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Level II Challenges (142)

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

Holographic Encryption — Part 1

[pavillon-01] - 6 users already solved this challenge.
 
 
 

Holographic encryption can be performed by employing encryption masks which alter the field before propagation. This makes the image unrecognizable when recorded. You are given three holograms that represent the cipher image and two corrupted encryption masks.
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Published on: 2017-04-07 22:25
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#6) Achieved points (Global score) y-m-d - h:m:s

Viktor (Veselovský) 1660 (163827) 2017-04-11 09:41:56
Armin Krauss (argh) 1456 (194414) 2017-04-19 17:59:59
Bart den Hartog (Bart13) 1198 (148936) 2017-09-20 03:18:52
D3d4lu5 (D3d4lu5) 1124 (322138) 2019-07-21 16:07:09
#5 Eugene (lim0n) 1120 (102582) 2019-11-08 18:32:36
#6 Kurt Gebauer (Yokozuna) 1117 (214952) 2020-02-03 08:16:13
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   +++    [23:57 - 31.03.2020] lösbär solved the Level I challenge 'Number Sequence — Part 9'    +++    [23:39 - 31.03.2020] lösbär solved the Level I challenge 'Number Sequence — Part 6'    +++    [23:23 - 31.03.2020] ace2 solved the Level I challenge 'Cascading Encryption — Part 1/3'    +++    [18:24 - 31.03.2020] Rossignol solved the Level II challenge 'Homophonic Encryption — Part 4'    +++    [17:40 - 31.03.2020] lösbär solved the Level I challenge 'A hidden word — Part 2'    +++