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 (296)

Ordered by date posted, the most recent appear first.

ORYX Stream Cipher — Part 4d

[stamp-14] - 0 users already solved this challenge, 1 is working on it.
 
 
 

The ORYX stream cipher consists of three 32-bit LFSRs X, A, B which are shifted differently depending on some bits in the LFSR X. The key stream is a combination of the highest 8 bits of each of the three LFSRs. It is neither feasible nor necessary to search the whole 96-bit key space, there are more efficient methods!
Read more...

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Click here to download the additional file of the challenge.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-06-27 11:38
Maximum number of attempts for this challenge: 15

All successful users of this challenge

No one solved the challenge right now. Be the first!
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ORYX Stream Cipher — Part 3 (revised)

[stamp-13] - 29 users already solved this challenge, 1 is working on it.
 
 
 

The ORYX stream cipher consists of three 32-bit LFSRs X, A, B which are shifted differently depending on some bits in the LFSR X. The key stream is a combination of the highest 8 bits of each of the three LFSRs. It is neither feasible nor necessary to search the whole 96-bit key space, there are more efficient methods!
Read more...

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

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-06-06 20:39
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#29) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 2000 (155163) 2013-06-06 22:17:21
J. M. (jomandi) 2000 (113270) 2013-06-06 23:37:08
Kurt Gebauer (Yokozuna) 2000 (177433) 2013-06-07 03:14:23
George (Theofanidis) 2000 (113380) 2013-06-07 05:16:04
#5 Armin Krauss (argh) 2000 (188214) 2013-06-07 20:33:29
#6 Hans Peter (hanspeter) 1547 (52256) 2013-06-13 12:21:44
#7 Luigi Tomelli (archstanton) 1523 (108345) 2013-06-13 22:19:41
#8 Em Doulgerakis (Greko) 1349 (131437) 2013-07-03 09:44:44
#9 zahir mohsen moradi (ariobarzan) 1337 (99757) 2013-07-06 06:44:49
#10 Forrest Gump (Polyphem) 1196 (38763) 2013-11-25 21:40:40
#11 Francisco Moraes (fmoraes) 1194 (90044) 2013-12-01 06:21:38
#12 Alain (Integral) 1180 (207924) 2014-01-20 17:25:01
#13 Bart den Hartog (Bart13) 1163 (144081) 2014-04-22 23:36:42
#14 S Combes (jerva) 1137 (99132) 2015-01-25 09:27:26
#15 Claude Vaillancourt (Cl3v3r) 1134 (38351) 2015-03-06 17:02:44
#16 E.T (Ertheb) 1127 (81809) 2015-07-14 12:08:23
#17 Javantea (Javantea) 1125 (40816) 2015-08-28 20:04:24
#18 Martin Härterich (HaeM) 1124 (15149) 2015-10-06 14:59:08
#19 Alain Collignon (vexilla72) 1121 (96903) 2015-12-17 19:31:00
#20 Julia Bernotat (El Greco ) 1120 (81129) 2015-12-31 13:58:43
#21 Karl Schutt (günter) 1118 (41550) 2016-03-20 19:29:38
#22 Rider (alrider) 1113 (7214) 2016-09-05 00:06:31
#23 Nicolas (nicosPavlov) 1111 (151166) 2016-11-04 18:01:00
#24 Kasia (kasia-tutej) 1106 (53366) 2017-06-27 12:49:21
#25 D3d4lu5 (D3d4lu5) 1106 (297709) 2017-06-28 06:03:12
#26 George Lasry (george4096) 1106 (302230) 2017-06-28 15:20:52
#27 Michael (FoM) 1096 (38953) 2019-02-18 13:22:49
#28 Klaus (kumaus) 1096 (21415) 2019-04-16 10:28:33
#29 Eugene (lim0n) 1094 (67666) 2019-08-07 12:50:27
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Snow White and the seven dwarfs

[meier-05] - 251 users already solved this challenge, 61 are working on it.
 
