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 (294)

Ordered by date posted, the most recent appear first.

Digital Signatures: DSA with Medium Fields
[lange-01] - 0 users already solved this challenge.
 
 
 
This challenge concerns the Discrete Logarithm Problem (DLP) in a "medium" field.
For powers of very small primes and for large prime fields the function-field sieve and the number-field sieve are highly optimized; for intermediate fields algorithms with the same asymptotic behavior exist but the actual running times are slower. Are you able to solve the DLP in such a field anyway?
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-09-02 12:23
Maximum number of attempts for this challenge: 20

All successful users of this challenge

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ADFGVX — Part 2
[simon-02] - 104 users already solved this challenge, 6 are working on it.
 
 
 
A pair of plaintext and the corresponding ciphertext encrypted with the ADFGVX cipher ist given. Can you reveal the substitution and transposition key used in this example?
Read more...

Click here to get to the corresponding forum topic to share your opinion.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-08-15 17:14
Maximum number of attempts for this challenge: 99

All successful users of this challenge

Rank User (#104) Achieved points (Global score) y-m-d - h:m:s
Seth Kintigh (DarkFibre) 200 (79471) 2011-08-15 22:52:12
Daniel Fretwell (fretty) 200 (30107) 2011-08-15 23:37:52
Viktor (Veselovský) 200 (155163) 2011-08-16 03:13:11
dbuq (dbuq) 200 (22762) 2011-08-16 11:32:37
#5 Armin Krauss (argh) 200 (188214) 2011-08-16 14:24:13
#6 J. M. (jomandi) 150 (113270) 2011-08-16 17:56:23
#7 Holti (Holti) 125 (6035) 2011-08-18 21:12:35
#8 Dano (Dano) 120 (14610) 2011-08-20 01:32:07
#9 David (aki321) 117 (27482) 2011-08-21 00:49:50
#10 Michael Möller (michaelm) 114 (175129) 2011-08-22 17:06:13
#11 Wombat (Wombat) 105 (5822) 2011-09-04 16:19:00
#12 Christof Kleber (Loki) 103 (6051) 2011-09-15 14:52:07
#13 Dennis Walter (Lotus) 103 (6827) 2011-09-18 04:04:55
#14 Anton Wendel (MoD) 102 (5679) 2011-09-28 17:21:47
#15 Victoria Fehr (Rika) 102 (1472) 2011-10-10 09:16:48
#16 Bart den Hartog (Bart13) 101 (144081) 2011-11-09 00:49:33
#17 Michal Musilek (mim3) 101 (1121) 2011-11-20 14:51:10
#18 Volker Simon (vosi) 101 (202) 2011-11-22 17:33:49
#19 Annie (Annanasss) 101 (6813) 2011-11-24 22:05:59
#20 Wade Burch (Braernoch) 101 (1308) 2011-12-07 20:14:58
#21 Peter Mustermann (Gummiboot) 101 (60285) 2011-12-30 22:48:06
#22 Tom Tox (tox) 101 (17708) 2012-01-26 19:41:00
#23 George (Theofanidis) 101 (112184) 2012-02-20 11:04:08
#24 Ulrich Dorobeck (Papageno) 101 (3827) 2012-02-20 15:08:36
#25 J Br (j.br) 101 (3242) 2012-02-24 16:15:31
#26 Kurt Gebauer (Yokozuna) 100 (177433) 2012-03-07 20:54:22
#27 Hans Peter (hanspeter) 100 (52256) 2012-03-08 19:48:31
#28 Dusan (xxdradus) 100 (40236) 2012-05-22 18:36:27
#29 Michel Van Caneghem (vancan) 100 (49719) 2012-06-15 21:15:16
#30 Luigi Tomelli (archstanton) 100 (108345) 2012-06-19 11:12:07
#31 Em Doulgerakis (Greko) 100 (125331) 2012-07-21 19:13:40
#32 chris_3stones (3stones) 100 (37759) 2012-07-26 07:49:10
#33 Stepan (m1sterx) 100 (19165) 2012-07-31 19:10:29
#34 KW (qwer*) 100 (13963) 2012-09-06 21:15:13
#35 Manfred Wurm (Tschabobo) 100 (8835) 2012-10-11 09:45:36
#36 Hannes (Hartmann) 100 (8680) 2012-10-15 21:43:56
#37 Sebastian Slupina (Grandwizard) 100 (10866) 2012-11-05 17:43:27
#38 Snake (snk) 100 (86245) 2013-02-02 18:53:12
#39 RPH (derichard) 100 (27044) 2013-04-10 21:12:56
#40 swarmspider (swarmspider) 100 (4528) 2013-04-25 09:30:22
#41 E.T (Ertheb) 100 (81809) 2013-05-22 20:54:49
