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Level III Challenges (74)

Page 3 of the challenges in Level III, ordered by date posted (the most recent appear first).

The SIGABA Challenge — Part 4

[lasry-29] - 5 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.
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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 (#5) Achieved points (Global score) y-m-d - h:m:s

Scombes (jerva) 20000 (266541) 2020-03-17 20:56:40
Snake (snk) 18390 (187783) 2020-03-21 17:08:22
D3d4lu5 (D3d4lu5) 16438 (363488) 2020-04-08 18:24:55
Nicolas (nicosPavlov) 14472 (257791) 2020-11-17 09:28:05
#5 Em Doulgerakis (Greko) 14143 (193799) 2021-05-10 11:47:05
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The SIGABA Challenge — Part 3

[lasry-28] - 6 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 (#6) Achieved points (Global score) y-m-d - h:m:s

Scombes (jerva) 20000 (266541) 2020-03-11 22:43:44
Kurt Gebauer (Yokozuna) 18390 (282608) 2020-03-15 07:50:32
Snake (snk) 17290 (187783) 2020-03-21 19:19:23
D3d4lu5 (D3d4lu5) 16839 (363488) 2020-03-26 17:58:44
#5 Nicolas (nicosPavlov) 14732 (257791) 2020-08-24 04:19:56
#6 Em Doulgerakis (Greko) 14164 (193799) 2021-04-18 22:38:29
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The Heavy T52 Sturgeon Challenge — Part 3

[kopal-07] - 2 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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Rank User (#2) Achieved points (Global score) y-m-d - h:m:s

Scombes (jerva) 14126 (266541) 2020-12-29 18:50:16
George Lasry (george4096) 14125 (399565) 2020-12-31 12:43:06
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The Heavy T52 Sturgeon Challenge — Part 2

[kopal-06] - 0 users already solved this challenge.
 
 
 

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 T52AB ciphertext. The key is unknown.
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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: 2019-10-09 12:36
Maximum number of attempts for this challenge: 15

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The Heavy T52 Sturgeon Challenge — Part 1

[kopal-05] - 1 user already solved this challenge.
 
 
 

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 the plaintexts from T52D ciphertexts "in-depth". The key is unknown.
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Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2019-09-30 17:57
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#1) Achieved points (Global score) y-m-d - h:m:s

George Lasry (george4096) 14576 (399565) 2020-04-25 19:03:07
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   +++    [01:47 - 02.08.2021] jerva solved the Level II challenge 'SIGABA CSP-2900 — Part 1'    +++    [00:40 - 02.08.2021] mochiorochi solved the Level I challenge 'Beaver Code'    +++    [22:51 - 01.08.2021] mochiorochi solved the Level I challenge 'A hidden word'    +++    [22:46 - 01.08.2021] mochiorochi solved the Level II challenge 'Letter to the Templars — Part 3'    +++    [22:05 - 01.08.2021] mochiorochi solved the Level I challenge 'Letter to the Templars — Part 2'    +++