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Level I Challenges (75)

Page 1 of the challenges in Level I, ordered by date posted (the most recent appear first).

Trifid Cipher

[gysler-02] - 93 users already solved this challenge, 6 are working on it.
 
 
 

Two scatterbrained professors exchange messages that have been encrypted with the Trifid cipher. Unfortunately, one of them lost the second of three layers. Will he nevertheless be able to decrypt the message he received from his colleague?
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Published on: 2013-10-28 20:49
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#93) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 200 (155287) 2013-10-29 00:11:55
Kurt Gebauer (Yokozuna) 200 (120839) 2013-10-29 01:01:21
Viktor (Veselovský) 200 (113116) 2013-10-29 01:09:57
Snake (snk) 200 (51689) 2013-10-29 11:28:48
#5 H. Lautenschlager (helmi) 200 (18162) 2013-10-29 12:02:52
#6 Hans Peter (hanspeter) 200 (48115) 2013-10-29 13:43:41
#7 zahir mohsen moradi (ariobarzan) 200 (99757) 2013-10-29 14:26:29
#8 Michael Möller (michaelm) 200 (117401) 2013-10-29 17:20:19
#9 E.T (Ertheb) 200 (54872) 2013-10-29 17:44:41
#10 J. M. (jomandi) 150 (113270) 2013-10-30 10:00:11
#11 Hannes Nötzli (Faust) 150 (4781) 2013-10-30 16:54:48
#12 Alexander (cruachan) 150 (16051) 2013-10-30 18:04:02
#13 Bart den Hartog (Bart13) 150 (116412) 2013-10-30 19:22:24
#14 Forrest Gump (Polyphem) 133 (38763) 2013-10-31 00:45:09
#15 Steve (Samacian) 133 (23704) 2013-10-31 12:47:01
#16 Bernhard Gruber (bgr) 125 (22631) 2013-10-31 21:24:25
#17 KW (qwer*) 125 (13753) 2013-11-01 20:21:19
#18 George (Theofanidis) 120 (88988) 2013-11-01 23:38:52
#19 Sebastian Slupina (Grandwizard) 120 (6901) 2013-11-02 15:41:22
#20 Luigi Tomelli (archstanton) 111 (95549) 2013-11-06 10:19:08
#21 Holti (Holti) 108 (6035) 2013-11-09 18:06:25
#22 Shimi (elyimmy) 107 (207) 2013-11-11 19:41:34
#23 j.h. (haegarq) 106 (11696) 2013-11-14 13:54:06
#24 Joost (Joost) 103 (2653) 2013-11-26 00:24:15
#25 Dusan (xxdradus) 103 (40134) 2013-11-26 14:56:21
#26 A. S. (er1709) 103 (1608) 2013-12-02 22:19:53
#27 Em Doulgerakis (Greko) 101 (109970) 2014-01-06 15:49:01
#28 Alain (Integral) 101 (198642) 2014-01-12 17:28:03
#29 Steffen (Mandelbaum) 101 (101) 2014-01-15 17:49:49
#30 Kim H. S. (tenchijin) 101 (21386) 2014-01-22 13:23:09
#31 Nascha (Nascha) 101 (101) 2014-02-08 13:25:03
#32 Moritz Stocker (Trismegistos) 101 (2471) 2014-02-10 13:08:15
#33 Sascha (The Hoddich) 101 (4350) 2014-03-03 10:08:31
#34 Silvija H. (Hafner) 101 (401) 2014-03-15 22:45:59
#35 Laura (Weltenwandlerin) 101 (1004) 2014-03-18 17:10:04
#36 Felix (codeflx) 101 (1915) 2014-03-22 16:26:54
#37 masam (jimboo) 101 (18486) 2014-03-24 19:29:16
#38 Bertold (bk) 101 (8972) 2014-04-03 21:09:12
#39 Karl Schutt (günter) 101 (34469) 2014-04-04 21:03:11
#40 edventscher (edventscher) 101 (101) 2014-04-10 10:17:36
#41 Siggi Kraus (Kruxi) 101 (701) 2014-04-26 13:50:58
#42 Luca (jellyluke) 101 (2140) 2014-04-30 19:40:37
#43 Michael S (Scherbius) 101 (403) 2014-05-04 22:41:46
#44 Aivaras (TaiAivaras) 100 (500) 2014-05-20 17:37:42
#45 Michel Van Caneghem (vancan) 100 (49719) 2014-05-24 08:46:20
#46 Tina (BTina) 100 (1500) 2014-05-30 05:48:37
