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.

AES ECB Wrong Encoding

[miro-01] - 14 users already solved this challenge.
 
 
 

Do you believe that AES is easy to break because of a wrong encoding? Try it yourself...
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: 2017-12-16 19:21
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#14) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 2000 (155163) 2017-12-17 18:10:22
Snake (snk) 1824 (83889) 2017-12-17 21:48:12
Armin Krauss (argh) 1824 (188214) 2017-12-17 23:34:09
Kurt Gebauer (Yokozuna) 1824 (177433) 2017-12-18 13:16:26
#5 Kasia (kasia-tutej) 1613 (53366) 2017-12-21 16:40:57
#6 D3d4lu5 (D3d4lu5) 1523 (297709) 2017-12-24 04:30:18
#7 Dominik M. (Sgt. Pepper) 1523 (97919) 2017-12-24 17:46:24
#8 H. Lautenschlager (helmi) 1423 (32947) 2017-12-31 18:15:33
#9 a (agigi) 1192 (1192) 2018-06-18 14:46:05
#10 Oprea Bogdan (bogdan.oprea) 1192 (1192) 2018-06-18 14:48:57
#11 Teodoru catalin Andrei (teodoru) 1192 (5698) 2018-06-20 15:55:25
#12 Alain (Integral) 1184 (207924) 2018-07-19 09:43:49
#13 Em Doulgerakis (Greko) 1180 (124033) 2018-08-03 11:01:50
#14 Eugene (lim0n) 1143 (54954) 2019-05-12 06:23:52
You must be logged in to solve the challenge


Advent-Challenge — Part 2

[rotthaler-04] - 32 users already solved this challenge, 2 are working on it.
 
 
 

Mike would like to belong to the cryptographers. Can you help him to find out their meeting point at the Christmas market?
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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: 2017-12-16 19:20
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#32) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (177433) 2017-12-17 00:20:59
Dominik M. (Sgt. Pepper) 2000 (97919) 2017-12-17 06:30:45
Alain Collignon (vexilla72) 2000 (90800) 2017-12-17 11:20:39
Viktor (Veselovský) 2000 (155163) 2017-12-17 12:30:11
#5 Snake (snk) 2000 (83889) 2017-12-17 13:08:04
#6 HolgerK (HolgerK) 1824 (25776) 2017-12-17 21:40:33
#7 Armin Krauss (argh) 1824 (188214) 2017-12-17 23:35:23
#8 H. Lautenschlager (helmi) 1824 (32947) 2017-12-18 16:07:50
#9 Em Doulgerakis (Greko) 1824 (124033) 2017-12-18 16:55:03
#10 Rainer Zufall (kiekuk) 1725 (56786) 2017-12-19 18:36:20
#11 Mir Dim (mir0soft) 1660 (72404) 2017-12-20 14:38:38
#12 J-L Morel (Rossignol) 1660 (29425) 2017-12-20 15:48:19
#13 Kasia (kasia-tutej) 1613 (53366) 2017-12-21 14:27:23
#14 Martin (martinbucher) 1613 (27363) 2017-12-21 16:34:55
#15 D3d4lu5 (D3d4lu5) 1576 (297709) 2017-12-22 14:54:56
#16 chris_3stones (3stones) 1469 (37759) 2017-12-26 20:14:01
#17 George (Theofanidis) 1469 (112184) 2017-12-26 20:17:25
#18 T (Wagner) 1433 (16988) 2017-12-30 08:51:23
#19 Nicolas (nicosPavlov) 1414 (151166) 2018-01-01 12:24:40
#20 E.T (Ertheb) 1406 (81809) 2018-01-02 18:16:51
#21 j.h. (haegarq) 1357 (15252) 2018-01-10 11:36:25
#22 Tristan1473 (Tristan1473) 1260 (18914) 2018-02-22 09:28:54
#23 Thomas Gonda (TomG) 1236 (36291) 2018-03-19 14:50:31
#24 Szabó Zoltán (szabo.z87) 1222 (55604) 2018-04-09 12:22:19
#25 Silvia Kortmann (mikinsget) 1203 (10104) 2018-05-17 01:25:36
#26 Hans Joachim Girulat (joregi) 1177 (36278) 2018-08-16 23:28:02
#27 Random Dude (rnd) 1168 (90929) 2018-10-04 15:41:41
#28 Hans Peter (hanspeter) 1162 (52256) 2018-11-08 18:57:23
#29 Luigi Tomelli (archstanton) 1157 (108345) 2018-12-17 18:06:55
#30 zuben c3 (zuben-c3) 1155 (24853) 2019-01-02 12:17:53
#31 Eugene (lim0n) 1144 (54954) 2019-04-20 21:06:17
#32 Bart den Hartog (Bart13) 1138 (144081) 2019-07-17 02:45:34
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Advent-Challenge — Part 1

[rotthaler-03] - 292 users already solved this challenge, 13 are working on it.
 
