013-05-20 20:03:15
#156 A. S. (er1709) 100 (1608) 2013-05-21 03:09:24
#157 n a (jarofyarr) 100 (1901) 2013-05-23 13:14:53
#158 CryptY (Grompf) 100 (2880) 2013-05-28 18:37:29
#159 Kasia (TheKid) 100 (1103) 2013-05-31 23:40:32
#160 Steve (Samacian) 100 (23804) 2013-06-05 03:42:39
#161 Holti (Holti) 100 (6035) 2013-06-07 15:17:14
#162 Petra (humppapenguin) 100 (3872) 2013-06-17 13:45:15
#163 Gergely Simon (george314) 100 (16555) 2013-06-17 23:33:11
#164 Jay Kay (Merty) 100 (3726) 2013-06-18 20:16:11
#165 Friedemann (friede) 100 (3599) 2013-06-30 00:58:06
#166 Sascha (DoctorHell) 100 (1305) 2013-07-09 21:00:22
#167 Vlatiha Romanova (Vlatiha) 100 (10323) 2013-07-16 11:51:45
#168 Gronas (gronas) 100 (2667) 2013-07-17 21:22:41
#169 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-07-20 13:48:47
#170 Alexander Pöllmann (alexanderla) 100 (601) 2013-08-03 16:49:15
#171 Forrest Gump (Polyphem) 100 (38763) 2013-08-03 17:23:45
#172 Andreas H. (Cyrpius) 100 (2666) 2013-08-13 16:52:54
#173 Jaideep (Illusionist21) 100 (1325) 2013-08-23 04:02:35
#174 Geoffrey (FreshGod) 100 (2163) 2013-08-25 16:23:41
#175 George Lasry (george4096) 100 (302230) 2013-08-25 17:13:40
#176 Ryan (shdwstrk) 100 (3186) 2013-08-28 21:51:53
#177 Alexander (cruachan) 100 (16051) 2013-09-13 02:12:04
#178 Boris (Kaasu) 100 (16566) 2013-10-17 21:30:33
#179 Francisco Moraes (fmoraes) 100 (90044) 2013-11-05 22:03:43
#180 Jens (McStryke) 100 (1600) 2013-11-19 21:25:18
#181 fact (factoreal) 100 (400) 2013-11-23 04:24:48
#182 Jim Gillogly (Scryer) 100 (21260) 2013-12-02 08:03:46
#183 Brad (braddrew) 100 (15878) 2013-12-06 10:24:21
#184 cworstell (ace2) 100 (4870) 2013-12-08 06:41:08
#185 Alain (Integral) 100 (207924) 2013-12-15 08:47:39
#186 Max Mustermann (MustermM) 100 (6661) 2013-12-16 14:08:29
#187 Thomas (Elesthor) 100 (1100) 2013-12-24 22:55:08
#188 Csaba Fitzl (csaby) 100 (6696) 2013-12-29 20:16:56
#189 Kim H. S. (tenchijin) 100 (25468) 2014-01-01 22:10:49
#190 Joost (Joost) 100 (2653) 2014-01-02 16:58:04
#191 Pavel (haw) 100 (22728) 2014-01-02 18:58:42
#192 Shoukat (e195633) 100 (10617) 2014-01-04 22:15:29
#193 Sebastian Liebl (Basti van Tasti) 100 (2548) 2014-01-05 15:55:21
#194 Flo (sealth) 100 (13472) 2014-01-14 23:51:46
#195 fkronber (ketas) 100 (2148) 2014-01-16 14:12:07
#196 Petro (Luxo) 100 (300) 2014-01-21 07:33:19
#197 Mikhail (vms) 100 (300) 2014-01-29 12:16:29
#198 Marcel (bene1512) 100 (20896) 2014-01-30 17:40:36
#199 Marco (mawo25) 100 (2445) 2014-02-04 07:43:52
#200 Nofre Tete (noffi) 100 (21921) 2014-02-09 20:44:58
#201 Joerg Schaeffler (DrAcula) 100 (2948) 2014-03-01 17:25:49
#202 Ulf Nilsson (unilsson) 100 (1100) 2014-03-04 22:05:43
#203 Sascha (The Hoddich) 100 (4350) 2014-03-05 10:25:33
#204 Duy Khanh Dau (khanh45a3kct) 100 (5783) 2014-03-11 10:23:29
#205 hellman (hellman) 100 (14862) 2014-03-14 15:03:26
#206 mark (FivePrime) 100 (3345) 2014-03-21 16:32:09
#207 caesar ([caesar]) 100 (10738) 2014-03-23 13:18:59
#208 Karl Schutt (günter) 100 (41550) 2014-03-26 04:12:22
#209 Stuart (stuartg) 100 (3558) 2014-03-27 11:38:02
#210 Bernhard Gruber (bgr) 100 (22889) 2014-03-31 11:48:17
#211 yusef (yusef) 100 (3558) 2014-04-01 11:46:14
#212 Axel Reyno (axelreyno) 100 (2243) 2014-04-01 13:08:26
#213 Michael Doucha (mdou) 100 (13757) 2014-04-10 22:04:21
#214 Simone (Momo) 100 (5478) 2014-04-12 19:08:48
#215 Justin Case (usr) 100 (2039) 2014-04-27 14:53:59
#216 Nik (LastObserver) 100 (3552) 2014-04-30 17:21:30
#217 Igor (idipaolo) 100 (10639) 2014-05-01 00:54:29
#218 Thomas Schmucker (dg) 100 (26066) 2014-05-07 16:13:14
#219 Joe (IlmJoe) 100 (2938) 2014-05-07 21:43:25
#220 Michael (pheenyx) 100 (3840) 2014-05-23 20:10:07
#221 Javantea (Javantea) 100 (40816) 2014-05-24 12:20:57
#222 Josh (ustrease) 100 (2237) 2014-05-27 18:44:50