#42 Almut (problelmo) 100 (45992) 2013-06-01 04:54:13
#43 Thomas Lambert (lambert) 100 (35237) 2013-06-16 15:46:49
#44 Bernhard Gruber (bgr) 100 (22889) 2013-06-26 15:57:48
#45 Hans Joachim Girulat (joregi) 100 (36278) 2013-07-07 19:50:26
#46 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-07-08 07:58:14
#47 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-08-15 11:04:49
#48 Steve (Samacian) 100 (23804) 2013-08-20 04:37:02
#49 George Lasry (george4096) 100 (302230) 2013-08-20 22:46:50
#50 Alexander (cruachan) 100 (16051) 2013-10-26 21:07:58
#51 Boris (Kaasu) 100 (16566) 2013-11-06 10:21:47
#52 Alain (Integral) 100 (207924) 2013-12-28 19:47:48
#53 Bertold (bk) 100 (9673) 2013-12-31 18:00:00
#54 Marcel (bene1512) 100 (20896) 2014-02-09 19:08:37
#55 Karl Schutt (günter) 100 (41550) 2014-05-03 11:37:38
#56 Francisco Moraes (fmoraes) 100 (90044) 2014-07-01 18:00:16
#57 Robert (rm) 100 (56475) 2014-07-31 22:47:10
#58 Julia Bernotat (El Greco ) 100 (81129) 2014-08-03 13:26:25
#59 Pavel (haw) 100 (22728) 2014-12-06 22:05:56
#60 HolgerK (HolgerK) 100 (25776) 2015-01-16 19:37:40
#61 j.h. (haegarq) 100 (15252) 2015-01-22 08:17:21
#62 Andreas Frerichs (Ossili) 100 (33266) 2015-02-25 16:50:34
#63 S Combes (jerva) 100 (99132) 2015-03-11 20:39:27
#64 Vlatiha Romanova (Vlatiha) 100 (10323) 2015-04-09 12:52:56
#65 Rainer Zufall (kiekuk) 100 (56786) 2015-04-28 15:58:00
#66 Michael Ammon (Ammonym) 100 (7719) 2015-06-21 16:16:25
#67 Maria (julesjulchen) 100 (3019) 2015-07-20 11:59:07
#68 Alain Collignon (vexilla72) 100 (96903) 2015-10-11 13:35:25
#69 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-28 06:30:01
#70 Martin (martinbucher) 100 (27363) 2015-12-05 10:32:40
#71 S (Zyphe) 100 (10461) 2015-12-18 12:57:55
#72 Lane Williams (planetlane) 100 (23948) 2016-01-05 19:50:30
#73 Marc (rcll0891) 100 (24004) 2016-01-18 16:16:27
#74 Kerstin (Niam40) 100 (300) 2016-01-30 18:02:43
#75 Ines (bufo01) 100 (4515) 2016-03-02 19:41:28
#76 Peter (Garnet) 100 (14234) 2016-03-22 09:36:02
#77 Lennart (Penthesilea) 100 (4110) 2016-04-16 17:16:43
#78 Imam Uasa (Merricx) 100 (9188) 2016-05-17 20:49:50
#79 Norbert Biermann (Norbert) 100 (45031) 2016-07-16 19:31:12
#80 Dominik M. (Sgt. Pepper) 100 (97919) 2016-08-14 15:50:47
#81 Nicolas (nicosPavlov) 100 (151166) 2016-10-15 13:34:18
#82 zuben c3 (zuben-c3) 100 (24853) 2016-11-20 13:11:11
#83 Michael (FoM) 100 (38953) 2016-12-21 00:52:14
#84 Mir Dim (mir0soft) 100 (72404) 2017-03-22 21:54:22
#85 Julian (Lemmynator) 100 (18353) 2017-04-22 14:37:05
#86 chris (c2) 100 (51973) 2017-04-24 07:22:20
#87 Daniel Walder (ibex) 100 (14672) 2017-04-25 21:57:09
#88 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-21 12:33:01
#89 Tim Fink (Magellan) 100 (4876) 2017-06-29 05:32:18
#90 Immo Weber (MandelToast) 100 (10061) 2017-08-13 16:03:08
#91 Hajoe (Tintin-Muc) 100 (6923) 2017-09-10 09:45:16
#92 nimroth (nimroth cynthor) 100 (6021) 2017-12-25 00:10:34
#93 H. Lautenschlager (helmi) 100 (32947) 2018-01-03 22:44:30
#94 Pen (justtesting) 100 (1697) 2018-01-12 13:31:37
#95 Nofre Tete (noffi) 100 (21921) 2018-02-05 21:28:16
#96 Random Dude (rnd) 100 (95975) 2018-09-04 18:45:59
#97 sarah b (silva) 100 (26264) 2018-10-03 14:02:35
#98 Sergej Schalew (CryptoSolver) 100 (600) 2018-12-05 18:51:26
#99 Javantea (Javantea) 100 (40816) 2018-12-31 21:19:23
#100 Jeff (Fountain) 100 (8788) 2019-06-08 21:14:40
#101 Stephan (Stephje1978) 100 (26961) 2019-06-23 14:52:23
#102 Mike (RogueRamblers) 100 (29805) 2019-06-26 02:45:03
#103 Eugene (lim0n) 100 (64198) 2019-06-29 16:55:42
#104 Danny Higgins (hamster147) 100 (38289) 2019-10-18 18:32:56
You must be logged in to solve the challenge