 
 

Little Anna has forgotten how to decrypt her ciphertext. Can you come up to her pre-Christmas wish?
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: 2017-12-08 19:24
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#292) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 200 (177433) 2017-12-08 20:26:00
Michael Möller (michaelm) 200 (175129) 2017-12-08 20:27:32
HolgerK (HolgerK) 200 (25776) 2017-12-08 20:51:53
H. Lautenschlager (helmi) 200 (32947) 2017-12-08 21:06:49
#5 Qiu (Qiu) 200 (2099) 2017-12-08 22:08:03
#6 Viktor (Veselovský) 200 (155163) 2017-12-08 22:36:15
#7 Robert (rm) 200 (56475) 2017-12-09 00:52:38
#8 D3d4lu5 (D3d4lu5) 200 (297709) 2017-12-09 03:01:45
#9 Qinncade (Qinncade) 150 (2610) 2017-12-09 23:15:33
#10 Tim Fink (Magellan) 150 (4876) 2017-12-10 07:27:05
#11 Alain Collignon (vexilla72) 150 (90800) 2017-12-10 09:25:22
#12 Snake (snk) 150 (83889) 2017-12-10 14:33:18
#13 Armin Krauss (argh) 150 (188214) 2017-12-10 16:51:04
#14 Bernhard Gruber (bgr) 133 (22889) 2017-12-11 09:51:50
#15 Georgius Stolte (HazmatsFear) 133 (15671) 2017-12-11 11:10:16
#16 Andreas Frerichs (Ossili) 133 (33266) 2017-12-11 14:07:20
#17 Kai Fischell (MrFlector) 133 (1433) 2017-12-11 14:39:01
#18 Rainer Zufall (kiekuk) 133 (56786) 2017-12-11 14:50:55
#19 Em Doulgerakis (Greko) 133 (124033) 2017-12-11 15:18:52
#20 Dominik M. (Sgt. Pepper) 133 (97919) 2017-12-11 16:23:39
#21 Marc (rcll0891) 133 (24004) 2017-12-11 16:29:47
#22 Wieland (wisch) 133 (6633) 2017-12-11 17:09:24
#23 satz (rbsatish) 125 (125) 2017-12-12 10:06:58
#24 Bart den Hartog (Bart13) 117 (144081) 2017-12-14 19:02:22
#25 E.T (Ertheb) 114 (81809) 2017-12-15 16:27:23
#26 Mir Dim (mir0soft) 113 (72404) 2017-12-16 00:33:24
#27 Ronja (Ronja) 113 (3715) 2017-12-16 11:58:40
#28 Fabian (XP-72) 111 (3707) 2017-12-17 19:19:38
#29 Lane Williams (planetlane) 110 (23948) 2017-12-17 22:27:26
#30 J-L Morel (Rossignol) 109 (29425) 2017-12-19 11:02:25
#31 Holger (holger) 109 (812) 2017-12-19 11:20:07
#32 Anibal Kürekci (ak187) 109 (1076) 2017-12-19 12:42:02
#33 Martin (martinbucher) 108 (27363) 2017-12-20 10:10:00
#34 John Reade (AconitumFerox) 108 (108) 2017-12-20 14:49:45
#35 KW (qwer*) 107 (13963) 2017-12-21 19:46:59
#36 George (Theofanidis) 107 (112184) 2017-12-22 18:26:58
#37 Hanspeter (hapela) 107 (1007) 2017-12-23 18:12:33
#38 Dusan Djuric (flapjack) 106 (2104) 2017-12-23 23:13:46
#39 j.h. (haegarq) 106 (15252) 2017-12-26 13:20:04
#40 chris_3stones (3stones) 105 (37759) 2017-12-26 20:15:55
#41 Gu Drun (Shirkano) 105 (105) 2017-12-28 12:41:35
#42 T (Wagner) 105 (16988) 2017-12-29 08:28:22
#43 Urs Gysler (Sansibar) 105 (3269) 2017-12-30 19:17:14
#44 Alex (Faustino50) 104 (104) 2017-12-31 01:55:44
#45 Maximilian (Xian) 104 (604) 2017-12-31 11:20:06
#46 Samuel (Samusicus) 104 (2203) 2018-01-03 15:09:12
