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Level II Challenges (137)

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

Christmas Challenge 2019: Differential Cryptanalysis — Part 1

[kopal-bender-01] - 3 users already solved this challenge.
 
 
 

This challenge series introduces in detail the handling of the differential cryptanalysis (DCA). In the first two challenges you have to decrypt encrypted images and enter the code shown in the images. The first challenge needs no filtering, as only valid plaintext-ciphertext pairs are delivered.
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Published on: 2019-12-22 21:04
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#3) Achieved points (Global score) y-m-d - h:m:s

Eugene (lim0n) 1660 (81028) 2019-12-26 16:31:43
Kurt Gebauer (Yokozuna) 1523 (184116) 2019-12-30 03:08:38
Dominik M. (Sgt. Pepper) 1456 (99375) 2020-01-03 18:30:14
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   +++    [22:03 - 21.01.2020] KryptoDash69 solved the Level I challenge 'Number Sequence'    +++    [14:16 - 21.01.2020] lim0n solved the Level II challenge 'A really long number sequence'    +++    [12:40 - 21.01.2020] Codebrecher solved the Level I challenge 'Grille Cipher'    +++    [11:02 - 21.01.2020] xmenxmen2777 solved the Level I challenge 'Original Caesar Cipher'    +++    [10:55 - 21.01.2020] Codebrecher solved the Level I challenge 'Number Sequence'    +++