ADFGVX — Part 1
[simon-01] - 95 users already solved this challenge, 7 are working on it.
 
 
 
A small ciphertext encrypted with the ADFGVX cipher, which has been used during World War I, is given. Are you able to reveal the plaintext message?
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-08-15 17:11
Maximum number of attempts for this challenge: 99

All successful users of this challenge

Rank User (#95) Achieved points (Global score) y-m-d - h:m:s
Daniel Fretwell (fretty) 200 (30107) 2011-08-16 00:59:40
Seth Kintigh (DarkFibre) 200 (79471) 2011-08-16 01:43:25
Viktor (Veselovský) 200 (155163) 2011-08-16 02:35:18
Armin Krauss (argh) 200 (188214) 2011-08-16 14:23:30
#5 J. M. (jomandi) 150 (113270) 2011-08-16 17:15:28
#6 Dano (Dano) 120 (14610) 2011-08-20 00:16:30
#7 David (aki321) 117 (27482) 2011-08-21 00:32:31
#8 Michael Möller (michaelm) 114 (175129) 2011-08-21 18:00:52
#9 Wombat (Wombat) 105 (5822) 2011-09-04 15:38:45
#10 Dennis Walter (Lotus) 103 (6827) 2011-09-18 03:40:16
#11 Anton Wendel (MoD) 102 (5679) 2011-09-29 00:57:24
#12 Victoria Fehr (Rika) 102 (1472) 2011-09-29 10:00:40
#13 Bart den Hartog (Bart13) 101 (144081) 2011-11-08 06:36:40
#14 Volker Simon (vosi) 101 (202) 2011-11-22 17:30:26
#15 Michal Musilek (mim3) 101 (1121) 2011-11-24 21:47:05
#16 Annie (Annanasss) 101 (6813) 2011-11-25 23:06:36
#17 Peter Mustermann (Gummiboot) 101 (60285) 2011-12-28 19:46:24
#18 Tom Tox (tox) 101 (17708) 2012-01-25 19:58:07
#19 Ulrich Dorobeck (Papageno) 101 (3827) 2012-02-20 11:20:58
#20 George (Theofanidis) 100 (112184) 2012-03-07 13:20:50
#21 Kurt Gebauer (Yokozuna) 100 (177433) 2012-03-08 17:34:48
#22 Hans Peter (hanspeter) 100 (52256) 2012-03-08 19:48:20
#23 Dusan (xxdradus) 100 (40236) 2012-05-22 15:37:00
#24 Michel Van Caneghem (vancan) 100 (49719) 2012-06-15 21:54:24
#25 chris_3stones (3stones) 100 (37759) 2012-07-26 07:48:17
#26 Stepan (m1sterx) 100 (19165) 2012-07-31 18:57:27
#27 KW (qwer*) 100 (13963) 2012-10-29 21:23:37
#28 Sebastian Slupina (Grandwizard) 100 (10866) 2012-11-16 16:03:23
#29 Luigi Tomelli (archstanton) 100 (108345) 2013-03-20 13:12:22
#30 RPH (derichard) 100 (27044) 2013-04-10 21:26:21
#31 swarmspider (swarmspider) 100 (4528) 2013-04-29 09:35:09
#32 Snake (snk) 100 (86245) 2013-05-12 22:06:07
#33 E.T (Ertheb) 100 (81809) 2013-05-15 22:24:53
#34 Almut (problelmo) 100 (45992) 2013-06-27 06:20:37
#35 Bernhard Gruber (bgr) 100 (22889) 2013-07-02 16:33:11
#36 Hans Joachim Girulat (joregi) 100 (36278) 2013-07-07 18:32:34
#37 Em Doulgerakis (Greko) 100 (125331) 2013-08-07 14:48:32
#38 Philipp Hammer-Pohlau (phase2) 100 (17981) 2013-08-15 10:20:28
#39 Steve (Samacian) 100 (23804) 2013-08-20 04:14:13
#40 George Lasry (george4096) 100 (302230) 2013-08-20 23:05:59
#41 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-08-29 19:30:38
#42 Alexander (cruachan) 100 (16051) 2013-10-25 22:12:34
#43 Boris (Kaasu) 100 (16566) 2013-11-06 09:46:40
#44 Alain (Integral) 100 (207924) 2013-12-28 17:56:05
#45 Bertold (bk) 100 (9673) 2013-12-31 17:58:56
#46 Marcel (bene1512) 100 (20896) 2014-02-09 19:22:15
#47 Karl Schutt (günter) 100 (41550) 2014-05-03 12:37:30
#48 Francisco Moraes (fmoraes) 100 (90044) 2014-07-02 16:58:08
#49 Robert (rm) 100 (56475) 2014-07-31 22:46:07
#50 Julia Bernotat (El Greco ) 100 (81129) 2014-08-03 11:55:49
#51 Pavel (haw) 100 (22728) 2014-12-07 10:57:30
#52 HolgerK (HolgerK) 100 (25776) 2015-01-16 19:36:15
#53 S Combes (jerva) 100 (99132) 2015-01-17 20:49:16
#54 j.h. (haegarq) 100 (15252) 2015-01-21 16:17:43
#55 Andreas Frerichs (Ossili) 100 (33266) 2015-02-25 19:06:29
#56 Vlatiha Romanova (Vlatiha) 100 (10323) 2015-04-08 19:43:10
#57 Rainer Zufall (kiekuk) 100 (56786) 2015-04-28 18:37:23
#58 Michael Ammon (Ammonym) 100 (7719) 2015-06-21 15:43:47
#59 Maria (julesjulchen) 100 (3019) 2015-07-19 15:26:15
#60 Alain Collignon (vexilla72) 100 (96903) 2015-10-11 14:17:43
#61 Szabó Zoltán (szabo.z87) 100 (55604) 2015-11-29 10:02:34
#62 Martin (martinbucher) 100 (27363) 2015-11-29 14:40:50
#63 S (Zyphe) 100 (10461) 2015-12-18 11:34:57
#64 Marc (rcll0891) 100 (24004) 2016-01-18 15:48:53
#65 Kerstin (Niam40) 100 (300) 2016-01-30 17:27:17
#66 Ines (bufo01) 100 (4515) 2016-02-21 23:06:55
#67 Peter (Garnet) 100 (14234) 2016-03-21 16:23:36
#68 Lennart (Penthesilea) 100 (4110) 2016-04-16 16:56:11
#69 Dominik M. (Sgt. Pepper) 100 (97919) 2016-08-14 14:58:51
#70 Norbert Biermann (Norbert) 100 (45031) 2016-09-21 13:15:48
#71 Nicolas (nicosPavlov) 100 (151166) 2016-10-15 12:52:05
#72 zuben c3 (zuben-c3) 100 (24853) 2016-11-19 20:24:49
#73 Michael (FoM) 100 (38953) 2016-12-29 02:59:33
#74 Mir Dim (mir0soft) 100 (72404) 2017-03-22 21:01:31
#75 Julian (Lemmynator) 100 (18353) 2017-04-22 23:40:09
#76 chris (c2) 100 (51973) 2017-04-24 09:16:14
#77 Daniel Walder (ibex) 100 (14672) 2017-04-25 21:54:02
#78 D3d4lu5 (D3d4lu5) 100 (297709) 2017-06-21 00:32:59
#79 Tim Fink (Magellan) 100 (4876) 2017-06-24 05:16:56
#80 Immo Weber (MandelToast) 100 (10061) 2017-08-07 00:01:06
#81 Hajoe (Tintin-Muc) 100 (6923) 2017-09-08 22:58:57
#82 nimroth (nimroth cynthor) 100 (6021) 2017-12-24 22:33:28
#83 H. Lautenschlager (helmi) 100 (32947) 2018-01-03 20:00:22
#84 Pen (justtesting) 100 (1697) 2018-01-12 13:31:30
#85 Lane Williams (planetlane) 100 (23948) 2018-02-04 00:55:59
#86 Nofre Tete (noffi) 100 (21921) 2018-03-11 23:48:51
#87 Eric (ExAstris) 100 (26990) 2018-05-17 20:47:15
#88 Random Dude (rnd) 100 (95975) 2018-09-07 03:22:26
#89 sarah b (silva) 100 (26264) 2018-10-04 10:31:22
#90 Javantea (Javantea) 100 (40816) 2018-12-31 21:07:57
#91 Jeff (Fountain) 100 (8788) 2019-06-02 02:37:49
#92 Stephan (Stephje1978) 100 (26961) 2019-06-23 17:19:58
#93 Eugene (lim0n) 100 (64198) 2019-06-29 15:13:56
#94 Mike (RogueRamblers) 100 (29805) 2019-07-14 17:23:49
#95 Danny Higgins (hamster147) 100 (38289) 2019-10-18 13:20:55
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RSA: Two different keys — same ciphertext
[brunner-02] - 139 users already solved this challenge, 9 are working on it.
 