#47 Carsten Caliebe (CAKA100) 104 (306) 2018-01-03 17:31:45
#48 Gideon (gidl0r) 103 (103) 2018-01-06 00:56:48
#49 Fr3d (Logarn) 103 (103) 2018-01-06 10:26:17
#50 Lukas Leuenberger (LukiLeu) 103 (103) 2018-01-06 18:31:45
#51 Kevin (Kroev) 103 (103) 2018-01-09 00:26:18
#52 swarmspider (swarmspider) 103 (4528) 2018-01-11 09:50:24
#53 Pen (justtesting) 103 (1697) 2018-01-12 13:31:47
#54 Elias (EliasTerm) 103 (103) 2018-01-13 02:40:06
#55 Nicolas (nicosPavlov) 103 (151166) 2018-01-13 11:16:36
#56 Nofre Tete (noffi) 103 (21921) 2018-01-13 13:07:29
#57 George Lasry (george4096) 103 (302230) 2018-01-13 18:40:16
#58 Ines (bufo01) 103 (4515) 2018-01-14 15:35:10
#59 The Brain 83 (thebrain983) 103 (1895) 2018-01-14 22:57:43
#60 Goldfingerz (goldfingerz) 103 (603) 2018-01-15 20:00:14
#61 Big Guy (bsn) 103 (103) 2018-01-16 16:52:26
#62 Christof Kleber (Loki) 103 (6051) 2018-01-17 11:00:13
#63 freak_out (freak_out) 103 (803) 2018-01-17 18:46:29
#64 Quasario (Quantum) 102 (102) 2018-01-19 16:00:40
#65 john doe (0x0abc) 102 (102) 2018-01-21 21:10:54
#66 lzn (lzn) 102 (102) 2018-01-22 22:57:31
#67 Mariana Pereira (Profmari) 102 (102) 2018-01-23 21:34:52
#68 S (Zyphe) 102 (10461) 2018-01-25 17:41:30
#69 Dusan (xxdradus) 102 (40236) 2018-01-26 12:41:12
#70 Andreas Zipse (zippi0815) 102 (3295) 2018-01-27 20:51:55
#71 Valentina Schunk (vale.schunk) 102 (102) 2018-01-29 17:16:10
#72 Jörg Schwarzwälder (secuso) 102 (2125) 2018-02-01 14:45:04
#73 Justin Huber (Kendyy) 102 (303) 2018-02-01 17:35:31
#74 Marc Schneider (schiiins) 102 (302) 2018-02-01 20:45:57
#75 tom (tomer766) 102 (102) 2018-02-03 10:44:26
#76 Sebastian Slupina (Grandwizard) 102 (10866) 2018-02-08 12:33:26
#77 Bastian (KorbenU19) 102 (102) 2018-02-11 10:54:47
#78 Klaus Kolba (Kolbone) 101 (3107) 2018-02-12 22:55:42
#79 Manu (manu87) 101 (2979) 2018-02-14 11:49:33
#80 Jack2k (Jack2k) 101 (101) 2018-02-18 17:20:13
#81 D (masterdot) 101 (201) 2018-02-19 14:18:49
#82 Ulrich Dorobeck (Papageno) 101 (3827) 2018-02-19 16:59:06
#83 Lena (littleYoung) 101 (101) 2018-02-20 16:34:49
#84 Tristan1473 (Tristan1473) 101 (18914) 2018-02-21 19:09:45
#85 khuslen (khuslen) 101 (201) 2018-02-24 16:43:08
#86 Danny Higgins (hamster147) 101 (34088) 2018-02-27 12:14:15
#87 Lennard (knubbelknospe) 101 (101) 2018-02-27 15:59:41
#88 David (Zajin) 101 (1598) 2018-02-27 19:48:52
#89 BENJAMIN (whatupyo02) 101 (201) 2018-02-27 21:48:00
#90 Kurkowski (ThomasK) 101 (2327) 2018-03-01 09:10:07
#91 JoGo (JoGo) 101 (11686) 2018-03-01 17:35:00
#92 Esura (Esura) 101 (101) 2018-03-01 18:22:21
#93 Tom Tox (tox) 101 (17708) 2018-03-03 21:56:58
#94 Bertold (bk) 101 (9673) 2018-03-04 14:09:16
#95 Nizar Rahman (rmn) 101 (201) 2018-03-05 15:34:24
#96 Julian (Lemmynator) 101 (17953) 2018-03-05 16:38:01