 
 

The seven dwarfs are missing. Snow White however finds a file, which contains useful information steganographically hidden. Help her to find the dwarfs.
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: 2013-04-20 11:23
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#251) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 200 (177433) 2013-04-20 13:44:29
J. M. (jomandi) 200 (113270) 2013-04-20 13:54:57
H. Lautenschlager (helmi) 200 (32947) 2013-04-20 13:56:40
Viktor (Veselovský) 200 (155163) 2013-04-20 14:49:10
#5 Armin Krauss (argh) 200 (188214) 2013-04-20 15:45:06
#6 Dayana Behrens (Dayana) 150 (2144) 2013-04-21 13:30:16
#7 Bart den Hartog (Bart13) 150 (144081) 2013-04-21 23:05:32
#8 Bernhard Gruber (bgr) 150 (22889) 2013-04-22 09:36:47
#9 Roland Jansen (roland) 133 (17607) 2013-04-22 11:27:14
#10 Luigi Tomelli (archstanton) 133 (108345) 2013-04-22 11:39:56
#11 Lukas (Mornielome) 133 (133) 2013-04-22 14:55:05
#12 swarmspider (swarmspider) 133 (4528) 2013-04-22 15:04:20
#13 Meine Registrierung (TryC3) 133 (6045) 2013-04-22 15:34:44
#14 Step (l0rdp3rth) 133 (836) 2013-04-22 15:55:24
#15 Thomas Pohl (thexmojo) 133 (734) 2013-04-22 21:23:28
#16 C.G. (XORro) 133 (235) 2013-04-22 21:49:15
#17 E.T (Ertheb) 133 (81809) 2013-04-22 22:01:46
#18 Thomas Lambert (lambert) 133 (35237) 2013-04-23 04:31:10
#19 CryThis (CryThis) 133 (233) 2013-04-23 08:43:33
#20 Nemo (nemo) 133 (235) 2013-04-23 11:21:48
#21 Steffen (mc_iq) 125 (1513) 2013-04-23 14:50:15
#22 Dusan (xxdradus) 125 (40236) 2013-04-23 16:22:34
#23 Uli (Koboldus) 120 (120) 2013-04-24 11:55:33
#24 Philipp (Kohai) 120 (2208) 2013-04-24 13:55:37
#25 Robert (stadtschamane) 120 (220) 2013-04-24 14:11:17
#26 Tobias (Thaddel) 120 (220) 2013-04-24 18:47:21
#27 Hans Peter (hanspeter) 120 (52256) 2013-04-24 21:25:56
#28 KW (qwer*) 120 (13963) 2013-04-24 21:30:23
#29 Nimsoo Sun (Nimsoosun) 120 (2518) 2013-04-24 22:09:53
#30 George (Theofanidis) 120 (113380) 2013-04-24 22:39:30
#31 fancan Teik (Fancan_teik) 120 (120) 2013-04-24 22:50:31
#32 RPH (derichard) 120 (27044) 2013-04-24 23:02:10
#33 Snake (snk) 120 (86245) 2013-04-25 09:57:28
#34 Hansemann (hansemak) 117 (3522) 2013-04-25 11:45:40
#35 Stepan (m1sterx) 117 (19165) 2013-04-25 12:41:46
#36 Velko Nikolov (staafl) 117 (13467) 2013-04-25 13:34:19
#37 Petra (humppapenguin) 117 (3872) 2013-04-25 18:35:29
#38 Fuge (fugitech) 117 (917) 2013-04-25 19:07:29
#39 Muhammad Ismail (polonium) 117 (317) 2013-04-25 22:29:18
#40 Christian (chrikru) 117 (520) 2013-04-26 08:42:03
#41 Michael Möller (michaelm) 114 (175129) 2013-04-26 16:02:06
#42 Kyle Reed (kallanreed) 114 (216) 2013-04-26 21:49:34
#43 Ramon Rojas (superme) 111 (3409) 2013-04-28 22:38:42
#44 Silvia (Sina) 110 (512) 2013-04-29 18:57:48
#45 Martin Steinborn (Maldin) 110 (512) 2013-04-29 19:35:06
#46 Y (Yoshio) 110 (2194) 2013-04-29 19:38:18
#47 Martin (Metin) 110 (212) 2013-04-29 22:38:48