 
 
You found out that a message encrypted with two different public keys but same modulus yield to the same ciphertexts. Are you able to name the smallest private key to decrypt ciphertexts that were generated with this parameters?
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: 2011-08-15 17:03
Maximum number of attempts for this challenge: 99

All successful users of this challenge

Rank User (#139) Achieved points (Global score) y-m-d - h:m:s
Daniel Fretwell (fretty) 2000 (30107) 2011-08-15 19:34:25
Armin Krauss (argh) 2000 (188214) 2011-08-15 19:49:05
Viktor (Veselovský) 2000 (155163) 2011-08-15 20:15:53
Seth Kintigh (DarkFibre) 2000 (79471) 2011-08-15 20:37:50
#5 J. M. (jomandi) 2000 (113270) 2011-08-15 21:52:33
#6 mischa (mmisc) 2000 (22426) 2011-08-16 02:37:29
#7 Dano (Dano) 2000 (14610) 2011-08-16 02:55:19
#8 Peter Mustermann (Gummiboot) 1824 (60285) 2011-08-16 22:09:03
#9 dbuq (dbuq) 1824 (22762) 2011-08-17 16:29:11
#10 Robbt Neid (Das Tupel) 1725 (9403) 2011-08-17 21:37:18
#11 Nicolas Golubovic (qll) 1725 (14919) 2011-08-17 22:42:58
#12 Flip (Flip) 1725 (31107) 2011-08-18 14:14:30
#13 kyprizel (kyprizel) 1725 (20795) 2011-08-18 14:27:20
#14 David (aki321) 1547 (27482) 2011-08-21 17:54:42
#15 The Killer (Killer) 1547 (42393) 2011-08-22 00:04:00
#16 h3po (h3po) 1523 (20433) 2011-08-22 22:54:04
#17 Christian Inci (ch100) 1324 (9253) 2011-09-18 01:30:51
#18 Thomas Lambert (lambert) 1286 (35237) 2011-10-03 17:37:17
#19 Keith Randall (randall77) 1249 (31011) 2011-11-01 05:59:47
#20 Bart den Hartog (Bart13) 1222 (144081) 2011-12-07 15:44:52
#21 Nathan (Witten) 1217 (25326) 2011-12-16 00:00:09
#22 Jan Temme (JaT3) 1214 (11694) 2011-12-22 08:18:21
#23 Michel Van Caneghem (vancan) 1193 (49719) 2012-02-12 23:15:13
#24 Hans Peter (hanspeter) 1190 (52256) 2012-02-21 21:22:06
#25 Luigi Tomelli (archstanton) 1185 (108345) 2012-03-12 09:59:52
#26 FirstLast (TheRational) 1184 (1753) 2012-03-16 00:37:11
#27 Thomas Gonda (TomG) 1184 (36291) 2012-03-16 20:41:48
#28 sam (sam.jerry) 1184 (1184) 2012-03-17 03:16:37
#29 ranjith (ranjith.kumar) 1184 (1184) 2012-03-17 03:21:43
#30 Kurt Gebauer (Yokozuna) 1181 (177433) 2012-03-28 13:14:29
#31 George (Theofanidis) 1173 (112184) 2012-05-05 19:18:44
#32 Dusan (xxdradus) 1169 (40236) 2012-05-28 10:40:18
#33 chris_3stones (3stones) 1167 (37759) 2012-06-10 12:38:36
#34 zuben c3 (zuben-c3) 1164 (24853) 2012-06-28 12:05:56
#35 Em Doulgerakis (Greko) 1161 (125331) 2012-07-16 16:57:03
#36 Christian (Etschupu) 1161 (31788) 2012-07-17 12:00:03
#37 Stepan (m1sterx) 1154 (19165) 2012-09-07 07:59:29
#38 RPH (derichard) 1153 (27044) 2012-09-16 15:57:23
#39 Hank (hanky) 1150 (22859) 2012-10-18 19:11:53
#40 E.T (Ertheb) 1149 (81809) 2012-10-27 17:23:29
#41 Binit (binit.00354) 1148 (1248) 2012-11-05 23:14:54
#42 The Enigma (enigma) 1147 (14336) 2012-11-13 19:01:45
#43 Claude Laveaux (claude.laveaux) 1143 (14504) 2012-12-31 00:39:12
#44 Shailesh Padave (shaileshpadave) 1138 (2261) 2013-03-21 06:13:51
#45 mk (bilbobeutlin) 1136 (12340) 2013-04-20 10:55:19
#46 Velko Nikolov (staafl) 1136 (13467) 2013-04-20 19:53:39
#47 Almut (problelmo) 1135 (45992) 2013-04-29 08:56:12
#48 Gergely Simon (george314) 1132 (16555) 2013-06-26 01:44:59
#49 Wolfgang Weisser (wowmyst) 1131 (33108) 2013-07-12 21:03:05
#50 zahir mohsen moradi (ariobarzan) 1131 (99757) 2013-07-15 21:12:03
#51 Philipp Hammer-Pohlau (phase2) 1130 (17981) 2013-07-24 12:50:23
#52 Ralf Stephan (rwst) 1130 (25229) 2013-07-29 10:23:44
#53 Forrest Gump (Polyphem) 1128 (38763) 2013-08-29 00:08:48
#54 Steve (Samacian) 1126 (23804) 2013-10-11 07:22:55
#55 Boris (Kaasu) 1125 (16566) 2013-11-04 19:02:34
#56 Jaideep (Illusionist21) 1125 (1325) 2013-11-07 19:14:20
#57 Nikitha Ganesh (nikitha.ganesh) 1125 (1125) 2013-11-07 22:41:39
#58 Francisco Moraes (fmoraes) 1125 (90044) 2013-11-11 22:26:56
#59 Brad (braddrew) 1123 (15878) 2013-12-21 02:07:34
#60 Max Mustermann (MustermM) 1123 (6661) 2014-01-06 18:48:32
#61 Alain (Integral) 1123 (207924) 2014-01-06 19:18:21
#62 Pavel (haw) 1122 (22728) 2014-01-13 13:07:02
#63 Kim H. S. (tenchijin) 1121 (25468) 2014-03-04 14:41:54
#64 hellman (hellman) 1120 (14862) 2014-03-13 10:01:45
#65 Karl Schutt (günter) 1119 (41550) 2014-04-06 12:39:58
#66 Thomas Schmucker (dg) 1118 (26066) 2014-05-07 13:58:32
#67 Igor (idipaolo) 1118 (10639) 2014-05-22 18:04:27
