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Level II Challenges (160)

Page 8 of the challenges in Level II, ordered by date posted (the most recent appear first).

The T52 Sturgeon Challenge — Part 6

[lasry-19] - 6 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 challenges with T52. In this challenge, you need to recover the plaintext from ten "in-depth" ciphertexts built with T52c. 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: 2019-08-10 17:30
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

D3d4lu5 (D3d4lu5) 1725 (363488) 2019-08-13 00:21:56
Kurt Gebauer (Yokozuna) 1613 (282608) 2019-08-15 14:53:37
Snake (snk) 1181 (187783) 2020-03-22 22:48:36
Nicolas (nicosPavlov) 1158 (257791) 2020-08-01 16:24:05
#5 Mike (RogueRamblers) 1131 (81614) 2021-07-02 02:45:43
#6 Michael Möller (michaelm) 1128 (256593) 2021-08-23 20:16:44
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The T52 Sturgeon Challenge — Part 5

[lasry-18] - 6 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 challenges with T52. In this challenge, you need to recover the plaintext from ten "in-depth" ciphertexts built with T52ab. The key is partially known.
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: 2019-08-10 17:30
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

D3d4lu5 (D3d4lu5) 1824 (363488) 2019-08-12 16:35:58
Kurt Gebauer (Yokozuna) 1660 (282608) 2019-08-13 23:24:00
Snake (snk) 1181 (187783) 2020-03-20 17:07:07
Nicolas (nicosPavlov) 1158 (257791) 2020-08-05 14:47:04
#5 Mike (RogueRamblers) 1131 (81614) 2021-07-09 02:40:39
#6 Michael Möller (michaelm) 1129 (256593) 2021-08-05 20:35:50
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The T52 Sturgeon Challenge — Part 4

[lasry-17] - 10 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 challenges with T52. In this challenge, you need to recover the plaintext only from a T52ab ciphertext. The key is partially known.
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: 2019-07-22 23:20
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#10) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 1725 (282608) 2019-07-25 18:49:21
D3d4lu5 (D3d4lu5) 1385 (363488) 2019-08-11 20:05:00
Alain Collignon (vexilla72) 1256 (123666) 2019-10-01 18:59:20
Luigi Tomelli (archstanton) 1203 (127538) 2019-12-22 13:48:06
#5 Michael Möller (michaelm) 1201 (256593) 2019-12-28 11:47:25
#6 Snake (snk) 1177 (187783) 2020-03-19 22:22:52
#7 Dominik M. (Sgt. Pepper) 1176 (128575) 2020-03-27 15:39:42
#8 Nicolas (nicosPavlov) 1157 (257791) 2020-07-21 11:44:51
#9 Scombes (jerva) 1152 (266541) 2020-09-08 17:05:30
#10 Mike (RogueRamblers) 1130 (81614) 2021-07-07 03:17:55
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The T52 Sturgeon Challenge — Part 3

[lasry-16] - 12 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 challenges with T52. In this challenge, you need to recover the plaintext only from a T52d ciphertext. The key is partially known.
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: 2019-07-22 23:17
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#12) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (282608) 2019-07-23 07:38:03
D3d4lu5 (D3d4lu5) 1824 (363488) 2019-07-24 06:19:13
Alain Collignon (vexilla72) 1256 (123666) 2019-10-01 14:41:57
Random Dude (rnd) 1238 (103645) 2019-10-21 21:48:09
#5 Luigi Tomelli (archstanton) 1204 (127538) 2019-12-19 13:52:50
#6 H. Lautenschlager (helmi) 1203 (57600) 2019-12-22 20:03:03
#7 Michael Möller (michaelm) 1180 (256593) 2020-03-08 15:55:33
#8 Snake (snk) 1178 (187783) 2020-03-18 22:24:04
#9 Nicolas (nicosPavlov) 1158 (257791) 2020-07-19 04:58:23
#10 Scombes (jerva) 1151 (266541) 2020-09-13 20:41:17
#11 Mike (RogueRamblers) 1131 (81614) 2021-06-17 01:02:56
#12 George (Theofanidis) 1130 (132517) 2021-06-30 11:28:23
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The T52 Sturgeon Challenge — Part 2

[lasry-15] - 15 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 challenges with T52. In this challenge, you need to recover the plaintext only from a T52c ciphertext. The key is partially known.
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: 2019-07-22 23:15
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#15) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (282608) 2019-07-23 00:55:17
D3d4lu5 (D3d4lu5) 1824 (363488) 2019-07-24 06:18:14
Alain Collignon (vexilla72) 1256 (123666) 2019-10-01 11:47:41
Random Dude (rnd) 1238 (103645) 2019-10-20 20:34:27
#5 H. Lautenschlager (helmi) 1212 (57600) 2019-12-01 22:01:22
#6 Luigi Tomelli (archstanton) 1208 (127538) 2019-12-11 18:04:06
#7 Michael Möller (michaelm) 1193 (256593) 2020-01-19 18:06:17
#8 Snake (snk) 1178 (187783) 2020-03-18 22:23:05
#9 Dominik M. (Sgt. Pepper) 1175 (128575) 2020-03-30 23:52:11
#10 Nobody (nobody) 1164 (42945) 2020-06-04 12:23:23
#11 Nicolas (nicosPavlov) 1158 (257791) 2020-07-15 14:49:31
#12 Scombes (jerva) 1152 (266541) 2020-09-10 07:36:41
#13 Mike (RogueRamblers) 1131 (81614) 2021-06-16 00:47:43
#14 George (Theofanidis) 1131 (132517) 2021-06-20 14:04:45
#15 zuben c3 (zuben-c3) 1127 (44417) 2021-08-25 21:11:59
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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'    +++