#223 pouria (blacksite) 100 (2113) 2014-05-30 20:37:46
#224 Felix Eckardt (Felck) 100 (3464) 2014-06-05 17:27:07
#225 Z (Amadeus) 100 (400) 2014-06-10 16:08:50
#226 Jian Wen (XxWappenxX) 100 (4048) 2014-06-22 18:47:58
#227 Hughes (hughes) 100 (7925) 2014-07-05 23:37:23
#228 Julia Bernotat (El Greco ) 100 (81129) 2014-07-07 19:08:07
#229 baz (oneiron) 100 (12353) 2014-07-16 03:47:10
#230 julius gaius (julius) 100 (25581) 2014-07-19 19:32:56
#231 Peter (51dc30ddc) 100 (10916) 2014-07-24 16:51:11
#232 Robert (rm) 100 (56475) 2014-07-31 21:49:59
#233 artmagic (artmagic) 100 (6298) 2014-08-15 22:19:57
#234 Tiloan (Tiloan) 100 (3840) 2014-08-17 21:06:28
#235 Lane Williams (planetlane) 100 (23948) 2014-08-19 04:18:52
#236 Isabella (Isa) 100 (4235) 2014-09-02 00:11:08
#237 Dmitry (DmitryMikhailov) 100 (1300) 2014-09-06 12:07:06
#238 Kerstin (herzchen412) 100 (3937) 2014-09-26 12:25:47
#239 testgrr (testgrr) 100 (3940) 2014-09-29 11:20:31
#240 Alexander Davis (acd05c) 100 (1100) 2014-10-02 18:31:39
#241 Behrooz Shahriari (bshahriari) 100 (2345) 2014-10-18 05:18:23
#242 Dan Knowles (dkdanknowles) 100 (300) 2014-10-20 15:28:46
#243 Señor Saturn (senorsaturn) 100 (3344) 2014-10-22 15:59:18
#244 jej (stationz) 100 (4939) 2014-11-20 09:26:03
#245 HolgerK (HolgerK) 100 (25776) 2014-11-24 17:43:12
#246 Michael Jeffrey (empjay) 100 (3004) 2014-11-29 20:06:52
#247 Hanna Trojer (hanuta) 100 (100) 2014-12-01 16:55:32
#248 Tim Fink (Magellan) 100 (4876) 2014-12-19 04:01:34
#249 AnirudhAnand (lucif3r) 100 (5445) 2014-12-19 07:25:31
#250 Claude Vaillancourt (Cl3v3r) 100 (38351) 2014-12-30 17:10:02
#251 Danny Higgins (hamster147) 100 (34088) 2014-12-31 01:16:35
#252 Kai Ludwig (TalentRaspel) 100 (15704) 2015-01-05 10:14:08
#253 Andreas Frerichs (Ossili) 100 (33266) 2015-01-20 13:34:19
#254 Kris (K$$$) 100 (3732) 2015-01-21 13:52:23
#255 S Combes (jerva) 100 (99132) 2015-01-29 21:55:30
#256 T (Wagner) 100 (16988) 2015-02-09 22:32:29
#257 Georgius Stolte (HazmatsFear) 100 (15671) 2015-02-15 22:25:01
#258 mirth23 (mirth23) 100 (7050) 2015-02-17 03:24:22
#259 micaman (micaman) 100 (4634) 2015-02-17 03:29:29
#260 Zonkism (zonkism) 100 (4004) 2015-02-17 03:56:48
#261 Victor Tobies (Donald) 100 (2567) 2015-02-20 21:29:47
#262 Felix (codeflx) 100 (1915) 2015-02-22 10:01:19
#263 Rainer Zufall (kiekuk) 100 (56786) 2015-02-22 19:52:31
#264 bill (llibyddap) 100 (2323) 2015-02-25 06:14:06
#265 Konstantin Golovan (SoulShaker) 100 (14091) 2015-02-28 12:00:20
#266 Philippe ALLARD (Flobert) 100 (4035) 2015-03-08 01:01:21
#267 Ignacio (Moebiusar) 100 (7390) 2015-03-11 20:39:07
#268 Mark Milhet (xwordmark1) 100 (2322) 2015-03-12 19:54:12
#269 iqmast (iqmast) 100 (2522) 2015-03-24 16:13:47
#270 Brian Kieslich (briank) 100 (6733) 2015-04-06 01:18:36
#271 S (Dingo_the_BB) 100 (6534) 2015-04-06 19:17:05
#272 Emily Montgommery (root) 100 (1100) 2015-04-10 00:11:06
#273 partamier (yann) 100 (5635) 2015-05-13 20:22:30
#274 Chris Randle (narny) 100 (3126) 2015-05-14 18:55:21
#275 Ethan (EESearch) 100 (3925) 2015-05-24 01:47:37
#276 Michael Ammon (Ammonym) 100 (7719) 2015-05-24 16:23:49
#277 Dave (compsec) 100 (3631) 2015-06-01 14:56:06
#278 Lennart (Penthesilea) 100 (4110) 2015-06-05 16:06:57
#279 Mark van Heeswijk (markvh) 100 (2600) 2015-07-05 21:05:14
#280 Erik (Erox) 100 (26141) 2015-07-12 22:32:55
#281 J-L Morel (Rossignol) 100 (29425) 2015-07-15 12:52:52
#282 Mehmet Adali (mehmetadali) 100 (2620) 2015-08-02 21:20:06
#283 Sirius (Leznar) 100 (4552) 2015-09-13 13:04:18
#284 Joerg G. (SnifferMaster) 100 (18154) 2015-09-14 13:50:54
#285 DG (poisson) 100 (700) 2015-09-22 04:41:08
#286 Alain Collignon (vexilla72) 100 (90800) 2015-09-28 16:36:34
#287 Sean (Kavanaugh) 100 (29143) 2015-09-28 22:28:37
#288 BananaJoee (BananaJoee) 100 (2515) 2015-10-07 22:15:25
#289 Alex (pwn3r) 100 (3418) 2015-10-23 10:39:30