#68 Snake (snk) 1117 (86245) 2014-06-06 10:02:42
#69 Peter (51dc30ddc) 1116 (10916) 2014-07-27 00:56:40
#70 julius gaius (julius) 1116 (25581) 2014-07-31 01:55:41
#71 Robert (rm) 1116 (56475) 2014-07-31 23:15:56
#72 Christof B. (beans90) 1115 (9488) 2014-08-10 22:52:31
#73 baz (oneiron) 1115 (12353) 2014-08-15 07:00:09
#74 yubo (yubo) 1113 (1113) 2014-11-04 03:42:43
#75 Julia Bernotat (El Greco ) 1112 (81129) 2014-11-27 21:43:00
#76 Kai Ludwig (TalentRaspel) 1111 (15704) 2015-01-13 01:15:34
#77 Claude Vaillancourt (Cl3v3r) 1111 (38351) 2015-01-14 18:41:21
#78 Shoukat (e195633) 1110 (10617) 2015-02-12 22:02:06
#79 Konstantin Golovan (SoulShaker) 1110 (14091) 2015-03-10 17:02:06
#80 lankbumbum (lankbumbum) 1110 (1310) 2015-03-17 05:06:31
#81 Jie Chen (vmd) 1110 (3336) 2015-03-20 07:17:30
#82 Jayesh (jayesh) 1110 (1110) 2015-03-21 03:25:15
#83 Jeremy Chuang (jeremhh) 1110 (6643) 2015-03-21 03:34:01
#84 lihao (gelihao609) 1110 (3335) 2015-03-21 04:20:01
#85 R (r?) 1110 (6742) 2015-03-21 07:03:40
#86 Rainer Zufall (kiekuk) 1109 (56786) 2015-04-01 11:48:38
#87 Sean (Kavanaugh) 1106 (29143) 2015-08-14 08:51:09
#88 Javantea (Javantea) 1106 (40816) 2015-08-17 22:33:32
#89 Alain Collignon (vexilla72) 1105 (96903) 2015-10-30 17:47:39
#90 S Combes (jerva) 1105 (99132) 2015-11-07 08:26:06
#91 Martin (martinbucher) 1105 (27363) 2015-11-10 11:27:09
#92 Szabó Zoltán (szabo.z87) 1105 (55604) 2015-11-19 07:13:38
#93 Dominik M. (Sgt. Pepper) 1104 (97919) 2015-12-22 15:26:39
#94 T (Wagner) 1104 (16988) 2015-12-30 13:29:27
#95 Andreas Frerichs (Ossili) 1103 (33266) 2016-02-22 11:31:02
#96 Anupreet Kaur (anupreet.kaur) 1103 (1103) 2016-03-05 22:09:25
#97 Shreeraj (shreeraj1746) 1103 (1103) 2016-03-05 23:17:19
#98 Marco Manfredi (mkk9901) 1102 (17686) 2016-03-14 22:14:01
#99 Norbert Biermann (Norbert) 1101 (45031) 2016-07-06 16:57:08
#100 Flo (sealth) 1100 (13472) 2016-08-22 05:45:48
#101 Nicolas (nicosPavlov) 1099 (151166) 2016-10-05 17:35:05
#102 Simon Jakob (simon.jakob) 1098 (18714) 2016-11-29 19:43:15
#103 JoGo (JoGo) 1098 (11686) 2016-12-05 15:16:55
#104 Marcel (bene1512) 1098 (20896) 2017-01-07 21:24:58
#105 Michael (FoM) 1098 (38953) 2017-01-29 22:55:07
#106 Tristan1473 (Tristan1473) 1098 (18914) 2017-02-05 11:03:09
#107 Mir Dim (mir0soft) 1097 (72404) 2017-03-18 07:28:30
#108 chris (c2) 1097 (51973) 2017-03-26 21:10:22
#109 Kasia (kasia-tutej) 1096 (53366) 2017-06-04 14:33:07
#110 Mihail (plexor) 1096 (16827) 2017-06-08 14:40:56
#111 D3d4lu5 (D3d4lu5) 1096 (297709) 2017-07-02 03:46:17
#112 Akonia (Akonia12) 1095 (12153) 2017-07-22 13:03:03
#113 George Lasry (george4096) 1095 (302230) 2017-08-05 16:10:38
#114 Godfrey Norton (Godfrey) 1095 (8162) 2017-08-06 14:52:38
#115 Immo Weber (MandelToast) 1095 (10061) 2017-08-19 20:33:41
#116 Silvia Kortmann (mikinsget) 1092 (10104) 2018-05-09 00:56:39
#117 Steve Vaillancourt (stvai2) 1092 (15041) 2018-05-13 17:26:47
#118 Erik (Erox) 1092 (26141) 2018-05-15 14:12:27
#119 Eric (ExAstris) 1092 (26990) 2018-05-29 00:37:02
#120 Christophe BORELLY (cb34) 1092 (12358) 2018-06-15 11:28:24
#121 Random Dude (rnd) 1091 (95975) 2018-08-20 02:31:49
#122 Lane Williams (planetlane) 1091 (23948) 2018-09-08 20:00:55
#123 Manfred Paul (manf) 1090 (14774) 2018-11-14 17:26:37
#124 Alexei Tcharykov (Nervniy) 1089 (1189) 2019-03-04 12:50:28
#125 LoneWolf219 (LoneWolf219) 1089 (12795) 2019-03-10 23:32:27
#126 ykaridi (ykaridi) 1089 (7035) 2019-03-22 23:33:02
#127 Klaus (kumaus) 1089 (21415) 2019-03-29 12:57:19
#128 madness (madness) 1089 (15407) 2019-04-06 23:14:22
#129 Marco Cinelli (Snap) 1089 (28365) 2019-05-07 22:28:10
#130 Eugene (lim0n) 1089 (64198) 2019-05-10 11:20:38
#131 ENOENT (ENOENT) 1089 (13478) 2019-05-31 16:36:54
#132 Mike (RogueRamblers) 1088 (29805) 2019-06-17 16:29:51
#133 gerdw (gerdw) 1088 (30489) 2019-07-16 09:02:09
#134 yult (yult) 1088 (12185) 2019-07-16 10:31:17
#135 Stephan (Stephje1978) 1088 (26961) 2019-08-18 11:44:54
#136 Dr. Peter Uelkes (RandyWaterhouse) 1088 (9990) 2019-08-19 07:26:33
#137 Wei-Ting Tu (weiting) 1088 (1088) 2019-09-21 13:53:32
#138 CHANG HAN CHIH (hanchih0224) 1088 (1088) 2019-09-21 22:22:55
#139 Yan Chen (ychen101) 1088 (1088) 2019-10-06 09:08:22
You must be logged in to solve the challenge


Broadcasting and low exponent — RSA-Attack
[brunner-01] - 191 users already solved this challenge, 2 are working on it.
 