#48 Julia Werdelmann (jw) 108 (10407) 2013-05-01 22:20:54
#49 Jörg Schwarzwälder (secuso) 107 (2125) 2013-05-05 00:55:24
#50 Thomas Gonda (TomG) 105 (36291) 2013-05-09 14:32:43
#51 Ulrich Dorobeck (Papageno) 104 (3827) 2013-05-13 22:04:10
#52 Alexander Buerger (a.buerger) 104 (2332) 2013-05-16 09:43:10
#53 Georgius Stolte (HazmatsFear) 104 (15671) 2013-05-16 21:08:07
#54 A. S. (er1709) 104 (1608) 2013-05-17 01:41:32
#55 mk (bilbobeutlin) 104 (12340) 2013-05-17 20:59:40
#56 Hank (hanky) 103 (22959) 2013-05-20 02:31:55
#57 Felix (Flix) 103 (13712) 2013-05-24 22:59:52
#58 Michel Van Caneghem (vancan) 103 (49719) 2013-05-27 09:40:02
#59 Patrick Renz (tarantulla) 103 (2027) 2013-05-28 12:24:57
#60 Eugene (ZhekaS) 103 (6037) 2013-05-28 18:23:05
#61 Kasia (TheKid) 103 (1103) 2013-05-29 22:24:37
#62 Anggia (Vuleedazula) 102 (1608) 2013-05-30 15:49:25
#63 Sven (z3ro) 102 (102) 2013-05-30 16:47:05
#64 H. X. R. (herp) 102 (602) 2013-06-01 00:29:27
#65 Hans Joachim Girulat (joregi) 102 (36278) 2013-06-02 15:31:04
#66 caique (kragor) 102 (102) 2013-06-02 18:54:50
#67 Gerhard (Ghossi) 102 (203) 2013-06-02 22:36:35
#68 Martin Brehmer (ZaHaDum1984) 102 (102) 2013-06-09 18:01:21
#69 Stephan Krätzschmar (cyvr1) 102 (503) 2013-06-10 12:08:59
#70 Mikhail (Miko) 102 (604) 2013-06-11 05:39:42
#71 Vlatiha Romanova (Vlatiha) 102 (10323) 2013-06-14 13:42:54
#72 Gergely Simon (george314) 102 (16555) 2013-06-17 22:32:17
#73 SG (Algorab) 102 (602) 2013-06-18 18:30:46
#74 Steve (Samacian) 101 (23804) 2013-06-26 04:52:27
#75 Nathalie (Nathalie) 101 (1773) 2013-06-28 14:44:19
#76 Bernd (BRK) 101 (2275) 2013-06-30 18:52:43
#77 ABo (LordPresident) 101 (409) 2013-07-03 14:58:00
#78 Neu2o (Neu2o) 101 (1326) 2013-07-05 04:45:37
#79 zahir mohsen moradi (ariobarzan) 101 (99757) 2013-07-06 16:42:36
#80 Sascha (DoctorHell) 101 (1305) 2013-07-09 14:06:05
#81 jacobian1729 (jacobian1729) 101 (5584) 2013-07-09 19:42:05
#82 Gronas (gronas) 101 (2667) 2013-07-14 13:16:06
#83 Almut (problelmo) 101 (45992) 2013-07-15 20:36:32
#84 David (En0pH1) 101 (702) 2013-07-19 01:42:09
#85 Jan (Arges) 101 (201) 2013-07-19 17:38:46
#86 Paweł Kaliniak (pawelkaliniak) 101 (101) 2013-07-19 20:35:05
#87 Philipp Hammer-Pohlau (phase2) 101 (17981) 2013-07-22 11:53:05
#88 Forrest Gump (Polyphem) 101 (38763) 2013-07-24 23:13:12
#89 Kai (Hümmlingtaskforce) 101 (101) 2013-07-25 17:45:15
#90 Ralf Stephan (rwst) 101 (25229) 2013-07-26 10:25:29
#91 Fackelmann (fackelma) 101 (201) 2013-07-26 18:43:49
#92 Em Doulgerakis (Greko) 101 (131437) 2013-07-29 14:59:15
#93 Michael S (Scherbius) 101 (403) 2013-07-29 20:38:24
#94 Jens Hansen (Tar-Minyatur) 101 (101) 2013-07-30 21:31:52
#95 Jörn Cholewa (Bombadil) 101 (401) 2013-08-01 13:36:33
#96 Ricardo Oliveira Souza (ricardooliveirasouza) 101 (1101) 2013-08-01 18:48:16
#97 Alex Tyuluman (AlexTyu) 101 (101) 2013-08-02 22:57:02
#98 Bernd (cyberburger) 101 (101) 2013-08-05 15:52:35