#290 S (Zyphe) 100 (10461) 2015-10-24 11:22:57
#291 Foster (forst) 100 (2515) 2015-10-26 17:25:19
#292 Martin (martinbucher) 100 (27363) 2015-10-27 06:04:21
#293 koaidien (koaidien) 100 (2215) 2015-10-27 11:09:47
#294 Steph (Tartaglia) 100 (2010) 2015-10-29 15:26:52
#295 Szabó Zoltán (szabo.z87) 100 (55604) 2015-10-30 17:59:20
#296 Leo (Leocopo) 100 (2214) 2015-11-09 17:04:08
#297 Rainer (Rainer74) 100 (8417) 2015-12-04 22:24:52
#298 Peter (Garnet) 100 (14234) 2015-12-19 21:58:46
#299 Dominik M. (Sgt. Pepper) 100 (97919) 2015-12-20 16:48:39
#300 Daniel Neubacher (dneubacher) 100 (2413) 2016-01-06 19:55:52
#301 Spaceman (C. Nucleus) 100 (1401) 2016-01-22 13:45:00
#302 D (devilchn) 100 (11142) 2016-02-05 15:16:22
#303 WF (f077) 100 (6874) 2016-02-09 18:03:00
#304 dec248 (dec248) 100 (600) 2016-02-18 20:21:10
#305 Maria (julesjulchen) 100 (3019) 2016-02-20 13:13:37
#306 Marco Manfredi (mkk9901) 100 (17686) 2016-02-27 19:55:44
#307 Daniel DE ALMEIDA BRAGA (Faulst) 100 (701) 2016-03-15 11:53:49
#308 Fabian (XP-72) 100 (3707) 2016-06-08 20:27:34
#309 Flückiger (flueckda) 100 (2209) 2016-06-09 21:17:44
#310 Ho Chung Siu (soarerz) 100 (5314) 2016-06-28 10:22:00
#311 Joris Diesvelt (SylverFox) 100 (4019) 2016-06-30 22:35:14
#312 Norbert Biermann (Norbert) 100 (45031) 2016-07-06 20:17:30
#313 Tony Rodrigues (badinfluence) 100 (2208) 2016-07-31 16:10:38
#314 Benjamin Snavely (kaka) 100 (2708) 2016-08-10 21:26:29
#315 Jogie (Jogie) 100 (2221) 2016-08-14 00:13:21
#316 JoGo (JoGo) 100 (11686) 2016-08-30 20:50:26
#317 Marcin Zawadzki (harry007) 100 (3012) 2016-09-09 22:25:43
#318 Hajoe (Tintin-Muc) 100 (6923) 2016-09-14 21:38:42
#319 Nicolas (nicosPavlov) 100 (151166) 2016-09-28 18:56:04
#320 Daniel Walder (ibex) 100 (14372) 2016-10-07 08:27:37
#321 Meine Registrierung (TryC3) 100 (6045) 2016-10-08 16:10:43
#322 Julian (Lemmynator) 100 (17953) 2016-10-11 14:36:36
#323 Wall (Hadrian) 100 (4098) 2016-10-11 16:14:20
#324 thomas (lenoob) 100 (1000) 2016-10-24 04:30:44
#325 Ali Kanarie (Ali Kanarie) 100 (1900) 2016-11-06 16:45:48
#326 Tristan1473 (Tristan1473) 100 (18914) 2016-11-13 08:28:02
#327 Simon Jakob (simon.jakob) 100 (18714) 2016-11-21 18:54:24
#328 Michael (FoM) 100 (38953) 2016-12-07 00:49:17
#329 Steffen (stmue) 100 (2911) 2016-12-16 13:40:21
#330 John Stenmark (DoggedWit) 100 (2405) 2016-12-18 19:33:26
#331 J@cK (J@cK) 100 (3800) 2017-01-31 22:22:59
#332 Mihail (plexor) 100 (16827) 2017-02-22 10:06:04
#333 Mir Dim (mir0soft) 100 (72404) 2017-03-11 19:36:01
#334 chris (c2) 100 (51973) 2017-03-16 15:11:48
#335 Chicken Attack (joker1569) 100 (2603) 2017-03-20 15:29:53
#336 vsp (vsp) 100 (700) 2017-03-24 15:24:11
#337 amin edraki (edrak1) 100 (1595) 2017-04-30 01:50:09
#338 john doe (misio) 100 (7371) 2017-05-30 17:21:06
#339 Kasia (kasia-tutej) 100 (53366) 2017-06-01 22:28:57
#340 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-10 07:21:45
#341 Imam Uasa (Merricx) 100 (9188) 2017-06-13 14:49:51
#342 NGUYEN Ngoc Ky (kynguyenngoc) 100 (4974) 2017-07-11 15:51:30
#343 Moomin (Mushmom) 100 (7674) 2017-07-15 09:53:54
#344 Akonia (Akonia12) 100 (12153) 2017-07-17 20:02:05
#345 Godfrey Norton (Godfrey) 100 (8162) 2017-08-06 15:15:38
#346 Immo Weber (MandelToast) 100 (10061) 2017-08-15 20:11:53
#347 Mr. Fox (Mr. Fox) 100 (3395) 2017-08-27 20:51:45
#348 Snow (serpent) 100 (1301) 2017-09-07 16:27:30
#349 Neeraj (xOmega) 100 (1496) 2017-09-09 03:27:24
#350 Dennis Busch (0xDB) 100 (3693) 2017-09-25 19:46:55
#351 Dmitry Eremin-Solenikov (lumag) 100 (4482) 2017-10-16 15:58:21
#352 Handrich (Handrich) 100 (3494) 2017-11-17 17:57:57
#353 nimroth (nimroth cynthor) 100 (6021) 2017-11-18 18:53:17
#354 teetrnker (teetrinker) 100 (2399) 2018-01-03 22:13:50
#355 Aijun (geaijun) 100 (3379) 2018-01-07 11:49:09
#356 tamisrah (tamisrah) 100 (3134) 2018-01-14 11:50:53
