MysteryTwister C3
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Level II Challenges (158)

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

SIGABA CSP-889 — Part 2

[kopal-26] - 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 270 and 120 characters.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2021-06-01 13:35
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

S Combes (jerva) 1824 (242717) 2021-06-03 06:45:44
George Lasry (george4096) 1613 (399565) 2021-06-05 14:08:00
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SIGABA CSP-889 — Part 1

[kopal-25] - 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 320 and 120 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 13:18
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

S Combes (jerva) 2000 (242717) 2021-06-02 10:40:32
George Lasry (george4096) 1725 (399565) 2021-06-03 22:50:04
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Wheatstone Cryptograph — Part 2

[madness-05] - 3 users already solved this challenge.
 
 
 

The Wheatstone Cryptograph is a simple device that resembles a clock with two hands. For each hand there is a ring of symbols. In this challenge the key is a random permutation of the english alphabet. Are you able to decrypt the given ciphertext?
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Click here to get to the corresponding forum topic to share your opinion.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2021-05-21 15:10
Maximum number of attempts for this challenge: 30

All successful users of this challenge

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

Eugene (lim0n) 2000 (178540) 2021-05-21 19:56:41
Kurt Gebauer (Yokozuna) 2000 (282608) 2021-05-22 01:51:39
George Lasry (george4096) 1547 (399565) 2021-05-27 21:18:02
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The SZ42 Challenge — Part 11

[kopal-24] - 3 users already solved this challenge, 1 is working on it.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the eleventh challenge in a series of 13 level-2 challenges with the SZ42. In this "key breaking" challenge you are provided with one ciphertext and the corresponding plaintext. Can you find the wheel patterns?
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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: 2021-01-30 15:48
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

George Lasry (george4096) 1385 (399565) 2021-02-19 14:58:08
Kurt Gebauer (Yokozuna) 1307 (282608) 2021-03-11 11:39:16
Eugene (lim0n) 1269 (178540) 2021-04-01 08:15:04
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The SZ42 Challenge — Part 10

[kopal-23] - 3 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the tenth challenge in a series of 13 level-2 challenges with the SZ42. In this "key breaking" challenge you are provided with one ciphertext and the corresponding plaintext. Can you find the wheel patterns?
Update January 2021: The starting positions for the CHI wheels were added.
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: 2021-01-30 15:40
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) 2000 (178540) 2021-01-30 17:18:00
Kurt Gebauer (Yokozuna) 2000 (282608) 2021-01-30 17:40:00
George Lasry (george4096) 1660 (399565) 2021-02-02 19:40:00
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   +++    [20:39 - 21.06.2021] mglarragan solved the Level I challenge 'Enigma Messages with Repeated Letters — Part 4'    +++    [20:28 - 21.06.2021] mglarragan solved the Level I challenge 'Enigma Messages with Repeated Letters — Part 2'    +++    [20:14 - 21.06.2021] mglarragan solved the Level I challenge 'Enigma Messages with Repeated Letters — Part 3'    +++    [01:44 - 21.06.2021] RogueRamblers solved the Level II challenge 'The T52 Sturgeon Challenge — Part 8'    +++    [01:26 - 21.06.2021] RogueRamblers solved the Level II challenge 'The T52 Sturgeon Challenge — Part 12'    +++