#99 Rolf (marmotte407) 101 (101) 2013-08-06 20:40:18
#100 drunkeNNN (drunkeNNN) 101 (301) 2013-08-08 22:18:12
#101 Andreas H. (Cyrpius) 101 (2666) 2013-08-14 20:55:39
#102 Victor Tobies (Donald) 101 (2567) 2013-08-16 14:59:08
#103 masam (jimboo) 101 (18687) 2013-08-16 23:08:31
#104 cyclops (cyclops) 101 (2549) 2013-08-20 17:24:31
#105 Gianluca Andriolo (Andriolo) 101 (3900) 2013-08-22 15:13:32
#106 J (fireball9199) 101 (101) 2013-08-28 17:55:58
#107 Andreas Wolff (timberwolff) 101 (1340) 2013-09-06 20:02:03
#108 Sebastian Slupina (Grandwizard) 101 (10866) 2013-09-09 09:46:06
#109 Alexander (cruachan) 101 (16051) 2013-09-10 01:21:59
#110 Benedikt M. (bm91) 101 (4112) 2013-09-14 17:52:47
#111 Anton (IILaryII) 101 (409) 2013-09-19 20:28:33
#112 Paul (pgilbert) 101 (657) 2013-10-18 02:31:14
#113 Boris (Kaasu) 101 (16566) 2013-10-18 18:16:43
#114 Jay Kay (Merty) 101 (3726) 2013-10-23 17:30:17
#115 Jim Gillogly (Scryer) 100 (21260) 2013-12-03 05:03:52
#116 teifi (teifi) 100 (2251) 2013-12-15 10:18:32
#117 Alain (Integral) 100 (207924) 2013-12-15 12:10:48
#118 bla (bla) 100 (2750) 2013-12-19 01:01:38
#119 Nir (nirarbel) 100 (500) 2013-12-31 06:16:44
#120 Csaba Fitzl (csaby) 100 (6696) 2013-12-31 13:33:33
#121 Joost (Joost) 100 (2653) 2014-01-02 15:36:35
#122 Kim H. S. (tenchijin) 100 (25468) 2014-01-02 21:39:47
#123 Pavel (haw) 100 (22728) 2014-01-05 11:41:06
#124 James Booth (jimbojetset35) 100 (2547) 2014-01-14 00:02:43
#125 Flo (0knowledge) 100 (902) 2014-02-02 12:59:05
#126 Marcel (bene1512) 100 (20896) 2014-02-04 22:33:24
#127 Marco (mawo25) 100 (2445) 2014-02-05 15:13:28
#128 Flo (sealth) 100 (13472) 2014-02-08 18:43:48
#129 Sascha (The Hoddich) 100 (4350) 2014-03-03 10:49:09
#130 Arno (acerberus) 100 (300) 2014-03-16 18:22:09
#131 Karl Schutt (günter) 100 (41550) 2014-03-29 18:01:17
#132 Simone (Momo) 100 (5478) 2014-04-11 11:30:48
#133 Tina (BTina) 100 (1500) 2014-06-01 02:59:08
#134 Joe (IlmJoe) 100 (2938) 2014-06-18 13:28:31
#135 julius gaius (julius) 100 (25581) 2014-07-20 11:53:00
#136 Hughes (hughes) 100 (7925) 2014-07-22 15:50:50
#137 Robert (rm) 100 (56475) 2014-07-31 22:13:53
#138 artmagic (artmagic) 100 (6298) 2014-08-18 21:27:19
#139 Lane Williams (planetlane) 100 (23948) 2014-08-19 18:36:12
#140 Tiloan (Tiloan) 100 (3840) 2014-08-30 21:22:28
#141 Andreas Frerichs (Ossili) 100 (33266) 2014-09-01 19:42:22
#142 Jeetsagar (jeetsagar) 100 (2429) 2014-10-04 13:06:18
#143 Señor Saturn (senorsaturn) 100 (3344) 2014-10-22 01:31:10
#144 Francisco Moraes (fmoraes) 100 (90044) 2014-10-30 18:51:25
#145 Tim Fink (Magellan) 100 (4876) 2014-11-04 10:49:48
#146 HolgerK (HolgerK) 100 (25776) 2014-11-26 19:15:32
#147 Michael Jeffrey (empjay) 100 (3004) 2014-12-05 20:55:41
#148 Annie (Annanasss) 100 (6813) 2014-12-17 16:43:55
#149 Kai Ludwig (TalentRaspel) 100 (15704) 2015-01-05 11:43:09
#150 Claude Vaillancourt (Cl3v3r) 100 (38351) 2015-01-05 21:02:20