#357 Ines (bufo01) 100 (4515) 2018-01-20 14:49:59
#358 Helmut (bonsai) 100 (3890) 2018-02-08 20:20:57
#359 Julian (Ju1703) 100 (4190) 2018-02-21 11:34:55
#360 Fedilia (Fedilia) 100 (4489) 2018-04-07 14:08:38
#361 Benjamin (200611736) 100 (10186) 2018-04-07 21:50:53
#362 Diego Ucharima (Diego_Ucharima) 100 (2206) 2018-04-25 21:33:18
#363 Steve Vaillancourt (stvai2) 100 (15041) 2018-04-26 00:06:32
#364 Anna (ronja11) 100 (4244) 2018-04-26 21:40:27
#365 Victor Cueva (Victoralin10) 100 (5282) 2018-04-28 06:16:57
#366 Luigi Castro Alvis (LuigiCastro21) 100 (2417) 2018-04-30 04:27:57
#367 Carlos (OzBlanco) 100 (3596) 2018-04-30 04:30:37
#368 Diego (DiegoRA) 100 (3697) 2018-04-30 06:25:37
#369 Eric (ExAstris) 100 (26990) 2018-05-15 22:24:37
#370 James (t2020) 100 (1997) 2018-05-30 15:28:45
#371 Christophe BORELLY (cb34) 100 (12358) 2018-06-01 11:55:20
#372 Christian (MarquisDeSud) 100 (7848) 2018-06-11 15:26:04
#373 Random Dude (rnd) 100 (90929) 2018-06-21 02:43:42
#374 sarah b (silva) 100 (26264) 2018-08-07 15:20:44
#375 Mathijs Verbeek (QIXL) 100 (3096) 2018-10-02 14:51:23
#376 Jörg Schwarzwälder (secuso) 100 (2125) 2018-10-06 13:16:47
#377 Aniruddh (ANIR) 100 (1192) 2018-10-09 22:13:05
#378 Thalhammer (Thalhammer) 100 (3784) 2018-10-17 12:11:31
#379 Ekrem Aydin (Eko115) 100 (1105) 2018-10-20 15:45:47
#380 Mart (Mart) 100 (3584) 2018-10-26 20:10:58
#381 Jan Kowalski (jankowalski25) 100 (2195) 2018-10-26 21:21:54
#382 phoenix1204 (phoenix1204) 100 (1800) 2018-10-28 17:47:18
#383 clyto (clytorock) 100 (3195) 2018-11-03 17:48:47
#384 Manfred Paul (manf) 100 (14774) 2018-11-13 22:47:31
#385 whitecowboy (whitecowboy) 100 (7446) 2018-12-22 07:57:22
#386 Piotr (lesnik7) 100 (8171) 2019-01-11 10:04:36
#387 Bertolo (Bertolo) 100 (7167) 2019-01-12 18:21:06
#388 Marc (rcll0891) 100 (24004) 2019-01-20 19:20:31
#389 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-05 21:57:39
#390 Thomas Schlögl (slog) 100 (400) 2019-02-06 13:21:59
#391 Rolfe Bozier (rolfe) 100 (4769) 2019-02-09 03:10:17
#392 simone (xseris) 100 (8632) 2019-02-14 23:40:36
#393 madness (madness) 100 (15407) 2019-02-15 03:17:21
#394 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-17 02:20:09
#395 Lia (Lia) 100 (6855) 2019-03-08 19:25:24
#396 Alex (Meiny) 100 (5136) 2019-03-13 21:46:52
#397 Mike (RogueRamblers) 100 (29805) 2019-03-13 22:38:16
#398 Piyush Agarwal (Piyushgrwl) 100 (4795) 2019-03-20 21:28:10
#399 ykaridi (ykaridi) 100 (7035) 2019-03-22 07:49:25
#400 Klaus (kumaus) 100 (21415) 2019-03-26 16:21:37
#401 Jurian (Jurian95) 100 (2793) 2019-03-29 20:41:44
#402 Darchicourt (Darki) 100 (3308) 2019-04-10 16:28:45
#403 Marco Cinelli (Snap) 100 (28365) 2019-04-19 23:42:37
#404 Eugene (lim0n) 100 (54954) 2019-04-24 14:20:03
#405 r karoly (r_karoly) 100 (4078) 2019-05-01 16:08:22
#406 Mirko Rendey (Biork) 100 (6595) 2019-05-23 14:37:57
#407 Aeon (dokyriak) 100 (4081) 2019-05-24 11:16:57
#408 Jeff (Fountain) 100 (8788) 2019-05-30 21:04:08
#409 ENOENT (ENOENT) 100 (13478) 2019-05-31 13:59:41
#410 An Viet Pham (S1lv3r) 100 (7927) 2019-06-07 18:31:02
#411 Simon Hemmerich (simhem) 100 (3779) 2019-06-11 22:24:31
#412 mhkla (mhkla) 100 (3580) 2019-06-14 09:03:03
#413 Stephan (Stephje1978) 100 (26961) 2019-06-19 00:42:04
#414 mighty_maharaja (mighty_maharaja) 100 (2592) 2019-06-23 08:27:09
#415 yult (yult) 100 (12185) 2019-07-01 07:55:01
#416 Soutik Nandy (100tick) 100 (5651) 2019-07-05 12:56:57
#417 gerdw (gerdw) 100 (28315) 2019-07-07 21:11:31
#418 ajg (ludimus) 100 (11914) 2019-07-17 10:44:46
#419 Dr. Peter Uelkes (RandyWaterhouse) 100 (9990) 2019-07-29 07:43:54
#420 Mike Jewell (mjewell) 100 (3579) 2019-08-10 23:29:07
#421 h4rdl0ck (h4rdl0ck) 100 (3079) 2019-09-18 14:21:41
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Turing Bombe Enigma I