 
 
A message was encrypted with three different moduli but the same public exponent.
Fortunately, you were able to catch the three different ciphertexts.
Are you able to recover the secret message?
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.
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: 2011-07-22 20:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#191) Achieved points (Global score) y-m-d - h:m:s
Daniel Fretwell (fretty) 2000 (30107) 2011-07-22 20:34:43
mischa (mmisc) 2000 (22426) 2011-07-22 21:25:54
J. M. (jomandi) 2000 (113270) 2011-07-22 21:37:01
Seth Kintigh (DarkFibre) 2000 (79471) 2011-07-22 22:39:56
#5 Peter Mustermann (Gummiboot) 2000 (60285) 2011-07-23 15:36:23
#6 Robbt Neid (Das Tupel) 1824 (9403) 2011-07-24 01:27:01
#7 Simon Jakob (simon.jakob) 1725 (18714) 2011-07-25 02:38:53
#8 Armin Krauss (argh) 1725 (188214) 2011-07-25 19:41:13
#9 Viktor (Veselovský) 1523 (155163) 2011-07-30 02:18:39
#10 Dano (Dano) 1398 (14610) 2011-08-09 09:24:19
#11 kyprizel (kyprizel) 1391 (20795) 2011-08-10 17:08:57
#12 Flip (Flip) 1344 (31107) 2011-08-19 11:09:55
#13 Nicolas Golubovic (qll) 1337 (14919) 2011-08-20 20:14:53
#14 dbuq (dbuq) 1337 (22762) 2011-08-21 12:48:03
#15 David (aki321) 1337 (27482) 2011-08-21 13:13:07
#16 h3po (h3po) 1337 (20433) 2011-08-21 14:00:41
#17 The Killer (Killer) 1333 (42393) 2011-08-21 23:39:35
#18 Lu Kas (DrunkenPanda) 1333 (1835) 2011-08-22 00:29:11
#19 Ph il (audioPhil) 1333 (1935) 2011-08-22 00:34:20
#20 Cleyton Muto (accepted_rush) 1324 (5578) 2011-08-25 18:16:35
#21 Roland Jansen (roland) 1269 (17607) 2011-09-21 13:21:02
#22 Thomas Gonda (TomG) 1251 (36291) 2011-10-05 21:35:42
#23 marmotte (marmotte) 1244 (1549) 2011-10-14 18:59:04
#24 Christian Matt (Luy) 1236 (9889) 2011-10-22 20:55:54
#25 Bart den Hartog (Bart13) 1219 (144081) 2011-11-18 03:55:29
#26 Keith Randall (randall77) 1211 (31011) 2011-12-03 06:30:40
#27 Nathan (Witten) 1207 (25326) 2011-12-11 20:56:25
#28 Jan Temme (JaT3) 1203 (11694) 2011-12-22 00:21:39
#29 Alan Dixon (NickBourbaki) 1190 (7761) 2012-01-30 20:37:35
#30 Michel Van Caneghem (vancan) 1186 (49719) 2012-02-11 19:12:48
#31 Hans Peter (hanspeter) 1184 (52256) 2012-02-21 21:41:28
#32 Lukas (Kahla) 1182 (4719) 2012-02-29 15:58:13
#33 Govind Kalyankar (nakul22) 1181 (1181) 2012-03-03 08:28:09
#34 Artem (ArthaZz) 1179 (1280) 2012-03-12 02:13:23
#35 Luigi Tomelli (archstanton) 1179 (108345) 2012-03-13 09:42:50
#36 Kurt Gebauer (Yokozuna) 1175 (177433) 2012-03-29 10:19:05
#37 Steluta P. (maty_star) 1172 (5734) 2012-04-14 01:43:42
#38 Daniel Demmler (dd23) 1169 (8942) 2012-04-29 22:10:38
#39 Dusan (xxdradus) 1166 (40236) 2012-05-23 13:37:52
#40 George (Theofanidis) 1163 (112184) 2012-06-10 23:32:48
#41 zuben c3 (zuben-c3) 1160 (24853) 2012-06-28 09:06:51
#42 Ralf Stephan (rwst) 1160 (25229) 2012-07-01 11:02:29
#43 Christian (Etschupu) 1159 (31788) 2012-07-11 10:42:54
#44 Em Doulgerakis (Greko) 1157 (125331) 2012-07-19 23:28:49
#45 chris_3stones (3stones) 1157 (37759) 2012-07-26 07:49:47
#46 Stepan (m1sterx) 1152 (19165) 2012-09-06 09:32:15
#47 RPH (derichard) 1151 (27044) 2012-09-16 13:15:04
#48 Hank (hanky) 1150 (22859) 2012-09-25 22:42:50
#49 Hannes (Hartmann) 1150 (8680) 2012-09-27 21:16:18
#50 PRADEEP ROY (pmohanroy) 1148 (1148) 2012-10-15 08:15:26
#51 LokmanyaThilak (gs.thilak) 1148 (1148) 2012-10-15 08:19:26
#52 sevieron (sevieron) 1147 (1147) 2012-10-22 20:17:06
#53 E.T (Ertheb) 1147 (81809) 2012-10-26 22:30:03
#54 Friedrich Wiemer (asante) 1146 (5183) 2012-11-04 22:18:00
#55 PRADEEP ROY (PRADEEPROYCS265) 1146 (1146) 2012-11-10 06:51:32
#56 The Enigma (enigma) 1146 (14336) 2012-11-12 16:35:59
#57 Julia Werdelmann (jw) 1142 (10407) 2012-12-23 00:57:07
#58 Tron (Tron) 1142 (7381) 2012-12-23 21:00:43
#59 Claude Laveaux (claude.laveaux) 1142 (14504) 2012-12-30 22:47:05
#60 zahir mohsen moradi (ariobarzan) 1139 (99757) 2013-02-02 17:31:10
#61 mk (bilbobeutlin) 1136 (12340) 2013-03-20 08:53:40
#62 Velko Nikolov (staafl) 1135 (13467) 2013-04-12 15:35:54