#151 Kris (K$$$) 100 (3732) 2015-01-21 23:13:31
#152 j.h. (haegarq) 100 (15252) 2015-01-23 15:25:13
#153 Tom Tox (tox) 100 (17708) 2015-02-12 23:46:02
#154 mirth23 (mirth23) 100 (7050) 2015-02-17 07:10:54
#155 Zonkism (zonkism) 100 (4004) 2015-02-18 01:02:07
#156 micaman (micaman) 100 (4634) 2015-02-18 01:31:58
#157 Shoukat (e195633) 100 (10617) 2015-02-18 14:40:19
#158 Rainer Zufall (kiekuk) 100 (56786) 2015-02-22 20:55:53
#159 Konstantin Golovan (SoulShaker) 100 (14091) 2015-02-28 18:13:30
#160 Philippe ALLARD (Flobert) 100 (4035) 2015-03-11 21:11:01
#161 chris_3stones (3stones) 100 (37759) 2015-04-05 11:53:32
#162 Brian Kieslich (briank) 100 (6733) 2015-04-07 15:57:21
#163 S (Dingo_the_BB) 100 (6534) 2015-04-09 07:57:00
#164 Andi (MTAndi) 100 (301) 2015-05-07 11:52:27
#165 hannes kirchner (NassZen) 100 (400) 2015-07-01 19:26:28
#166 Mark van Heeswijk (markvh) 100 (2600) 2015-07-06 15:45:05
#167 Jens Hansen (bonnaix) 100 (3511) 2015-07-06 16:51:11
#168 Erik (Erox) 100 (26141) 2015-07-15 00:21:06
#169 Mehmet Adali (mehmetadali) 100 (2620) 2015-07-19 09:54:50
#170 Julia Bernotat (El Greco ) 100 (81129) 2015-08-03 22:48:57
#171 Tradecraft (Tradecraft) 100 (5540) 2015-08-04 22:10:32
#172 Isabella (Isa) 100 (4235) 2015-08-10 17:42:08
#173 partamier (yann) 100 (5635) 2015-08-20 13:38:23
#174 n3v4nc4 (n3v4nc4) 100 (800) 2015-08-21 21:57:39
#175 Sirius (Leznar) 100 (4552) 2015-09-08 17:49:54
#176 Joris Diesvelt (SylverFox) 100 (4019) 2015-09-09 19:24:46
#177 Joerg G. (SnifferMaster) 100 (18154) 2015-09-18 05:27:48
#178 hamad alghanim (dreamer_soul) 100 (1316) 2015-09-25 14:45:16
#179 Fawaz (fawaz30) 100 (1316) 2015-09-26 19:28:01
#180 J-L Morel (Rossignol) 100 (29425) 2015-10-04 16:40:58
#181 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-07 20:54:14
#182 S (Zyphe) 100 (10461) 2015-12-01 21:49:58
#183 Spillner (Error404) 100 (901) 2015-12-05 00:06:24
#184 Jan (xray) 100 (904) 2015-12-09 13:44:08
#185 Jeremy Juenger (The_Shocker_12) 100 (3720) 2015-12-10 04:03:34
#186 Corneli Keim (cryptina) 100 (703) 2015-12-19 21:07:41
#187 Imam Uasa (Merricx) 100 (9188) 2015-12-29 14:13:34
#188 Casaubon (cfreuden) 100 (8515) 2016-01-13 01:21:02
#189 D (devilchn) 100 (11142) 2016-02-09 22:25:24
#190 WF (f077) 100 (6874) 2016-02-19 19:57:15
#191 Marco Manfredi (mkk9901) 100 (17686) 2016-02-27 01:34:29
#192 Martina (BonoV) 100 (3017) 2016-02-29 11:27:11
#193 Peter (Garnet) 100 (14234) 2016-03-08 12:17:17
#194 Marc (rcll0891) 100 (24004) 2016-03-13 13:23:22
#195 Ines (bufo01) 100 (4515) 2016-03-13 17:59:41
#196 Dominik M. (Sgt. Pepper) 100 (97919) 2016-03-18 18:52:41
#197 Javantea (Javantea) 100 (40816) 2016-06-13 21:49:59
#198 Ben (Seraph) 100 (2009) 2016-06-20 22:20:41
#199 Daniel (Ribeiro) 100 (1398) 2016-08-19 17:33:21
#200 dnl (rbr) 100 (1398) 2016-08-23 19:06:59
#201 Luciano Ignaczak (CryptoClass) 100 (3505) 2016-08-26 22:03:37
#202 Norbert Biermann (Norbert) 100 (45031) 2016-09-18 19:22:23
