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Level III Challenges (66)

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

The SIGABA Challenge — Part 6

[lasry-31] - 0 users already solved this challenge.
 
 
 

The SIGABA was a highly secure encryption machine used by the US for strategic communications in WWII. As in the first five parts of this series of challenges, you are provided with a partial known-plaintext. However, in this part you get no information about the key.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2020-04-05 18:47
Maximum number of attempts for this challenge: 15

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The SIGABA Challenge — Part 5

[lasry-30] - 2 users already solved this challenge.
 
 
 

The SIGABA was a highly secure encryption machine used by the US for strategic communications in WWII. As in the first four parts of this series of challenges, you are provided with a partial known-plaintext, and some information about the key settings. However, in this part you get even less information about the key.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2020-03-26 13:03
Maximum number of attempts for this challenge: 15

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Rank User (#2) Achieved points (Global score) y-m-d - h:m:s

S Combes (jerva) 20000 (163132) 2020-03-26 13:34:12
Snake (snk) 20000 (175731) 2020-03-26 21:39:40
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The SIGABA Challenge — Part 4

[lasry-29] - 3 users already solved this challenge.
 
 
 

The SIGABA was a highly secure encryption machine used by the US for strategic communications in WWII. As in the first three parts of this series of challenges, you are provided with a partial known-plaintext, and some information about the key settings. However, in this part you get even less information about the key.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2020-03-17 20:15
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

S Combes (jerva) 20000 (163132) 2020-03-17 20:56:40
Snake (snk) 18390 (175731) 2020-03-21 17:08:22
D3d4lu5 (D3d4lu5) 16438 (338576) 2020-04-08 18:24:55
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The SIGABA Challenge — Part 3

[lasry-28] - 4 users already solved this challenge.
 
 
 

The SIGABA was a highly secure encryption machine used by the US for strategic communications in WWII. As in part 1 and part 2 of this series of challenges, you are provided with a partial known-plaintext, and some information about the key settings. However, in this part you get even less information about the key.
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2020-03-11 21:10
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#4) Achieved points (Global score) y-m-d - h:m:s

S Combes (jerva) 20000 (163132) 2020-03-11 22:43:44
Kurt Gebauer (Yokozuna) 18390 (216952) 2020-03-15 07:50:32
Snake (snk) 17290 (175731) 2020-03-21 19:19:23
D3d4lu5 (D3d4lu5) 16839 (338576) 2020-03-26 17:58:44
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The Heavy T52 Sturgeon Challenge — Part 3

[kopal-07] - 0 users already solved this challenge, 1 is working on it.
 
 
 

The Siemens and Halske T52 was a family of German teleprinter encryption devices used during WW2. This challenge is part of a series of new heavier challenges with T52. In this challenge, you need to recover a plaintext from one T52C ciphertext. The key is unknown.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2019-10-26 18:50
Maximum number of attempts for this challenge: 15

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   +++    [20:06 - 10.04.2020] bubblesort solved the Level II challenge 'Broadcasting and low exponent — RSA-Attack'    +++    [19:55 - 10.04.2020] bubblesort solved the Level I challenge 'M-138 — Part 1'    +++    [19:45 - 10.04.2020] bubblesort solved the Level I challenge 'Reserve Hand Procedure — Part 1'    +++    [19:17 - 10.04.2020] bubblesort solved the Level I challenge 'How do you become a big cryptographer?'    +++    [16:44 - 10.04.2020] bubblesort solved the Level I challenge 'From Russia with Love'    +++