#63 Almut (problelmo) 1134 (45992) 2013-04-29 06:32:11
#64 Wolfgang Weisser (wowmyst) 1130 (33108) 2013-07-12 23:39:14
#65 Philipp Hammer-Pohlau (phase2) 1129 (17981) 2013-07-22 18:46:49
#66 masam (jimboo) 1128 (18687) 2013-08-22 12:30:10
#67 Forrest Gump (Polyphem) 1127 (38763) 2013-08-27 16:50:44
#68 Steve (Samacian) 1127 (23804) 2013-09-06 06:19:21
#69 Gergely Simon (george314) 1126 (16555) 2013-09-27 20:37:57
#70 Alexander (cruachan) 1126 (16051) 2013-09-29 16:05:03
#71 Snake (snk) 1125 (86245) 2013-10-07 15:04:30
#72 Boris (Kaasu) 1125 (16566) 2013-10-18 19:21:59
#73 Swathi Pai (swathi3184) 1124 (3354) 2013-11-03 20:27:28
#74 Francisco Moraes (fmoraes) 1124 (90044) 2013-11-06 16:14:19
#75 Brad (braddrew) 1123 (15878) 2013-12-09 10:51:35
#76 jonathan (munz) 1122 (8954) 2013-12-30 04:57:50
#77 Csaba Fitzl (csaby) 1122 (6696) 2014-01-02 11:08:24
#78 Alain (Integral) 1122 (207924) 2014-01-06 17:26:10
#79 Pavel (haw) 1122 (22728) 2014-01-12 20:34:01
#80 Michael Doucha (mdou) 1120 (13757) 2014-02-18 15:24:44
#81 Duy Khanh Dau (khanh45a3kct) 1119 (5783) 2014-03-10 21:59:10
#82 hellman (hellman) 1119 (14862) 2014-03-13 10:05:36
#83 caesar ([caesar]) 1119 (10738) 2014-03-23 20:48:32
#84 Karl Schutt (günter) 1119 (41550) 2014-04-05 14:09:56
#85 Thomas Schmucker (dg) 1118 (26066) 2014-05-07 12:15:25
#86 Michael (pheenyx) 1117 (3840) 2014-05-23 22:57:25
#87 Igor (idipaolo) 1117 (10639) 2014-05-25 21:35:30
#88 julius gaius (julius) 1115 (25581) 2014-07-21 17:31:26
#89 Peter (51dc30ddc) 1115 (10916) 2014-07-23 23:42:03
#90 Robert (rm) 1115 (56475) 2014-08-08 18:26:25
#91 Konstantin (tempestadept) 1113 (3847) 2014-10-23 10:30:51
#92 Samyuktha Tina (samyusridhar) 1112 (2218) 2014-11-04 00:49:49
#93 Glaudson Ocampos (nashleon) 1112 (1820) 2014-11-05 01:25:18
#94 Julia Bernotat (El Greco ) 1112 (81129) 2014-11-26 18:54:07
#95 Kai Ludwig (TalentRaspel) 1111 (15704) 2015-01-12 22:36:12
#96 Claude Vaillancourt (Cl3v3r) 1110 (38351) 2015-01-16 23:03:12
#97 Shoukat (e195633) 1110 (10617) 2015-02-03 00:12:16
#98 Danny Higgins (hamster147) 1110 (38289) 2015-02-15 20:25:39
#99 Konstantin Golovan (SoulShaker) 1109 (14091) 2015-03-07 20:21:17
#100 R (r?) 1109 (6742) 2015-03-19 16:40:39
#101 Jeremy Chuang (jeremhh) 1109 (6643) 2015-03-19 16:43:34
#102 Rainer Zufall (kiekuk) 1109 (56786) 2015-04-01 09:53:07
#103 Erik (Erox) 1107 (26141) 2015-07-15 22:35:49
#104 Fabio (degrigis) 1106 (1206) 2015-07-18 15:07:23
#105 Javantea (Javantea) 1106 (40816) 2015-07-27 20:21:58
#106 J-L Morel (Rossignol) 1106 (29425) 2015-07-29 15:11:01
#107 Sean (Kavanaugh) 1106 (29143) 2015-08-13 20:11:59
#108 Ylona (Sirene) 1105 (4425) 2015-09-07 13:58:02
#109 Kokx (kokx) 1105 (4810) 2015-09-07 14:26:49
#110 S Combes (jerva) 1105 (99132) 2015-10-24 20:52:09
#111 Alain Collignon (vexilla72) 1104 (96903) 2015-10-30 17:18:06
#112 Szabó Zoltán (szabo.z87) 1104 (55604) 2015-11-09 14:26:42
#113 Martin (martinbucher) 1104 (27363) 2015-11-09 16:25:42
#114 Rainer (Rainer74) 1104 (8417) 2015-12-21 19:45:28
#115 Dominik M. (Sgt. Pepper) 1104 (97919) 2015-12-22 11:56:41
#116 T (Wagner) 1103 (16988) 2015-12-27 18:38:26
#117 Casaubon (cfreuden) 1103 (8515) 2016-01-13 17:08:09
#118 D (devilchn) 1103 (11142) 2016-02-05 14:00:40
#119 Andreas Frerichs (Ossili) 1102 (33266) 2016-02-19 12:06:59
#120 Marco Manfredi (mkk9901) 1102 (17686) 2016-03-14 15:06:45
#121 Vigneshwari Chandrasekaran (vigneshwari24) 1102 (1102) 2016-03-18 05:02:31
#122 Madhura Kaple (madhura) 1102 (1102) 2016-03-18 21:06:59
#123 Felix (Flix) 1102 (13712) 2016-04-12 22:10:21
#124 Peter (Garnet) 1101 (14234) 2016-04-21 12:01:51
#125 Wieland (wisch) 1101 (6633) 2016-05-30 21:08:29
#126 Norbert Biermann (Norbert) 1100 (45031) 2016-07-06 08:58:08
#127 Vlatiha Romanova (Vlatiha) 1100 (10323) 2016-08-04 11:38:43
#128 Flo (sealth) 1100 (13472) 2016-08-22 04:17:57
#129 Nicolas (nicosPavlov) 1099 (151166) 2016-09-29 17:40:27
#130 JoGo (JoGo) 1098 (11686) 2016-12-04 21:47:52
#131 Marcel (bene1512) 1098 (20896) 2017-01-07 19:23:10
#132 Michael (FoM) 1097 (38953) 2017-01-25 09:15:19
