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Level III Challenges (74)

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

SIGABA CSP-2900 — Part 3

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

The SIGABA CSP-2900 was a highly secure encryption machine used by the US for strategic communication in WWII. In this series of challenges, you are provided with a ciphertext and a partially-known plaintext, here with the length of 200 and 100 characters.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2021-07-31 18:03
Maximum number of attempts for this challenge: 15

All successful users of this challenge

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

Scombes (jerva) 20000 (266541) 2021-08-01 09:36:13
George Lasry (george4096) 19236 (422251) 2021-08-02 13:04:44
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SIGABA CSP-889 — Part 3

[kopal-27] - 2 users already solved this challenge.
 
 
 

The SIGABA CSP-889 was a highly secure encryption machine used by the US for strategic communication in WWII. In this series of challenges, you are provided with a ciphertext and a partially-known plaintext, here with the length of 200 and 100 characters.
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: 2021-06-01 13:45
Maximum number of attempts for this challenge: 15

All successful users of this challenge

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

George Lasry (george4096) 20000 (422251) 2021-06-01 21:12:15
Scombes (jerva) 20000 (266541) 2021-06-02 12:03:55
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The Heavy T52 Sturgeon Challenge — Part 9

[kopal-13] - 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 a plaintext from a T52E ciphertext and a crib. The key is partially known.
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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: 2020-04-30 13:03
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

Michael Möller (michaelm) 15245 (256593) 2020-07-22 07:22:48
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The Heavy T52 Sturgeon Challenge — Part 8

[kopal-12] - 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 a T52D ciphertext and a crib. The key is unknown.
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: 2020-04-24 16:56
Maximum number of attempts for this challenge: 15

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The Heavy T52 Sturgeon Challenge — Part 7

[kopal-11] - 3 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 a T52AB ciphertext and a crib. The key is unknown.
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: 2020-04-23 12:30
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

Michael Möller (michaelm) 16645 (256593) 2020-05-10 20:53:41
Nicolas (nicosPavlov) 14822 (257791) 2020-09-15 14:25:59
Scombes (jerva) 14427 (266541) 2021-01-10 14:34:22
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   +++    [22:12 - 18.10.2021] NikM solved the Level I challenge 'Wheatstone Cryptograph — Part 1'    +++    [18:43 - 18.10.2021] TaRaSS solved the Level I challenge 'Affine Codes / Modulo Arithmetic with N / Extended Euclid'    +++    [17:10 - 18.10.2021] tAnAs solved the Level I challenge 'Letter to the Templars — Part 2'    +++    [16:42 - 18.10.2021] TaRaSS solved the Level I challenge 'Beaver Code'    +++    [16:23 - 18.10.2021] TaRaSS solved the Level I challenge 'Number Sequence — Part 2'    +++