[hoerenberg-02] - 59 users already solved this challenge, 1 is working on it.
 
 
 

You intercepted two ENIGMA I messages. Both are dated from the same day. Use a Turing Bombe to find out the key of the day and decipher the solution.
Read more...

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

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-17 18:36
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#59) Achieved points (Global score) y-m-d - h:m:s

Seth Kintigh (DarkFibre) 200 (79471) 2011-10-17 20:20:23
Viktor (Veselovský) 200 (155163) 2011-10-18 02:18:54
David (aki321) 200 (27482) 2011-10-18 11:54:49
J. M. (jomandi) 200 (113270) 2011-10-18 15:36:10
#5 Armin Krauss (argh) 150 (188214) 2011-10-18 19:36:31
#6 Mutziman (mutziman) 133 (250) 2011-10-20 17:15:04
#7 Christian Matt (Luy) 120 (9889) 2011-10-22 03:15:22
#8 Dano (Dano) 107 (14610) 2011-10-30 20:02:47
#9 Michal Musilek (mim3) 106 (1121) 2011-11-04 17:06:07
#10 Bart den Hartog (Bart13) 104 (144081) 2011-11-09 01:51:12
#11 Sebastian Fischer (fischers) 103 (308) 2011-11-23 17:51:27
#12 Lassu Eger (Hun) (slowmouse) 102 (1118) 2011-11-27 19:43:13
#13 Jay Kay (Merty) 101 (3726) 2011-12-22 18:16:52
#14 j.h. (haegarq) 101 (15252) 2012-02-29 17:53:18
#15 JBBom (hn51) 101 (1442) 2012-04-02 09:23:04
#16 Jais (oliver43) 101 (1743) 2012-04-04 19:41:04
#17 DirkS (Dustman) 101 (8479) 2012-04-09 12:12:12
#18 George (Theofanidis) 101 (112184) 2012-04-23 18:16:05
#19 Aliazer (Aliazer) 101 (12314) 2012-04-26 19:26:50
#20 Thomas Lambert (lambert) 100 (35237) 2012-05-08 17:48:15
#21 Luigi Tomelli (archstanton) 100 (108345) 2012-06-10 16:57:37
#22 tamisrah (tamisrah) 100 (3134) 2012-08-16 04:05:19
#23 chris_3stones (3stones) 100 (37759) 2012-08-19 09:13:37
#24 Kurt Gebauer (Yokozuna) 100 (177433) 2012-10-04 17:25:05
#25 H. Lautenschlager (helmi) 100 (32947) 2012-10-05 14:49:58
#26 Em Doulgerakis (Greko) 100 (124033) 2012-10-20 22:16:07
#27 KW (qwer*) 100 (13963) 2012-12-19 21:51:17
#28 Hans Peter (hanspeter) 100 (52256) 2013-01-28 20:12:04
#29 Frans (fransl) 100 (2233) 2013-02-27 12:45:09
#30 Snake (snk) 100 (83889) 2013-03-14 10:25:03
#31 RPH (derichard) 100 (27044) 2013-04-04 20:51:39
#32 E.T (Ertheb) 100 (81809) 2013-06-25 22:42:04
#33 George Lasry (george4096) 100 (302230) 2013-08-17 01:59:13
#34 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-08-17 22:09:52
#35 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-24 19:07:02
#36 Francisco Moraes (fmoraes) 100 (90044) 2013-11-13 17:14:07
#37 Michael Möller (michaelm) 100 (175129) 2013-12-05 16:36:22
#38 Jim Gillogly (Scryer) 100 (21260) 2013-12-06 01:31:09
#39 Dusan (xxdradus) 100 (40236) 2013-12-13 16:41:13
#40 Alain (Integral) 100 (207924) 2013-12-19 20:03:18
#41 Marcel (bene1512) 100 (20896) 2014-02-15 11:14:19
#42 Robert (rm) 100 (56475) 2014-08-08 23:36:26
#43 jej (stationz) 100 (4939) 2014-11-08 16:34:37
#44 Rainer Zufall (kiekuk) 100 (56786) 2015-02-26 20:33:17
#45 Bernhard Gruber (bgr) 100 (22889) 2015-03-18 20:54:36
#46 Hans Joachim Girulat (joregi) 100 (36278) 2015-04-16 23:40:57
#47 Andreas Frerichs (Ossili) 100 (33266) 2015-05-16 00:34:53
#48 Claude Vaillancourt (Cl3v3r) 100 (38351) 2015-09-18 15:39:56
#49 Szabó Zoltán (szabo.z87) 100 (55604) 2016-01-26 16:31:57
#50 Norbert Biermann (Norbert) 100 (45031) 2016-08-27 22:39:01
#51 Nicolas (nicosPavlov) 100 (151166) 2016-10-23 10:15:30
#52 Dominik M. (Sgt. Pepper) 100 (97919) 2017-04-03 00:08:28
#53 Mir Dim (mir0soft) 100 (72404) 2017-05-11 19:46:27
#54 Alain Collignon (vexilla72) 100 (90800) 2017-06-09 16:42:26
#55 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-21 19:26:39
#56 Random Dude (rnd) 100 (90929) 2018-09-09 16:52:10