#203 John Felix (johnf) 100 (3705) 2016-09-27 14:45:46
#204 Nicolas (nicosPavlov) 100 (151166) 2016-09-29 02:39:32
#205 Alain Collignon (vexilla72) 100 (96903) 2016-10-24 17:59:23
#206 Hajoe (Tintin-Muc) 100 (6923) 2016-10-25 15:11:56
#207 Tristan1473 (Tristan1473) 100 (18914) 2016-11-06 15:03:55
#208 Simon Jakob (simon.jakob) 100 (18714) 2016-11-19 23:25:05
#209 Julian (Lemmynator) 100 (18353) 2016-11-20 16:03:48
#210 JoGo (JoGo) 100 (11686) 2016-11-30 17:27:59
#211 Michael (FoM) 100 (38953) 2016-12-03 09:20:16
#212 Nofre Tete (noffi) 100 (21921) 2016-12-23 20:44:55
#213 Mihail (plexor) 100 (16827) 2017-02-25 10:07:17
#214 Luservet (luservet) 100 (400) 2017-03-01 10:58:12
#215 Mir Dim (mir0soft) 100 (72404) 2017-03-12 18:21:36
#216 chris (c2) 100 (51973) 2017-03-17 14:42:42
#217 Daniel Walder (ibex) 100 (14672) 2017-04-10 22:49:35
#218 Shishio (ShiShiO) 100 (100) 2017-05-12 17:30:16
#219 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-09 22:13:53
#220 Tarek (mastarux) 100 (3095) 2017-07-17 18:44:34
#221 Moomin (Mushmom) 100 (7674) 2017-07-18 13:04:20
#222 Akonia (Akonia12) 100 (12153) 2017-07-20 20:04:20
#223 Immo Weber (MandelToast) 100 (10061) 2017-08-13 21:06:31
#224 Dennis Busch (0xDB) 100 (3693) 2017-09-24 20:15:42
#225 nimroth (nimroth cynthor) 100 (6021) 2017-11-21 19:25:23
#226 Julian (Ju1703) 100 (4190) 2018-02-27 10:04:34
#227 Steve Vaillancourt (stvai2) 100 (15041) 2018-04-26 03:20:24
#228 Eric (ExAstris) 100 (27090) 2018-05-24 22:19:55
#229 Benjamin (200611736) 100 (10186) 2018-06-07 21:13:12
#230 Fedilia (Fedilia) 100 (4489) 2018-06-09 18:08:02
#231 Random Dude (rnd) 100 (97213) 2018-07-08 20:28:47
#232 sarah b (silva) 100 (26264) 2018-08-17 13:28:14
#233 Maria (julesjulchen) 100 (3019) 2018-09-02 16:27:42
#234 Thalhammer (Thalhammer) 100 (3784) 2018-10-17 16:02:41
#235 Mart (Mart) 100 (3584) 2018-10-26 23:22:33
#236 phoenix1204 (phoenix1204) 100 (1800) 2018-10-29 09:42:14
#237 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-06 19:08:58
#238 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-23 05:06:15
#239 Lia (Lia) 100 (6855) 2019-03-10 18:45:55
#240 Mike (RogueRamblers) 100 (32275) 2019-03-14 15:37:23
#241 Klaus (kumaus) 100 (21415) 2019-04-03 14:43:12
#242 Christian (MarquisDeSud) 100 (7848) 2019-04-11 12:52:36
#243 Jeff (Fountain) 100 (8788) 2019-05-26 02:05:19
#244 Stephan (Stephje1978) 100 (26961) 2019-06-27 20:40:01
#245 mighty_maharaja (mighty_maharaja) 100 (2592) 2019-06-29 15:56:02
#246 gerdw (gerdw) 100 (30489) 2019-07-11 18:49:02
#247 ajg (ludimus) 100 (12114) 2019-07-21 14:07:26
#248 Dr. Peter Uelkes (RandyWaterhouse) 100 (9990) 2019-07-30 07:20:20
#249 david (sexton) 100 (2801) 2019-08-04 11:14:04
#250 Eugene (lim0n) 100 (67666) 2019-09-12 10:18:19
#251 h4rdl0ck (h4rdl0ck) 100 (4168) 2019-09-17 20:19:01
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Typex — Part 2