#47 Francisco Moraes (fmoraes) 100 (90044) 2014-06-28 16:56:00
#48 Jay Kay (Merty) 100 (3726) 2014-07-06 16:00:18
#49 Robert (rm) 100 (56012) 2014-07-31 23:06:07
#50 Julia Bernotat (El Greco ) 100 (81129) 2014-07-31 23:33:04
#51 Michael (miklzbr) 100 (100) 2014-08-19 22:16:20
#52 Andreas Frerichs (Ossili) 100 (33026) 2014-09-02 21:12:59
#53 Darío Lafuente (darolaf) 100 (100) 2014-09-23 21:34:15
#54 Lane Williams (planetlane) 100 (6348) 2014-11-24 20:40:18
#55 Heather Williams (planetheather) 100 (1927) 2014-11-24 21:08:07
#56 Julia Werdelmann (jw) 100 (10407) 2014-12-05 00:09:47
#57 Pavel (haw) 100 (22728) 2014-12-06 21:33:06
#58 ab (ababab) 100 (200) 2014-12-14 20:34:50
#59 Max Mustermann (MustermM) 100 (6661) 2014-12-16 16:54:47
#60 HolgerK (HolgerK) 100 (23648) 2014-12-22 23:55:19
#61 S Combes (jerva) 100 (77932) 2015-01-21 20:23:25
#62 Vlatiha Romanova (Vlatiha) 100 (10223) 2015-02-10 13:51:06
#63 Claude Vaillancourt (Cl3v3r) 100 (38251) 2015-02-12 18:12:03
#64 Elena (Lifeindeath) 100 (2798) 2015-02-19 23:37:59
#65 micaman (micaman) 100 (4233) 2015-02-21 00:03:31
#66 Muendo (muendo) 100 (3501) 2015-02-24 09:47:11
#67 Tim Fink (Magellan) 100 (4626) 2015-03-11 03:20:32
#68 Patrick Renz (tarantulla) 100 (2027) 2015-03-31 13:37:56
#69 Rainer Zufall (kiekuk) 100 (42198) 2015-04-07 15:06:19
#70 Thomas Gonda (TomG) 100 (33741) 2015-04-14 21:29:41
#71 Hans Joachim Girulat (joregi) 100 (28462) 2015-04-21 09:26:49
#72 Michael Ammon (Ammonym) 100 (7719) 2015-06-20 22:48:44
#73 Mikaela Bergstedt (Millie82) 100 (200) 2015-07-07 11:56:47
#74 Alain Collignon (vexilla72) 100 (51007) 2015-10-07 11:50:30
#75 S (Zyphe) 100 (8324) 2015-10-24 20:23:34
#76 Szabó Zoltán (szabo.z87) 100 (47990) 2015-11-01 05:22:58
#77 Dominik M. (Sgt. Pepper) 100 (43997) 2015-12-16 10:04:10
#78 Ines (bufo01) 100 (3612) 2016-02-22 23:18:13
#79 Peter (Garnet) 100 (14133) 2016-03-13 23:26:06
#80 Stephan (stegi) 100 (801) 2016-07-09 20:51:47
#81 J-L Morel (Rossignol) 100 (23146) 2016-07-10 17:33:57
#82 Norbert Biermann (Norbert) 100 (40024) 2016-07-31 22:47:59
#83 Nicolas (nicosPavlov) 100 (70954) 2016-10-07 12:37:59
#84 Hajoe (Tintin-Muc) 100 (5628) 2016-10-24 23:01:50
#85 Yass (Yass) 100 (300) 2016-11-04 21:15:39
#86 Michael (FoM) 100 (13778) 2016-11-29 23:48:37
#87 Marcel (bene1512) 100 (20896) 2016-12-29 18:07:38
#88 Nofre Tete (noffi) 100 (10522) 2016-12-29 18:09:10
#89 Anggia (Vuleedazula) 100 (1608) 2017-03-07 12:39:46
#90 Mir Dim (mir0soft) 100 (48879) 2017-03-21 07:20:36
#91 chris (c2) 100 (51973) 2017-03-28 19:50:48
#92 Daniel Walder (ibex) 100 (14372) 2017-05-11 23:33:18
#93 D3d4lu5 (D3d4lu5) 100 (37685) 2017-06-18 03:41:37
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   +++    [13:26 - 22.07.2017] Godfrey solved the Level I challenge 'Number Sequence — Part 2'    +++    [13:24 - 22.07.2017] Theofanidis solved the Level II challenge 'RSA Factoring Challenge: RSA-220'    +++    [13:21 - 22.07.2017] Godfrey solved the Level I challenge 'Original Caesar Cipher'    +++    [13:12 - 22.07.2017] Godfrey solved the Level I challenge 'Number Sequence'    +++    [13:03 - 22.07.2017] Akonia12 solved the Level II challenge 'RSA: Two different keys — same ciphertext'    +++