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Level II Challenges (160)

Page 2 of the challenges in Level II, ordered by date posted (the most recent appear first).

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?
Read more...

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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: 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 (422251) 2021-02-19 14:58:08
Kurt Gebauer (Yokozuna) 1307 (282608) 2021-03-11 11:39:16
Eugene (lim0n) 1269 (195334) 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 (195334) 2021-01-30 17:18:00
Kurt Gebauer (Yokozuna) 2000 (282608) 2021-01-30 17:40:00
George Lasry (george4096) 1660 (422251) 2021-02-02 19:40:00
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The SZ42 Challenge — Part 9

[kopal-22] - 6 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the ninth challenge in a series of 13 level-2 challenges with the SZ42. In this "setting" challenge you are provided with only one ciphertext; the patterns for all the wheels are known as well as the starting positions for the CHI wheels. Can you find the starting positions for both the MU and PSI wheels and decrypt the ciphertext?
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: 2020-12-19 16:31
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

Kurt Gebauer (Yokozuna) 2000 (282608) 2020-12-19 18:28:53
Eugene (lim0n) 2000 (195334) 2020-12-20 11:05:51
H. Lautenschlager (helmi) 1444 (57600) 2021-01-01 11:23:23
George Lasry (george4096) 1200 (422251) 2021-05-27 21:20:34
#5 zuben c3 (zuben-c3) 1183 (44417) 2021-07-25 13:03:09
#6 George (Theofanidis) 1178 (132517) 2021-08-16 02:18:13
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The SZ42 Challenge — Part 8

[kopal-21] - 7 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the eighth challenge in a series of 13 level-2 challenges with the SZ42. In this "setting" challenge you are provided with only one ciphertext; the patterns for all the wheels are known as well as the starting positions for the CHI and PSI wheels. Can you find the starting positions for the MU wheels and decrypt the ciphertext?
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: 2020-10-31 16:06
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#7) Achieved points (Global score) y-m-d - h:m:s

Eugene (lim0n) 2000 (195334) 2020-10-31 20:54:38
Kurt Gebauer (Yokozuna) 2000 (282608) 2020-10-31 21:34:32
H. Lautenschlager (helmi) 2000 (57600) 2020-11-01 00:38:54
Snake (snk) 1456 (187783) 2020-11-11 21:46:53
#5 George Lasry (george4096) 1373 (422251) 2020-11-21 17:53:47
#6 George (Theofanidis) 1174 (132517) 2021-07-15 05:11:39
#7 zuben c3 (zuben-c3) 1172 (44417) 2021-07-24 18:20:49
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The SZ42 Challenge — Part 7

[kopal-20] - 6 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the seventh challenge in a series of 13 level-2 challenges with the SZ42. In this "setting" challenge you are provided with only one ciphertext; the patterns for all the wheels are known as well as the starting positions for the CHI and MU wheels. Can you find the starting positions for the PSI wheels and decrypt the ciphertext?
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: 2020-10-27 16:54
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

Kurt Gebauer (Yokozuna) 2000 (282608) 2020-10-27 19:33:17
Eugene (lim0n) 2000 (195334) 2020-10-28 06:31:49
George Lasry (george4096) 1353 (422251) 2020-11-21 17:18:37
H. Lautenschlager (helmi) 1333 (57600) 2020-11-26 19:24:05
#5 George (Theofanidis) 1173 (132517) 2021-07-18 15:54:49
#6 zuben c3 (zuben-c3) 1172 (44417) 2021-07-23 19:05:20
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   +++    [16:58 - 27.09.2021] Surtees solved the Level I challenge 'Number Sequence — Part 2'    +++    [14:53 - 27.09.2021] jenniferdecastro solved the Level I challenge 'A hidden word'    +++    [14:28 - 27.09.2021] Mercer solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++    [09:52 - 26.09.2021] CRYbaby solved the Level I challenge 'How do you become a big cryptographer?'    +++    [17:29 - 25.09.2021] gemmath solved the Level I challenge 'Letter to the Templars — Part 1'    +++