#57 Michael (FoM) 100 (38953) 2018-12-03 18:59:33
#58 sarah b (silva) 100 (26264) 2018-12-09 21:21:09
#59 Mike (RogueRamblers) 100 (29805) 2019-05-10 22:37:15
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An Invisible Message

[veselovsky-08] - 52 users already solved this challenge, 13 are working on it.
 
 
 

A friend of yours sent you a file that seems to be empty. Was it just a mistake or is there a secret to reveal?
Read more...

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

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-17 18:25
Maximum number of attempts for this challenge: 10

All successful users of this challenge

Rank User (#52) Achieved points (Global score) y-m-d - h:m:s

Seth Kintigh (DarkFibre) 200 (79471) 2011-10-17 22:25:26
J. M. (jomandi) 200 (113270) 2011-10-18 15:35:46
Armin Krauss (argh) 150 (188214) 2011-10-18 19:36:47
Dano (Dano) 107 (14610) 2011-10-30 18:31:14
#5 Christian Matt (Luy) 107 (9889) 2011-10-31 22:02:55
#6 The Killer (Killer) 104 (42393) 2011-11-09 02:47:16
#7 Bart den Hartog (Bart13) 103 (144081) 2011-11-14 20:37:29
#8 Michael Möller (michaelm) 102 (175129) 2011-11-30 15:14:04
#9 John Willemse (Melting Brains) 102 (1316) 2011-12-13 14:19:25
#10 Jascha Koch (yosh) 101 (2201) 2011-12-29 13:26:31
#11 Peter Mustermann (Gummiboot) 101 (60285) 2011-12-29 14:09:40
#12 Mayuresh Anand (effort2break) 101 (8728) 2011-12-29 18:58:48
#13 Wombat (Wombat) 101 (5822) 2012-01-06 15:34:27
#14 Tom Tox (tox) 101 (17708) 2012-02-02 10:44:32
#15 h3po (h3po) 101 (20433) 2012-02-07 12:17:00
#16 J Br (j.br) 101 (3242) 2012-02-29 14:22:41
#17 Hans Peter (hanspeter) 101 (52256) 2012-03-24 12:20:58
#18 Kurt Gebauer (Yokozuna) 101 (177433) 2012-04-01 20:52:07
#19 Dusan (xxdradus) 100 (40236) 2012-06-09 15:28:24
#20 E.T (Ertheb) 100 (81809) 2012-07-23 18:22:20
#21 Harry (Schwabenbambi) 100 (2409) 2012-10-11 17:22:07
#22 Stepan (m1sterx) 100 (19165) 2012-11-07 12:18:29
#23 Hans Joachim Girulat (joregi) 100 (36278) 2013-04-29 16:47:56
#24 Peter Grosse-Hering (Peter) 100 (8097) 2013-07-03 20:42:18
#25 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-09-10 23:55:21
#26 Pavel (haw) 100 (22728) 2014-01-15 18:07:04
#27 Kim H. S. (tenchijin) 100 (25468) 2014-03-17 12:22:29
#28 Tina (BTina) 100 (1500) 2014-06-03 01:50:02
#29 Karl Schutt (günter) 100 (41550) 2014-08-09 21:33:52
#30 julius gaius (julius) 100 (25581) 2014-09-10 13:27:35
#31 Robert (rm) 100 (56475) 2014-09-26 00:42:04
#32 Francisco Moraes (fmoraes) 100 (90044) 2014-11-06 19:46:29
#33 Julia Bernotat (El Greco ) 100 (81129) 2014-11-09 22:40:35
#34 George (Theofanidis) 100 (112184) 2014-11-18 16:59:20
#35 Bernhard Gruber (bgr) 100 (22889) 2014-11-19 10:45:35
#36 HolgerK (HolgerK) 100 (25776) 2015-01-15 21:59:13
#37 Andreas Frerichs (Ossili) 100 (33266) 2015-04-08 19:41:48
#38 Alain (Integral) 100 (207924) 2015-07-31 15:44:17
#39 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-07 18:29:04
#40 Rainer Zufall (kiekuk) 100 (56786) 2015-12-08 09:23:09
#41 Dominik M. (Sgt. Pepper) 100 (97919) 2015-12-31 16:41:13
#42 Nicolas (nicosPavlov) 100 (151166) 2016-12-03 09:43:40
#43 S (Zyphe) 100 (10461) 2017-01-11 21:24:14
#44 chris (c2) 100 (51973) 2017-03-21 22:58:34
#45 Mir Dim (mir0soft) 100 (72404) 2017-04-04 20:33:34
#46 D3d4lu5 (D3d4lu5) 100 (297709) 2017-12-27 10:15:42
#47 Ines (bufo01) 100 (4515) 2018-01-20 14:05:36
#48 Alain Collignon (vexilla72) 100 (90800) 2018-06-09 09:14:29
#49 Random Dude (rnd) 100 (90929) 2018-10-22 23:18:36
#50 Michael (FoM) 100 (38953) 2018-11-24 02:10:33
#51 madness (madness) 100 (15407) 2019-02-14 13:03:43
#52 Mike (RogueRamblers) 100 (29805) 2019-06-24 17:28:15
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Grille Cipher