#97 Mau_Kappel (Mau_Kappel) 101 (4496) 2018-03-05 22:04:00
#98 ich (whoma) 101 (2299) 2018-03-06 18:51:29
#99 Doug (Cryptographer88) 101 (101) 2018-03-09 22:20:06
#100 Andreas Kammerer (daxq) 101 (201) 2018-03-10 11:00:09
#101 Tiago Rodeghiero (Tiago Rodeghiero) 101 (901) 2018-03-11 17:07:49
#102 Bruno Garcia (bgarcia) 101 (101) 2018-03-12 12:08:52
#103 Lucas (Beastwood) 101 (1999) 2018-03-13 14:17:20
#104 Selma Metin (seltuna) 101 (902) 2018-03-14 14:47:50
#105 Hector (ChevChelios) 101 (1599) 2018-03-15 23:12:18
#106 Thomas Gonda (TomG) 101 (36291) 2018-03-16 08:08:53
#107 Karl Schutt (günter) 101 (41550) 2018-03-17 05:57:20
#108 Fernando Sacilotto (Sacilotto) 101 (1292) 2018-03-17 22:07:33
#109 Norbert Biermann (Norbert) 101 (45031) 2018-03-20 12:48:31
#110 Kelsey Bailey (honeybteach) 101 (301) 2018-03-20 14:47:29
#111 Tom (quering) 101 (101) 2018-03-22 14:37:19
#112 Jrox (jrox) 101 (601) 2018-03-23 00:43:52
#113 Lucas de Vargas (vargas) 101 (301) 2018-03-24 01:31:39
#114 Ignacio (Moebiusar) 101 (7390) 2018-03-24 15:35:26
#115 Matheus (MrMath) 101 (301) 2018-03-24 22:40:06
#116 Thomas (Thomas4897) 101 (16596) 2018-03-28 18:18:24
#117 Luciano Ignaczak (ignaczak) 101 (3390) 2018-03-30 05:00:09
#118 Lara Riegelhofer (larrow_sparrow) 101 (2798) 2018-04-01 17:06:32
#119 resthiana (Pejuang_Surga) 101 (101) 2018-04-02 15:25:53
#120 Szabó Zoltán (szabo.z87) 101 (55604) 2018-04-03 11:23:08
#121 Martina (BonoV) 101 (3017) 2018-04-03 16:09:24
#122 v3ct0r (V3ct0r_) 101 (1291) 2018-04-05 14:28:48
#123 Nimsoo Sun (Nimsoosun) 101 (2518) 2018-04-05 21:38:13
#124 Benjamin (200611736) 101 (10186) 2018-04-07 23:12:26
#125 Alexander Hamling (hamling) 101 (201) 2018-04-08 10:55:43
#126 Steffen (stmue) 101 (2911) 2018-04-13 08:53:16
#127 Jatin (jatinluthra14) 101 (101) 2018-04-17 13:09:25
#128 Aracelly Tapia Torrealva (yllecara2018) 101 (101) 2018-04-26 02:31:18
#129 btALuie9jr9K (btALuie9jr9K) 101 (101) 2018-04-26 14:25:07
#130 Steve Vaillancourt (stvai2) 101 (15041) 2018-04-29 04:27:52
#131 Christian Inci (ch100) 101 (9253) 2018-05-02 00:50:16
#132 micaman (micaman) 101 (4634) 2018-05-11 16:31:41
#133 gabard (higgins29200) 101 (201) 2018-05-13 20:20:33
#134 Eric (ExAstris) 101 (26990) 2018-05-19 18:18:14
#135 drizak (drizak) 101 (101) 2018-05-29 00:52:42
#136 Ansehn (Rnabtd) 101 (203) 2018-05-31 20:04:57
#137 Lasome (Lasome) 101 (203) 2018-05-31 20:05:10
#138 Chirag Bapat (bapatchirag) 101 (201) 2018-06-03 10:12:15
#139 Plaxy Moreover (plaxy) 101 (101) 2018-06-04 12:03:33
#140 sarah b (silva) 101 (26264) 2018-06-05 09:22:46
#141 Kim H. S. (tenchijin) 101 (25468) 2018-06-07 22:31:00
#142 Fedilia (Fedilia) 101 (4489) 2018-06-08 17:37:38
#143 Yasir Javed (kianiyasir) 101 (101) 2018-06-09 03:48:56
#144 Christophe BORELLY (cb34) 101 (12358) 2018-06-09 20:05:09
