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Level II Challenges (133)

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

A Cloaked Substitution Cipher — Part 2

[kallick-27] - 11 users already solved this challenge.
 
 
 

Like the MONOALPHABETIC SUBSTITUTION WITH CAMOUFLAGE series of challenges, this two-part challenge considers a modification of the classic simple substitution cipher achieved by randomly introducing decoy characters into the ciphertext in encryption which are then ignored in decryption. In part 2, the plaintext is first divided into two parts, then each part will be encrypted separately.
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Published on: 2019-08-25 19:26
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#11) Achieved points (Global score) y-m-d - h:m:s

D3d4lu5 (D3d4lu5) 2000 (297709) 2019-08-26 00:10:35
Viktor (Veselovský) 2000 (155163) 2019-08-26 01:43:23
Snake (snk) 2000 (83889) 2019-08-26 01:58:38
Eugene (lim0n) 2000 (55154) 2019-08-26 12:30:26
#5 Kurt Gebauer (Yokozuna) 2000 (177433) 2019-08-26 15:17:12
#6 George (Theofanidis) 1576 (112184) 2019-08-31 00:32:21
#7 Alain Collignon (vexilla72) 1523 (90800) 2019-09-02 11:16:49
#8 sarah b (silva) 1523 (26264) 2019-09-02 13:12:48
#9 Armin Krauss (argh) 1523 (188214) 2019-09-02 18:56:22
#10 Bart den Hartog (Bart13) 1502 (144081) 2019-09-03 08:22:15
#11 George Lasry (george4096) 1385 (302230) 2019-09-14 13:17:41
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   +++    [23:26 - 20.09.2019] rekondo solved the Level I challenge 'Original Caesar Cipher'    +++    [23:18 - 20.09.2019] rekondo solved the Level I challenge 'Number Sequence'    +++    [22:53 - 20.09.2019] ibex solved the Level I challenge 'Advent-Challenge — Part 1'    +++    [22:47 - 20.09.2019] ibex solved the Level I challenge 'Cryptanalysis Hacking Puzzles — Part 2'    +++    [22:40 - 20.09.2019] ibex solved the Level I challenge 'Number Sequence — Part 9'    +++