[chang-02] - 18 users already solved this challenge, 1 is working on it.
 
 
 

A new and unknown rotor has been added to the Typex machine. Use a known-plaintext attack to determine the wiring of the new rotor.
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Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-04-03 14:40
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#18) Achieved points (Global score) y-m-d - h:m:s

J. M. (jomandi) 2000 (113270) 2013-04-04 00:08:52
Kurt Gebauer (Yokozuna) 2000 (177433) 2013-04-04 02:36:42
Seth Kintigh (DarkFibre) 2000 (79471) 2013-04-04 03:51:27
Luigi Tomelli (archstanton) 1725 (108345) 2013-04-05 21:50:01
#5 Armin Krauss (argh) 1576 (188214) 2013-04-09 13:57:52
#6 George (Theofanidis) 1362 (113380) 2013-04-27 11:56:54
#7 zahir mohsen moradi (ariobarzan) 1217 (99757) 2013-08-02 14:56:11
#8 Bart den Hartog (Bart13) 1193 (144081) 2013-10-02 00:16:48
#9 Forrest Gump (Polyphem) 1192 (38763) 2013-10-04 00:42:54
#10 E.T (Ertheb) 1175 (81809) 2013-12-12 19:08:32
#11 Alain (Integral) 1169 (207924) 2014-01-12 10:21:33
#12 George Lasry (george4096) 1155 (302230) 2014-04-26 11:08:03
#13 Viktor (Veselovský) 1148 (155163) 2014-07-02 22:12:24
#14 Claude Vaillancourt (Cl3v3r) 1122 (38351) 2015-09-24 20:42:56
#15 S Combes (jerva) 1121 (99132) 2015-10-11 14:31:53
#16 Nicolas (nicosPavlov) 1109 (151166) 2016-11-20 10:59:40
#17 D3d4lu5 (D3d4lu5) 1104 (297709) 2017-08-25 06:03:13
#18 Alain Collignon (vexilla72) 1098 (96903) 2018-08-23 12:17:41
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Cascading Encryption — Part 3/3

[wacker-07] - 11 users already solved this challenge.
 
 
 

Use the hints from the first and second part of this challenge to decrypt this message that has been encrypted using an ENIGMA.
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Click here to download the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2013-03-29 12:52
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#11) Achieved points (Global score) y-m-d - h:m:s

Luigi Tomelli (archstanton) 1485 (108345) 2013-04-08 11:32:41
J. M. (jomandi) 1353 (113270) 2013-04-23 21:11:38
George Lasry (george4096) 1190 (302230) 2013-10-07 04:33:16
Em Doulgerakis (Greko) 1186 (131437) 2013-10-19 17:49:39
#5 Kurt Gebauer (Yokozuna) 1183 (177433) 2013-11-01 09:31:48
#6 Bart den Hartog (Bart13) 1150 (144081) 2014-06-02 02:03:23
#7 Viktor (Veselovský) 1148 (155163) 2014-06-22 22:08:13
#8 Alain (Integral) 1136 (207924) 2014-11-20 15:44:40
#9 Armin Krauss (argh) 1125 (188214) 2015-06-17 12:20:34
#10 Szabó Zoltán (szabo.z87) 1116 (55604) 2016-03-01 15:51:31
#11 D3d4lu5 (D3d4lu5) 1095 (297709) 2019-03-10 15:57:03
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   +++    [15:17 - 14.11.2019] phihhim solved the Level I challenge 'Affine Codes / Modulo Arithmetic with N / Extended Euclid'    +++    [09:00 - 14.11.2019] SirAbacus solved the Level I challenge 'Number Sequence — Part 3'    +++    [06:47 - 14.11.2019] Miles solved the Level I challenge '¿No Hablas Español? No problemo!'    +++    [05:26 - 14.11.2019] Akuro solved the Level II challenge 'Letter to the Templars — Part 3'    +++    [05:10 - 14.11.2019] Akuro solved the Level I challenge 'Letter to the Templars — Part 2'    +++