#145 Leu (shiftleft) 101 (101) 2018-06-10 15:38:36
#146 Alexander Watson (awatson) 101 (2098) 2018-06-11 18:58:41
#147 Peter (Garnet) 101 (14234) 2018-06-14 20:30:51
#148 masam (jimboo) 101 (18687) 2018-06-14 23:40:04
#149 jack (jack_) 101 (303) 2018-06-18 16:20:33
#150 Max (Max_04) 101 (101) 2018-06-20 23:27:48
#151 Alain (Integral) 101 (207924) 2018-06-23 11:43:20
#152 Mosoiu (bobocea) 101 (101) 2018-06-23 11:44:08
#153 josh (talos) 101 (401) 2018-06-23 17:56:23
#154 Simon Kirchner (Twistios) 101 (3088) 2018-06-24 12:39:34
#155 Random Dude (rnd) 101 (90929) 2018-06-24 20:21:40
#156 Jan Knap (maddoxik) 100 (2458) 2018-06-28 22:14:41
#157 Raudah (Sandouk) 100 (301) 2018-06-30 01:13:27
#158 E41514019 (E41514019) 100 (2885) 2018-07-04 03:03:01
#159 wff1315 (wff) 100 (1789) 2018-07-04 03:05:03
#160 E41514015 (E41514015) 100 (2985) 2018-07-04 03:07:42
#161 E41514057 (E41514057) 100 (1796) 2018-07-04 03:40:49
#162 YKJ (E41514070) 100 (1896) 2018-07-04 04:04:09
#163 E41514023 (E41514023) 100 (3967) 2018-07-04 04:15:14
#164 E41514009 (E41514009) 100 (1000) 2018-07-04 04:21:49
#165 胡俊杰 (二十六) 100 (500) 2018-07-04 04:51:01
#166 V3 (kokoiuem18) 100 (200) 2018-07-04 11:20:54
#167 Michael (Fegoras) 100 (200) 2018-07-08 18:30:12
#168 adi (adi) 100 (100) 2018-07-11 21:23:16
#169 John (helpau) 100 (200) 2018-07-13 15:04:47
#170 João Vaz Martins (Awakening Star) 100 (4561) 2018-07-15 07:27:46
#171 Mihail (plexor) 100 (16827) 2018-07-16 22:09:02
#172 Matthias Frank (mfp) 100 (600) 2018-07-19 12:59:26
#173 Ionut (jonnyenglish) 100 (600) 2018-07-19 20:36:58
#174 Boris (netcom) 100 (100) 2018-07-22 14:50:07
#175 D (hakier) 100 (100) 2018-07-24 12:27:51
#176 Hans Joachim Girulat (joregi) 100 (36278) 2018-07-27 14:02:24
#177 Steve (Samacian) 100 (23804) 2018-08-02 06:25:31
#178 Verocs (koromvirag) 100 (433) 2018-08-02 11:18:42
#179 Hughes (hughes) 100 (7925) 2018-08-06 08:39:49
#180 Filippe Guerreiro Carvalho (filippegc) 100 (800) 2018-08-10 06:12:52
#181 Gustavo Sauer (gsauer) 100 (100) 2018-08-12 00:43:54
#182 Arrob (Arrob) 100 (100) 2018-08-14 12:23:10
#183 Laís Titoni (ltc) 100 (400) 2018-08-16 01:06:31
#184 Leonardo (leojaardim) 100 (2586) 2018-08-16 17:52:03
#185 Vlatiha Romanova (Vlatiha) 100 (10323) 2018-08-17 08:29:37
#186 Andrei Gasparovici (fullofvim) 100 (1861) 2018-08-17 20:07:20
#187 Lutz Sittinger (Kryptolutz) 100 (1802) 2018-08-19 10:52:35
#188 Mateus (Mateus de Freitas) 100 (400) 2018-08-20 01:39:04
#189 Ryan J Henry (Poxinomy) 100 (400) 2018-08-30 18:47:47
#190 HowarthStudios (HowarthStudios) 100 (3596) 2018-09-02 00:53:20
#191 Jennifer (jennipher) 100 (500) 2018-09-02 06:46:33
#192 A (2h873hcue) 100 (301) 2018-09-05 06:23:12
#193 Rahm (rmartins) 100 (1996) 2018-09-06 18:08:07
#194 Thiago Araujo Pereira (thiagoap) 100 (701) 2018-09-06 20:41:30
