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Level II Challenges (139)

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

Double Column Transposition — Part 1

[lasry-06] - 23 users already solved this challenge, 2 are working on it.
 
 
 

In this part of a series of mid-level Double Column Transposition challenges keys shorter than 20 allow you to attack this simple, yet secure cipher.
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Published on: 2014-04-04 17:36
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#23) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (190214) 2014-04-05 01:37:34
Alain (Integral) 1433 (207924) 2014-04-17 23:21:30
Kurt Gebauer (Yokozuna) 1423 (189263) 2014-04-19 04:35:32
Viktor (Veselovský) 1341 (159163) 2014-05-02 23:14:41
#5 Bart den Hartog (Bart13) 1284 (148936) 2014-05-25 01:07:09
#6 Francisco Moraes (fmoraes) 1238 (90044) 2014-07-02 20:13:56
#7 Luigi Tomelli (archstanton) 1234 (113164) 2014-07-08 18:49:09
#8 Snake (snk) 1234 (93659) 2014-07-09 12:13:43
#9 Peter Mustermann (Gummiboot) 1229 (60285) 2014-07-15 16:29:20
#10 Erich (ErichSt) 1204 (4862) 2014-09-02 15:01:55
#11 George (Theofanidis) 1185 (114632) 2014-11-01 10:52:27
#12 Dusan (xxdradus) 1165 (40336) 2015-02-04 18:13:42
#13 Szabó Zoltán (szabo.z87) 1133 (55604) 2016-01-25 12:19:54
#14 Vidmantas (vidluk) 1131 (2533) 2016-02-29 22:13:48
#15 Marc (rcll0891) 1130 (24004) 2016-03-07 00:02:04
#16 Robert (rm) 1128 (56475) 2016-04-16 00:12:16
#17 Alain Collignon (vexilla72) 1121 (112294) 2016-10-17 14:47:34
#18 Nicolas (nicosPavlov) 1120 (151166) 2016-11-12 17:01:24
#19 Hans Joachim Girulat (joregi) 1116 (36278) 2017-03-08 00:49:01
#20 D3d4lu5 (D3d4lu5) 1112 (302572) 2017-07-28 23:13:19
#21 Heemany (heemany) 1103 (1103) 2018-10-01 07:35:32
#22 Random Dude (rnd) 1102 (98550) 2018-11-22 22:50:28
#23 Mike (RogueRamblers) 1098 (47681) 2019-09-03 23:13:51
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   +++    [00:41 - 20.02.2020] madness solved the Level II challenge 'Hybrid Encryption I'    +++    [23:54 - 19.02.2020] Veselovský solved the Level II challenge 'The LoRa Cipher: Logic Randomness — Part 1'    +++    [21:20 - 19.02.2020] DariaS solved the Level I challenge 'A hidden word'    +++    [16:33 - 19.02.2020] He3 solved the Level I challenge 'Cryptanalysis Hacking Puzzles — Part 2'    +++    [10:38 - 19.02.2020] Lurkrul solved the Level II challenge 'Broadcasting and low exponent — RSA-Attack'    +++