#133 Tristan1473 (Tristan1473) 1097 (18914) 2017-02-12 10:44:29
#134 Hans Joachim Girulat (joregi) 1097 (36278) 2017-02-26 00:56:53
#135 Mir Dim (mir0soft) 1097 (72404) 2017-03-14 08:15:29
#136 chris (c2) 1097 (51973) 2017-03-14 10:47:13
#137 Jane Alam Jan (jan876) 1097 (1097) 2017-03-22 10:28:28
#138 Tazmina Riya (Tazmina Riya) 1097 (1097) 2017-03-24 21:55:02
#139 Ajay Prashant (Ajay_Prashant) 1097 (2491) 2017-03-25 00:50:01
#140 Daniel Walder (ibex) 1096 (14672) 2017-04-27 23:01:20
#141 Kasia (kasia-tutej) 1096 (53366) 2017-05-30 12:38:55
#142 john doe (misio) 1096 (7371) 2017-05-30 12:58:09
#143 Mihail (plexor) 1096 (16827) 2017-06-04 13:51:15
#144 D3d4lu5 (D3d4lu5) 1096 (297709) 2017-06-12 20:37:00
#145 Imam Uasa (Merricx) 1096 (9188) 2017-06-13 16:50:49
#146 NGUYEN Ngoc Ky (kynguyenngoc) 1096 (4974) 2017-06-18 15:07:26
#147 Akonia (Akonia12) 1095 (12153) 2017-07-16 16:48:29
#148 Moomin (Mushmom) 1095 (7674) 2017-07-21 09:18:41
#149 George Lasry (george4096) 1095 (302230) 2017-07-30 13:25:55
#150 juw (juw) 1095 (4179) 2017-08-10 21:39:51
#151 Immo Weber (MandelToast) 1095 (10061) 2017-08-19 18:38:33
#152 Kim H. S. (tenchijin) 1095 (25468) 2017-08-23 13:27:42
#153 Julian (Lemmynator) 1095 (18353) 2017-09-16 14:52:02
#154 Pratik Patil (pratikvpatil) 1094 (1094) 2017-10-12 01:31:05
#155 jace chan (fattywompus) 1094 (1094) 2017-10-12 01:39:13
#156 Pratik Patil (pratikvpatil1234) 1094 (1094) 2017-10-12 04:52:34
#157 Aijun (geaijun) 1093 (3379) 2018-01-07 11:39:14
#158 Timothy Chow (timmah) 1093 (1093) 2018-03-13 22:14:11
#159 Tom Tox (tox) 1093 (17708) 2018-03-14 13:40:43
#160 Godfrey Norton (Godfrey) 1093 (8162) 2018-03-15 21:29:02
#161 Nofre Tete (noffi) 1093 (21921) 2018-03-16 00:29:12
#162 Silvia Kortmann (mikinsget) 1092 (10104) 2018-05-07 15:02:39
#163 Steve Vaillancourt (stvai2) 1092 (15041) 2018-05-11 12:16:00
#164 Eric (ExAstris) 1092 (26990) 2018-05-17 02:45:11
#165 Christophe BORELLY (cb34) 1092 (12358) 2018-06-06 21:19:29
#166 E41514050 (E41514050) 1091 (3870) 2018-07-07 10:43:28
#167 LQL (E41514067) 1091 (3180) 2018-07-08 09:58:38
#168 Random Dude (rnd) 1091 (95975) 2018-08-07 02:15:58
#169 Manfred Paul (manf) 1090 (14774) 2018-11-14 00:07:02
#170 mglarragan (mglarragan) 1090 (2091) 2019-01-14 22:28:39
#171 eschar (eschar) 1090 (3264) 2019-01-22 18:26:04
#172 simone (xseris) 1089 (8632) 2019-02-16 11:16:38
#173 LoneWolf219 (LoneWolf219) 1089 (12795) 2019-03-08 03:00:14
#174 whitecowboy (whitecowboy) 1089 (7446) 2019-03-08 04:27:53
#175 Lane Williams (planetlane) 1089 (23948) 2019-03-10 04:13:14
#176 E41614031 (E41614031) 1089 (7526) 2019-03-10 16:56:20
#177 schwuggel1337 (schwuggel1337) 1089 (7716) 2019-03-20 20:08:07
#178 Will (nitrow) 1089 (6807) 2019-03-21 15:52:11
#179 ykaridi (ykaridi) 1089 (7035) 2019-03-23 01:06:11
#180 Klaus (kumaus) 1089 (21415) 2019-04-01 16:13:17
#181 madness (madness) 1089 (15407) 2019-04-03 05:48:15
#182 Marco Cinelli (Snap) 1089 (28365) 2019-04-27 11:56:11
#183 Eugene (lim0n) 1089 (64198) 2019-05-03 15:02:08
#184 Mike (RogueRamblers) 1088 (29805) 2019-05-27 02:41:12
#185 ENOENT (ENOENT) 1088 (13478) 2019-05-31 15:29:48
#186 Christian (MarquisDeSud) 1088 (7848) 2019-06-03 09:59:11
#187 yult (yult) 1088 (12185) 2019-07-11 18:17:09
#188 gerdw (gerdw) 1088 (30489) 2019-07-12 21:00:11
#189 ajg (ludimus) 1088 (12114) 2019-07-22 19:05:47
#190 Stephan (Stephje1978) 1088 (26961) 2019-07-22 20:42:24
#191 Edward Broeder (onlyinabrz) 1087 (1087) 2019-10-09 07:49:05
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   +++    [22:10 - 20.10.2019] Greko solved the Level II challenge 'Homophonic Encryption — Part 3'    +++    [21:30 - 20.10.2019] Sgt4chan solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [20:34 - 20.10.2019] rnd solved the Level II challenge 'The T52 Sturgeon Challenge — Part 2'    +++    [13:11 - 20.10.2019] lim0n solved the Level II challenge 'Music Code — Part 2'    +++    [13:09 - 20.10.2019] lim0n solved the Level I challenge 'Music Code — Part 1'    +++