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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).

Monoalphabetic substitution with camouflage — Part 4

[veselovsky-12] - 36 users already solved this challenge, 5 are working on it.
 
 
 

Alice and Bob use the cipher as it had been described in part 3 of this challenge. Due to an error one message has been encrypted and sent twice. Does this help you to find out the shared key and enables you to decrypt a third message easily?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-12-21 13:50
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#36) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 200 (155287) 2011-12-21 23:01:38
Nathan (Witten) 200 (25326) 2011-12-22 11:32:59
Bart den Hartog (Bart13) 200 (116412) 2011-12-22 13:18:58
J. M. (jomandi) 150 (113270) 2011-12-22 18:04:13
#5 Wombat (Wombat) 106 (5822) 2012-01-08 13:06:15
#6 Martin Härterich (HaeM) 102 (15149) 2012-01-31 15:34:34
#7 Seth Kintigh (DarkFibre) 101 (79471) 2012-02-28 20:32:45
#8 Michael Möller (michaelm) 101 (117401) 2012-04-22 09:46:42
#9 Michel Van Caneghem (vancan) 101 (49719) 2012-06-16 19:15:24
#10 Kurt Gebauer (Yokozuna) 101 (120839) 2012-07-01 00:45:38
#11 Stepan (m1sterx) 100 (19165) 2012-08-01 22:31:58
#12 Keith Randall (randall77) 100 (31011) 2012-10-09 17:08:31
#13 Hans Peter (hanspeter) 100 (48115) 2012-11-09 18:25:03
#14 Almut (problelmo) 100 (45992) 2013-05-19 08:35:56
#15 Em Doulgerakis (Greko) 100 (109970) 2013-08-13 15:19:27
#16 zahir mohsen moradi (ariobarzan) 100 (99757) 2013-09-16 15:19:18
#17 chris_3stones (3stones) 100 (34472) 2013-12-29 19:40:12
#18 George (Theofanidis) 100 (88988) 2013-12-29 19:41:51
#19 Alain (Integral) 100 (198642) 2014-01-04 12:15:04
#20 Dusan (xxdradus) 100 (40134) 2014-02-17 08:19:36
#21 Lena Meier (aurelie) 100 (624) 2014-07-15 13:50:27
#22 Snake (snk) 100 (51689) 2014-07-16 12:27:56
#23 Francisco Moraes (fmoraes) 100 (90044) 2014-11-13 15:49:35
#24 HolgerK (HolgerK) 100 (23648) 2015-05-14 00:13:21
#25 Andreas Frerichs (Ossili) 100 (33026) 2015-07-12 20:53:08
#26 Robert (rm) 100 (56012) 2015-07-24 15:59:19
#27 E.T (Ertheb) 100 (54872) 2015-09-11 16:29:09
#28 Szabó Zoltán (szabo.z87) 100 (47990) 2015-12-24 19:02:32
#29 Rainer Zufall (kiekuk) 100 (42198) 2016-01-19 11:49:40
#30 Peter (Garnet) 100 (14133) 2016-07-11 16:42:53
#31 Bernhard Gruber (bgr) 100 (22631) 2016-08-24 14:07:30
#32 Norbert Biermann (Norbert) 100 (40024) 2016-09-06 10:48:43
#33 Nicolas (nicosPavlov) 100 (70954) 2016-11-21 12:53:04
#34 Alain Collignon (vexilla72) 100 (51007) 2016-11-22 20:25:37
#35 Dominik M. (Sgt. Pepper) 100 (43997) 2017-04-04 13:29:47
#36 D3d4lu5 (D3d4lu5) 100 (37685) 2017-07-15 18:22:47
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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'    +++