[meier-01] - 395 users already solved this challenge, 30 are working on it.
 
 
 

You need to reconstruct some fields of the grille to decrypt the message written on an old note.
Read more...

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

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-14 18:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#395) Achieved points (Global score) y-m-d - h:m:s

Daniel Fretwell (fretty) 200 (30107) 2011-10-14 18:18:57
Alexander Dockhorn (Descartes) 200 (1200) 2011-10-14 18:47:18
TURINGBOMBE (TBREAKER) 200 (10616) 2011-10-14 19:04:04
Viktor (Veselovský) 200 (155163) 2011-10-14 19:55:13
#5 J. M. (jomandi) 200 (113270) 2011-10-14 20:53:57
#6 Seth Kintigh (DarkFibre) 200 (79471) 2011-10-14 20:55:24
#7 Armin Krauss (argh) 200 (188214) 2011-10-14 21:10:46
#8 David (aki321) 200 (27482) 2011-10-15 00:49:15
#9 Roland Jansen (roland) 200 (17607) 2011-10-15 13:48:02
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#309 Mir Dim (mir0soft) 100 (72404) 2017-03-11 19:10:53
#310 chris (c2) 100 (51973) 2017-03-16 17:00:04
#311 Kai Fischell (MrFlector) 100 (1433) 2017-03-19 20:05:04
#312 Chicken Attack (joker1569) 100 (2603) 2017-03-21 05:02:15
#313 sarah b (silva) 100 (26264) 2017-03-23 20:32:17
#314 Ex Machina (Crazyeights) 100 (400) 2017-03-25 03:59:19
#315 Martin S (snowy) 100 (900) 2017-04-06 15:25:26
#316 Anggia (Vuleedazula) 100 (1608) 2017-04-27 14:22:42
#317 Kasia (kasia-tutej) 100 (53366) 2017-05-29 17:16:28
#318 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-10 02:14:46
#319 Moomin (Mushmom) 100 (7674) 2017-07-15 10:32:56
#320 Akonia (Akonia12) 100 (12153) 2017-07-17 20:15:35
#321 Immo Weber (MandelToast) 100 (10061) 2017-08-13 15:08:28
#322 Godfrey Norton (Godfrey) 100 (8162) 2017-08-20 18:53:09
#323 Mr. Fox (Mr. Fox) 100 (3395) 2017-08-27 20:53:55
#324 Dennis Busch (0xDB) 100 (3693) 2017-09-26 16:05:39
#325 Dmitry Eremin-Solenikov (lumag) 100 (4482) 2017-10-16 10:56:05
#326 nimroth (nimroth cynthor) 100 (6021) 2017-11-21 18:44:02
#327 Samuel (Samusicus) 100 (2203) 2018-01-07 15:57:28
#328 Helmut (bonsai) 100 (3890) 2018-02-08 20:56:07
#329 Julian (Ju1703) 100 (4190) 2018-02-21 13:36:33
#330 Benjamin (200611736) 100 (10186) 2018-04-01 20:08:51
#331 Lara Riegelhofer (larrow_sparrow) 100 (2798) 2018-04-02 23:54:51
#332 Luigi Castro Alvis (LuigiCastro21) 100 (2417) 2018-04-19 03:40:00
#333 Diego (DiegoRA) 100 (3697) 2018-04-19 03:41:33
#334 Lucio (lcalderonc) 100 (1251) 2018-04-24 01:07:18
#335 Steve Vaillancourt (stvai2) 100 (15041) 2018-04-27 00:50:13
#336 Allisat (psychohasii) 100 (4356) 2018-04-29 17:43:33
#337 Victor Cueva (Victoralin10) 100 (5282) 2018-04-29 22:57:35
#338 Jordy Reategui Rivera (eljordy) 100 (600) 2018-04-29 23:06:26
#339 Eric (ExAstris) 100 (26990) 2018-05-15 23:00:22
#340 Christophe BORELLY (cb34) 100 (12358) 2018-06-01 13:27:36
#341 Fedilia (Fedilia) 100 (4489) 2018-06-09 08:09:41
#342 Christian (MarquisDeSud) 100 (7848) 2018-06-15 14:54:01
#343 James (t2020) 100 (1997) 2018-06-20 12:39:01
#344 Random Dude (rnd) 100 (90929) 2018-06-21 13:44:20
#345 E41514019 (E41514019) 100 (2885) 2018-07-04 06:20:37
#346 Napoleon (Cenlan) 100 (400) 2018-07-17 19:15:33
#347 MMunkun (MMunkun) 100 (900) 2018-09-01 19:53:49
#348 HowarthStudios (HowarthStudios) 100 (3596) 2018-09-12 17:15:30
#349 Mathijs Verbeek (QIXL) 100 (3096) 2018-10-02 15:12:41
#350 Beamofoldlight (Beamofoldlight) 100 (3745) 2018-10-16 14:06:00
#351 Thalhammer (Thalhammer) 100 (3784) 2018-10-17 18:28:49
#352 Mart (Mart) 100 (3584) 2018-10-26 21:55:38
#353 freak_out (freak_out) 100 (803) 2018-10-26 23:08:33
#354 Wolvitor (Wolvitor) 100 (600) 2018-10-28 16:19:02
#355 phoenix1204 (phoenix1204) 100 (1800) 2018-10-28 18:23:26
#356 Manfred Paul (manf) 100 (14774) 2018-11-13 23:01:11
#357 Clemens (16dombrowski) 100 (5136) 2018-12-15 00:23:06
#358 Svetlana Lessin (16Lessin) 100 (2294) 2018-12-17 23:03:47
#359 Alex (Meiny) 100 (5136) 2018-12-18 20:47:51
#360 whitecowboy (whitecowboy) 100 (7446) 2018-12-22 09:09:33
#361 Hipster (Hipster) 100 (1789) 2018-12-30 02:54:38
#362 Piotr (lesnik7) 100 (8171) 2019-01-11 10:36:22
#363 Bertolo (Bertolo) 100 (7167) 2019-01-12 14:46:48
#364 Joe Doe (tr_joedoe) 100 (1600) 2019-01-22 19:01:21
#365 Sergej Schalew (CryptoSolver) 100 (600) 2019-01-28 15:40:58
#366 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-06 00:12:58
#367 Rolfe Bozier (rolfe) 100 (4769) 2019-02-09 03:25:05
#368 simone (xseris) 100 (8632) 2019-02-15 18:55:47
#369 León (skrilly4) 100 (2294) 2019-02-17 01:15:56
#370 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-17 02:37:56
#371 madness (madness) 100 (15407) 2019-02-22 04:03:25
#372 Lia (Lia) 100 (6855) 2019-03-09 19:02:31
#373 E41614006 (E41614006) 100 (2188) 2019-03-10 02:30:11
#374 Mike (RogueRamblers) 100 (29805) 2019-03-13 23:31:10
#375 Piyush Agarwal (Piyushgrwl) 100 (4795) 2019-03-20 22:21:04
#376 steven (steven18) 100 (3091) 2019-03-23 21:50:35
#377 Klaus (kumaus) 100 (21415) 2019-03-28 00:14:31
#378 Jurian (Jurian95) 100 (2793) 2019-03-29 21:15:49
#379 Marco Cinelli (Snap) 100 (28365) 2019-04-25 13:02:28
#380 r karoly (r_karoly) 100 (4078) 2019-05-01 10:41:35
#381 Jeff (Fountain) 100 (8788) 2019-05-26 01:09:07
#382 ENOENT (ENOENT) 100 (13478) 2019-05-31 14:38:20
#383 An Viet Pham (S1lv3r) 100 (7927) 2019-06-03 17:51:56
#384 Stephan (Stephje1978) 100 (26961) 2019-06-19 01:11:09
#385 mighty_maharaja (mighty_maharaja) 100 (2592) 2019-06-23 11:02:34
#386 Anna (Timimim) 100 (1892) 2019-06-29 14:25:17
#387 yult (yult) 100 (12185) 2019-07-01 19:28:56
#388 mhkla (mhkla) 100 (3580) 2019-07-03 22:40:58
#389 Soutik Nandy (100tick) 100 (5651) 2019-07-05 11:37:18
#390 gerdw (gerdw) 100 (28315) 2019-07-08 17:07:59
#391 Manfred (katatonius) 100 (2394) 2019-07-11 16:33:04
#392 ajg (ludimus) 100 (11914) 2019-07-15 09:55:23
#393 Dr. Peter Uelkes (RandyWaterhouse) 100 (9990) 2019-07-28 16:11:56
#394 Mike Jewell (mjewell) 100 (3579) 2019-08-10 23:56:04
#395 Eugene (lim0n) 100 (54954) 2019-09-12 09:26:29
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Double Columnar Transposition

[dano-01] - 89 users already solved this challenge, 1 is working on it.
 
 
 

Asterix and Obelix besiege Rome. They just happened to find an encrypted message but instead of the common Caesar Cipher the Romans used a new method. Can you decrypt the message?
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-10-12 14:03
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