#195 med (med1) 100 (100) 2018-09-08 21:31:50
#196 Giulia (misteryaddicted) 100 (100) 2018-09-09 15:53:02
#197 Andy Wood (Woody) 100 (300) 2018-09-12 09:43:45
#198 Germano (German) 100 (400) 2018-09-12 18:51:00
#199 Imam Uasa (Merricx) 100 (9188) 2018-09-13 13:48:34
#200 Simon (¡Simon!) 100 (100) 2018-09-20 09:35:40
#201 Dodo (Dodo) 100 (2335) 2018-09-23 21:13:44
#202 Ralf (Infinitesimalpartikel) 100 (100) 2018-09-25 14:25:06
#203 Vinicius Moura (vpmoura) 100 (300) 2018-09-28 01:52:01
#204 Javantea (Javantea) 100 (40816) 2018-10-08 03:07:32
#205 Arbacle Clemens (arbacle) 100 (2502) 2018-10-12 22:11:32
#206 Koch (bbsldinflk) 100 (1389) 2018-10-15 23:29:51
#207 Mathijs Verbeek (QIXL) 100 (3096) 2018-10-17 17:46:04
#208 simone (xseris) 100 (8632) 2018-10-20 12:13:45
#209 Ne0Lux-C1Ph3r (Ne0Lux-C1Ph3r) 100 (800) 2018-10-27 04:53:47
#210 _o_ (_o_) 100 (1000) 2018-10-27 11:15:54
#211 clyto (clytorock) 100 (3195) 2018-11-03 14:55:17
#212 Cee Jae (vnm666) 100 (300) 2018-11-06 08:19:38
#213 Hans Peter (hanspeter) 100 (52256) 2018-11-08 18:41:35
#214 mglarragan (mglarragan) 100 (2091) 2018-11-11 10:08:57
#215 madness (madness) 100 (15407) 2018-11-15 02:40:25
#216 Sergej Schalew (CryptoSolver) 100 (600) 2018-11-20 20:34:33
#217 Joerg G. (SnifferMaster) 100 (18154) 2018-11-23 10:20:03
#218 Pierre Robier (tripleedged) 100 (5916) 2018-11-24 20:41:42
#219 steven (steven18) 100 (3091) 2018-11-25 14:04:45
#220 cipherbox (cipherbox) 100 (100) 2018-11-25 20:00:24
#221 Fernando karl (Karl) 100 (300) 2018-11-26 11:53:41
#222 Dario Moré (AUltraPotato) 100 (100) 2018-12-04 12:19:59
#223 t (Stark) 100 (100) 2018-12-04 20:32:37
#224 Clemens (16dombrowski) 100 (5136) 2018-12-15 14:18:57
#225 Luigi Tomelli (archstanton) 100 (108345) 2018-12-16 11:05:11
#226 Johnatan (RazorBest) 100 (1105) 2018-12-17 12:40:57
#227 Lorenzo (lorenzruskov) 100 (100) 2018-12-18 17:01:21
#228 Alex (Meiny) 100 (5136) 2018-12-18 20:58:21
#229 zuben c3 (zuben-c3) 100 (24853) 2018-12-20 16:06:41
#230 Elle (mermaidm0tel) 100 (200) 2018-12-21 11:59:09
#231 fm92 (fm92) 100 (601) 2018-12-24 12:28:02
#232 Bertolo (Bertolo) 100 (7167) 2018-12-24 19:38:08
#233 Dev Kalra (0__0) 100 (1490) 2018-12-25 11:21:24
#234 Brandon Z (laroof) 100 (200) 2018-12-27 00:06:20
#235 Ein-beispiel (Ein-beispiel) 100 (301) 2018-12-30 22:40:23
#236 Alan Turing (alan.turing) 100 (100) 2018-12-31 18:03:20
#237 jürgen (grmla) 100 (1794) 2019-01-04 10:02:51
#238 Michael (FoM) 100 (38953) 2019-01-06 00:42:08
#239 Kasia (kasia-tutej) 100 (53366) 2019-01-06 18:36:22
#240 Piotr (lesnik7) 100 (8171) 2019-01-11 13:38:38
#241 Lars Prepens (lprepens) 100 (200) 2019-01-31 07:11:33
#242 David (Fokus_1_U) 100 (200) 2019-01-31 19:08:05
#243 whitecowboy (whitecowboy) 100 (7446) 2019-02-05 18:20:52
