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Level II Challenges (146)

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

The SIGABA Challenge — Part 1

[lasry-26] - 5 users already solved this challenge, 1 is working on it.
 
 
 

The SIGABA was a highly secure encryption machine used by the US for strategic communications in WWII. It is believed that the German codebreakers were unable to make any inroads against SIGABA. In this part of the series of challenges, you are provided with a partial known-plaintext, and some information about the key settings.
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Published on: 2020-02-29 12:29
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

S Combes (jerva) 2000 (163132) 2020-02-29 17:14:45
Dominik M. (Sgt. Pepper) 1576 (124749) 2020-03-06 02:41:04
Kurt Gebauer (Yokozuna) 1523 (260506) 2020-03-08 05:38:58
Snake (snk) 1373 (182494) 2020-03-21 14:15:47
#5 D3d4lu5 (D3d4lu5) 1349 (343788) 2020-03-26 17:55:38
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   +++    [00:16 - 12.08.2020] Polaris solved the Level I challenge 'Image Noise'    +++    [00:10 - 12.08.2020] Polaris solved the Level I challenge 'From Russia with Love'    +++    [16:38 - 11.08.2020] kshepherd solved the Level I challenge 'Snow White and the seven dwarfs'    +++    [03:02 - 11.08.2020] noother solved the Level III challenge 'RSA Factoring Challenge: RSA-250'    +++    [02:53 - 11.08.2020] noother solved the Level II challenge 'RSA Factoring Challenge: RSA-210'    +++