Armin Krauss (argh) 200 (188214) 2011-10-12 21:40:42
Michael Möller (michaelm) 200 (175129) 2011-10-12 21:53:10
J. M. (jomandi) 200 (113270) 2011-10-12 22:10:29
Seth Kintigh (DarkFibre) 200 (79471) 2011-10-13 05:35:12
#5 Viktor (Veselovský) 200 (155163) 2011-10-13 13:28:12
#6 The Killer (Killer) 133 (42393) 2011-10-14 18:25:38
#7 David (aki321) 104 (27482) 2011-11-08 14:25:16
#8 Bart den Hartog (Bart13) 102 (144081) 2011-11-30 01:04:15
#9 Wombat (Wombat) 102 (5822) 2011-12-11 14:47:18
#10 Flo Geht_dich gar_nichts_an (flo) 102 (6271) 2011-12-11 20:01:17
#11 Jascha Koch (yosh) 101 (2201) 2011-12-28 18:39:36
#12 Peter Mustermann (Gummiboot) 101 (60285) 2012-01-13 17:52:34
#13 Hans Peter (hanspeter) 101 (52256) 2012-02-17 13:37:43
#14 Kurt Gebauer (Yokozuna) 101 (177433) 2012-03-13 19:08:44
#15 George (Theofanidis) 101 (112184) 2012-03-21 19:51:17
#16 Aliazer (Aliazer) 101 (12314) 2012-04-22 22:19:29
#17 Michel Van Caneghem (vancan) 100 (49719) 2012-06-12 09:46:27
#18 Daniel Richter (TheHiveMind) 100 (11147) 2012-06-13 12:53:59
#19 Sebastian Slupina (Grandwizard) 100 (10866) 2012-07-13 13:08:43
#20 chris_3stones (3stones) 100 (37759) 2012-08-17 08:07:52
#21 Em Doulgerakis (Greko) 100 (124033) 2012-08-23 11:44:13
#22 gromone (gromone) 100 (501) 2012-12-20 21:24:58
#23 KW (qwer*) 100 (13963) 2013-01-07 21:22:49
#24 Snake (snk) 100 (83889) 2013-03-18 13:17:30
#25 Luigi Tomelli (archstanton) 100 (108345) 2013-03-25 09:16:33
#26 Ramon Rojas (superme) 100 (3409) 2013-04-14 14:16:59
#27 RPH (derichard) 100 (27044) 2013-04-24 23:38:35
#28 boredStudent (boredStudent) 100 (800) 2013-04-26 14:10:39
#29 Almut (problelmo) 100 (45992) 2013-06-06 21:12:30
#30 E.T (Ertheb) 100 (81809) 2013-06-15 06:54:06
#31 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-29 12:49:04
#32 Vlatiha Romanova (Vlatiha) 100 (10323) 2013-08-30 12:16:19
#33 George Lasry (george4096) 100 (302230) 2013-09-04 00:51:59
#34 Steve (Samacian) 100 (23804) 2013-11-01 05:07:11
#35 Jim Gillogly (Scryer) 100 (21260) 2013-12-02 08:46:35
#36 Alain (Integral) 100 (207924) 2013-12-19 11:40:52
#37 maddin (grazertwo) 100 (100) 2013-12-28 22:23:36
#38 Bertold (bk) 100 (9673) 2013-12-30 14:56:56
#39 Kim H. S. (tenchijin) 100 (25468) 2014-02-12 16:39:18
#40 Thomas Schmucker (dg) 100 (26066) 2014-05-29 19:14:08
#41 Francisco Moraes (fmoraes) 100 (90044) 2014-06-26 00:15:20
#42 j.h. (haegarq) 100 (15252) 2014-07-16 06:39:03
#43 Robert (rm) 100 (56475) 2014-07-31 22:49:33
#44 Erich (ErichSt) 100 (4862) 2014-09-01 15:15:17
#45 Thomas Lambert (lambert) 100 (35237) 2014-09-11 08:20:08
#46 Bernhard Gruber (bgr) 100 (22889) 2014-09-18 12:07:54
#47 Andreas Frerichs (Ossili) 100 (33266) 2014-11-11 10:11:13
#48 HolgerK (HolgerK) 100 (25776) 2014-12-09 19:52:26
#49 Pavel (haw) 100 (22728) 2014-12-12 20:48:00
#50 Julia Bernotat (El Greco ) 100 (81129) 2014-12-22 18:25:49
#51 Dusan (xxdradus) 100 (40236) 2015-02-02 16:32:38
#52 mirth23 (mirth23) 100 (7050) 2015-02-23 13:14:23
#53 TURINGBOMBE (TBREAKER) 100 (10616) 2015-03-06 03:36:47
#54 S Combes (jerva) 100 (99132) 2015-03-22 21:11:18
#55 Rainer Zufall (kiekuk) 100 (56786) 2015-03-30 21:38:10
#56 partamier (yann) 100 (5635) 2015-05-15 10:46:19
#57 J-L Morel (Rossignol) 100 (29425) 2015-07-27 08:13:37
#58 Alain Collignon (vexilla72) 100 (90800) 2015-11-03 09:25:58
#59 Szabó Zoltán (szabo.z87) 100 (55604) 2016-01-05 13:14:22
#60 Marc (rcll0891) 100 (24004) 2016-01-10 21:33:57
#61 Hans Joachim Girulat (joregi) 100 (36278) 2016-01-20 14:44:16
#62 Karl Schutt (günter) 100 (41550) 2016-03-09 19:06:32
#63 Peter (Garnet) 100 (14234) 2016-03-24 12:18:23
#64 Lennart (Penthesilea) 100 (4110) 2016-04-17 15:16:13
#65 Lane Williams (planetlane) 100 (23948) 2016-05-03 17:53:31
#66 Norbert Biermann (Norbert) 100 (45031) 2016-07-15 16:55:50
#67 Nicolas (nicosPavlov) 100 (151166) 2016-10-12 14:46:12
#68 Martin (martinbucher) 100 (27363) 2016-11-13 10:41:17
#69 Simon Jakob (simon.jakob) 100 (18714) 2016-12-01 21:48:20
#70 quantenmagier (quantenmagier) 100 (2338) 2016-12-25 03:00:47
#71 Marcel (bene1512) 100 (20896) 2017-01-06 14:38:19
#72 Michael (FoM) 100 (38953) 2017-01-17 08:19:15
#73 Dominik M. (Sgt. Pepper) 100 (97919) 2017-03-27 14:01:00
#74 chris (c2) 100 (51973) 2017-04-04 19:24:39
#75 Mir Dim (mir0soft) 100 (72404) 2017-04-04 21:28:28
#76 Daniel Walder (ibex) 100 (14372) 2017-04-24 22:20:07
#77 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-17 14:44:30
#78 Danny Higgins (hamster147) 100 (34088) 2017-08-06 16:03:55
#79 Dex (Dex) 100 (100) 2017-10-02 20:31:32
#80 René Peschmann (Varon) 100 (2315) 2018-03-16 21:30:37
#81 Nofre Tete (noffi) 100 (21921) 2018-03-18 19:35:53
#82 Eric (ExAstris) 100 (26990) 2018-05-19 23:51:06
#83 Random Dude (rnd) 100 (90929) 2018-07-17 12:23:37
#84 zuben c3 (zuben-c3) 100 (24853) 2019-01-07 13:34:03
#85 sarah b (silva) 100 (26264) 2019-02-02 21:27:06
#86 madness (madness) 100 (15407) 2019-02-27 13:25:58
#87 Stephan (Stephje1978) 100 (26961) 2019-07-15 01:06:49
#88 Mike (RogueRamblers) 100 (29805) 2019-07-18 02:53:21
#89 H. Lautenschlager (helmi) 100 (32947) 2019-08-15 23:06:09
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   +++    [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'    +++    [07:21 - 18.09.2019] h4rdl0ck solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++