#244 Kevin Weber (ThunderArmy) 100 (7783) 2019-02-11 16:47:13
#245 Felix Seifried (FS) 100 (500) 2019-02-20 14:45:11
#246 LoneWolf219 (LoneWolf219) 100 (12795) 2019-02-23 04:51:40
#247 Oliver H (AlfheriH) 100 (804) 2019-02-23 15:14:14
#248 Lia (Lia) 100 (6855) 2019-03-05 22:19:49
#249 Tom GS (gousheng) 100 (4368) 2019-03-08 08:22:29
#250 E41614056 (E41614056) 100 (4062) 2019-03-08 13:56:54
#251 Mike (RogueRamblers) 100 (29805) 2019-03-12 01:17:18
#252 Klaus (kumaus) 100 (21415) 2019-03-14 09:42:14
#253 Nicole (Sarezki) 100 (100) 2019-03-20 14:31:06
#254 Tom (toomderbaumarkt) 100 (600) 2019-03-20 15:00:42
#255 Piyush Agarwal (Piyushgrwl) 100 (4795) 2019-03-20 23:43:58
#256 Jennifer White (Dusty) 100 (501) 2019-03-25 12:26:31
#257 Gabriel Sippel (Sippel) 100 (300) 2019-03-25 18:40:05
#258 Jurian (Jurian95) 100 (2793) 2019-03-30 16:47:10
#259 Darchicourt (Darki) 100 (3308) 2019-04-09 16:33:34
#260 Christian (MarquisDeSud) 100 (7848) 2019-04-11 10:03:58
#261 Eugene (lim0n) 100 (54954) 2019-04-12 15:07:29
#262 Ralf Stephan (rwst) 100 (25229) 2019-04-16 07:50:01
#263 Kame Kaze (kamekazeman) 100 (301) 2019-04-19 00:26:07
#264 r karoly (r_karoly) 100 (4078) 2019-04-30 13:56:18
#265 Gabriel (GMG2022) 100 (300) 2019-05-13 12:06:16
#266 Jeff (Fountain) 100 (8788) 2019-05-25 23:01:30
#267 Mark Bedaywi (Supermac30) 100 (200) 2019-05-27 00:16:28
#268 Aeon (dokyriak) 100 (4081) 2019-05-27 14:43:57
#269 Manfred (katatonius) 100 (2394) 2019-05-29 12:35:49
#270 ENOENT (ENOENT) 100 (13478) 2019-05-31 15:12:46
#271 Stephan (Stephje1978) 100 (26961) 2019-06-02 22:47:53
#272 Simon Hemmerich (simhem) 100 (3779) 2019-06-10 16:23:45
#273 Ryan (Ascendingfox) 100 (400) 2019-06-27 10:46:33
#274 Anna (Timimim) 100 (1892) 2019-06-28 19:36:03
#275 david (sexton) 100 (2801) 2019-07-02 12:17:59
#276 yult (yult) 100 (12185) 2019-07-05 20:09:59
#277 gerdw (gerdw) 100 (28315) 2019-07-11 18:06:36
#278 ajg (ludimus) 100 (11914) 2019-07-15 22:45:36
#279 Egon Hamburger (Seehase) 100 (3746) 2019-07-17 17:20:56
#280 partamier (yann) 100 (5635) 2019-07-23 09:52:07
#281 Erik (Erox) 100 (26141) 2019-07-28 12:36:38
#282 Igor (Doring) 100 (900) 2019-08-12 23:12:27
#283 João Souza (jahjoao) 100 (300) 2019-08-20 02:24:55
#284 Gustavo Staudt (gustaudtklering) 100 (500) 2019-08-23 00:44:47
#285 Denilson (denilson) 100 (900) 2019-08-23 01:45:17
#286 Eduardo de Oliveira (edulycan) 100 (700) 2019-08-23 17:52:07
#287 Gabriel Magro (gabrielmagro) 100 (200) 2019-08-29 23:59:05
#288 Louyse (llb) 100 (1487) 2019-08-30 00:36:38
#289 Jonas (PsyGh0st) 100 (1487) 2019-08-30 00:48:37
#290 cleiton (peres) 100 (600) 2019-09-05 17:13:06
#291 Matheus (m.edinger) 100 (500) 2019-09-06 01:13:30
#292 Hugh (hugh) 100 (3957) 2019-09-15 03:45:41
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Number Sequence — Part 9

[quantum-01] - 68 users already solved this challenge, 54 are working on it.
 
 
 

Are you able to crack the password of Radomil and find the missing 5 digits?
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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: 2017-11-16 17:43
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#68) Achieved points (Global score) y-m-d - h:m:s

nimroth (nimroth cynthor) 200 (6021) 2017-11-16 19:39:34
H. Lautenschlager (helmi) 200 (32947) 2017-11-16 22:27:42
Kurt Gebauer (Yokozuna) 200 (177433) 2017-11-16 23:03:55
Armin Krauss (argh) 200 (188214) 2017-11-17 00:08:50
#5 Dominik M. (Sgt. Pepper) 200 (97919) 2017-11-17 12:20:28
#6 Viktor (Veselovský) 200 (155163) 2017-11-17 14:41:25
#7 D3d4lu5 (D3d4lu5) 150 (297709) 2017-11-18 07:33:32
#8 Robert (rm) 150 (56475) 2017-11-18 16:55:29
#9 S (Zyphe) 133 (10461) 2017-11-19 17:22:18
#10 Bernhard Gruber (bgr) 125 (22889) 2017-11-20 17:27:33
#11 E.T (Ertheb) 120 (81809) 2017-11-21 12:55:32
#12 Bart den Hartog (Bart13) 114 (144081) 2017-11-23 13:22:30
#13 Roland Jansen (roland) 111 (17607) 2017-11-25 08:40:16
#14 Em Doulgerakis (Greko) 108 (124033) 2017-11-29 15:59:37
#15 Rainer Zufall (kiekuk) 107 (56786) 2017-11-29 22:29:26
#16 Andreas Frerichs (Ossili) 107 (33266) 2017-11-30 06:57:08
#17 HolgerK (HolgerK) 104 (25776) 2017-12-08 21:29:19
#18 Mir Dim (mir0soft) 103 (72404) 2017-12-16 00:37:57
#19 Holger (holger) 103 (812) 2017-12-21 10:45:51
#20 KW (qwer*) 103 (13963) 2017-12-21 19:50:41
#21 Ronja (Ronja) 102 (3715) 2017-12-28 17:13:08
#22 Carsten Caliebe (CAKA100) 102 (306) 2018-01-03 23:14:54
#23 Martin (martinbucher) 102 (27363) 2018-01-06 15:01:40
#24 Nofre Tete (noffi) 102 (21921) 2018-01-14 16:40:12
#25 Justin Huber (Kendyy) 101 (303) 2018-02-01 17:42:50
#26 Klaus Kolba (Kolbone) 101 (3107) 2018-02-12 23:56:27
#27 Ulrich Dorobeck (Papageno) 101 (3827) 2018-02-20 20:56:50
#28 Snake (snk) 101 (83889) 2018-02-23 17:46:05
#29 Karl Schutt (günter) 101 (41550) 2018-03-16 19:20:22
#30 Joerg G. (SnifferMaster) 101 (18154) 2018-03-25 13:20:36
#31 Benjamin (200611736) 101 (10186) 2018-04-14 22:15:03
#32 Lucio (lcalderonc) 101 (1251) 2018-04-30 05:37:00
#33 Diaconu Bogdan (bogdan_walle) 100 (1723) 2018-06-18 12:28:51
#34 John Smith (Froyo10) 100 (1747) 2018-06-18 14:08:11
#35 Radu CIRSTEA (radu0627) 100 (100) 2018-06-18 14:09:24
#36 catalin (slg2011) 100 (200) 2018-06-18 14:47:37
#37 tamisrah (tamisrah) 100 (3134) 2018-06-18 17:56:53
#38 jack (jack_) 100 (303) 2018-06-18 17:58:52
#39 Examateur (ExAmateur) 100 (100) 2018-06-19 07:37:44
#40 Chisiu Simona (chisiu.simona) 100 (200) 2018-06-24 10:37:08
#41 Random Dude (rnd) 100 (90929) 2018-07-20 17:37:15
#42 Steve Vaillancourt (stvai2) 100 (15041) 2018-07-27 19:55:44
#43 Julian (Lemmynator) 100 (17953) 2018-08-06 14:30:38
#44 Mathijs Verbeek (QIXL) 100 (3096) 2018-10-17 21:10:56
#45 sarah b (silva) 100 (26264) 2018-10-23 20:45:25
#46 _o_ (_o_) 100 (1000) 2018-10-27 11:18:49
#47 Müller (AKHH17S?) 100 (100) 2018-11-03 19:30:50
#48 SA17S3 (JungerKnacker) 100 (100) 2018-11-11 18:41:39
#49 Robert Fuchs (Robo91) 100 (100) 2018-11-14 21:59:45
#50 Luigi Tomelli (archstanton) 100 (108345) 2018-12-17 13:01:20
#51 zuben c3 (zuben-c3) 100 (24853) 2018-12-17 21:01:10
#52 Bertolo (Bertolo) 100 (7167) 2018-12-26 12:55:02
#53 George (Theofanidis) 100 (112184) 2019-01-09 19:20:03
#54 Michael (FoM) 100 (38953) 2019-01-11 20:48:29
#55 Piotr (lesnik7) 100 (8171) 2019-01-13 19:16:52
#56 Jani (mathpseudo) 100 (902) 2019-01-29 15:33:11
#57 Bastien (jacky) 100 (100) 2019-02-07 22:20:23
#58 Lane Williams (planetlane) 100 (23948) 2019-02-28 16:04:19
#59 Lia (Lia) 100 (6855) 2019-03-05 22:25:04
#60 Piyush Agarwal (Piyushgrwl) 100 (4795) 2019-03-20 19:47:16
#61 Danny Higgins (hamster147) 100 (34088) 2019-03-24 15:04:11
#62 Hughes (hughes) 100 (7925) 2019-04-30 17:28:17
#63 Norbert Biermann (Norbert) 100 (45031) 2019-05-18 21:53:06
#64 Somebody (Achidutzu) 100 (2796) 2019-05-31 19:00:49
#65 david (sexton) 100 (2801) 2019-07-03 20:21:14
#66 Stephan (Stephje1978) 100 (26961) 2019-07-20 20:54:02
#67 gerdw (gerdw) 100 (28315) 2019-07-21 10:03:45
#68 Torben (DoubleT) 100 (100) 2019-08-29 09:10:11
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Hilly — Part 2

[almardeny-02] - 1 user already solved this challenge, 1 is working on it.
 
 
 

Hilly is an improved version of Hill cipher. This challenge consists of the decryption of a ciphertext by means of a partly-known key.
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: 2017-10-17 17:12
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#1) Achieved points (Global score) y-m-d - h:m:s

Em Doulgerakis (Greko) 1156 (124033) 2018-10-29 21:19:05
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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'    +++