MysteryTwister C3
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Level II Challenges (153)

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

The SZ42 Challenge — Part 4

[kopal-17] - 7 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the fourth challenge in a series of 13 level-2 challenges with the SZ42. In this "setting" challenge you are provided with only one ciphertext and the patterns for CHI1 and CHI2 wheels are known. Can you find the starting positions for CHI1 and CHI2?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2020-08-29 23:25
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

Kurt Gebauer (Yokozuna) 2000 (274906) 2020-08-30 00:14:50
Eugene (lim0n) 2000 (169787) 2020-08-30 12:42:34
H. Lautenschlager (helmi) 2000 (56270) 2020-08-30 12:53:38
George Lasry (george4096) 2000 (369910) 2020-08-30 17:19:16
#5 Armin Krauss (argh) 1725 (206664) 2020-09-01 21:57:52
#6 Nicolas (nicosPavlov) 1613 (257791) 2020-09-03 05:10:49
#7 Snake (snk) 1576 (187650) 2020-09-04 18:19:41
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The SZ42 Challenge — Part 3

[kopal-16] - 7 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the third challenge in a series of 13 level-2 challenges with the SZ42. Here, you are provided with 2 in-depth ciphertexts and a limitation is used. Can you recover the plaintexts?
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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: 2020-08-15 21:26
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

Kurt Gebauer (Yokozuna) 2000 (274906) 2020-08-15 23:28:29
Nicolas (nicosPavlov) 2000 (257791) 2020-08-16 07:01:56
H. Lautenschlager (helmi) 2000 (56270) 2020-08-16 11:31:06
Eugene (lim0n) 2000 (169787) 2020-08-16 12:35:37
#5 Dominik M. (Sgt. Pepper) 2000 (127349) 2020-08-16 19:10:39
#6 Armin Krauss (argh) 1725 (206664) 2020-08-17 21:42:37
#7 George Lasry (george4096) 1576 (369910) 2020-08-21 21:02:59
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The SZ42 Challenge — Part 2

[kopal-15] - 8 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the second challenge in a series of 13 level-2 challenges with the SZ42. Here, you are provided with 4 in-depth ciphertexts and a limitation is used. Can you recover the plaintexts?
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: 2020-08-05 15:44
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#8) Achieved points (Global score) y-m-d - h:m:s

George Lasry (george4096) 2000 (369910) 2020-08-05 17:05:39
Armin Krauss (argh) 2000 (206664) 2020-08-05 20:46:23
Eugene (lim0n) 2000 (169787) 2020-08-05 21:28:35
Dominik M. (Sgt. Pepper) 2000 (127349) 2020-08-05 23:18:08
#5 Kurt Gebauer (Yokozuna) 2000 (274906) 2020-08-05 23:56:11
#6 H. Lautenschlager (helmi) 1485 (56270) 2020-08-15 12:53:52
#7 Nicolas (nicosPavlov) 1485 (257791) 2020-08-15 15:15:41
#8 S Combes (jerva) 1292 (204567) 2020-09-20 20:55:34
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The SZ42 Challenge — Part 1

[kopal-14] - 8 users already solved this challenge.
 
 
 

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the first challenge in a series of 13 Level-2 challenges with the SZ42. Here, you are provided with 8 in-depth ciphertexts. Can you recover the plaintexts?
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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: 2020-07-22 23:20
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#8) Achieved points (Global score) y-m-d - h:m:s

Eugene (lim0n) 2000 (169787) 2020-07-23 16:28:56
Armin Krauss (argh) 2000 (206664) 2020-07-23 19:34:09
Dominik M. (Sgt. Pepper) 1613 (127349) 2020-07-27 14:04:16
Nicolas (nicosPavlov) 1576 (257791) 2020-07-28 11:57:43
#5 George Lasry (george4096) 1547 (369910) 2020-07-29 10:48:53
#6 Kurt Gebauer (Yokozuna) 1523 (274906) 2020-07-30 17:36:35
#7 H. Lautenschlager (helmi) 1373 (56270) 2020-08-13 20:47:47
#8 S Combes (jerva) 1270 (204567) 2020-09-20 10:56:05
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Lightweight Introduction to Lattices — Part 3

[dimitrov-esslinger-03] - 20 users already solved this challenge.
 
 
 

This is part 3 of the challenge series about lattice-based cryptography schemes. This challenge introduces an encryption scheme which uses systems of linear equations. Can you decrypt a message without knowing the key?
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Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2020-07-16 12:58
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#20) Achieved points (Global score) y-m-d - h:m:s

Dominik M. (Sgt. Pepper) 2000 (127349) 2020-07-16 13:39:08
S (Zyphe) 2000 (13361) 2020-07-16 14:13:42
Kurt Gebauer (Yokozuna) 2000 (274906) 2020-07-16 14:34:01
H. Lautenschlager (helmi) 2000 (56270) 2020-07-16 14:42:10
#5 Snake (snk) 2000 (187650) 2020-07-16 15:07:38
#6 Viktor (Veselovský) 2000 (169244) 2020-07-16 22:00:42
#7 Eugene (lim0n) 2000 (169787) 2020-07-16 22:58:02
#8 Armin Krauss (argh) 2000 (206664) 2020-07-17 12:56:08
#9 Alain Collignon (vexilla72) 1824 (122384) 2020-07-17 18:39:14
#10 George (Theofanidis) 1824 (119711) 2020-07-17 19:54:10
#11 Silvia Kortmann (mikinsget) 1824 (16459) 2020-07-18 10:43:30
#12 Em Doulgerakis (Greko) 1725 (137134) 2020-07-19 11:13:43
#13 Nofre Tete (noffi) 1613 (26357) 2020-07-20 20:20:30
#14 DS (DS8279) 1576 (29732) 2020-07-22 12:14:13
#15 Derek Hatton (alfred_noble) 1406 (33998) 2020-08-01 17:46:10
#16 Marco Cinelli (Snap) 1324 (34364) 2020-08-18 16:34:40
#17 Tristan1473 (Tristan1473) 1315 (20432) 2020-08-22 12:53:25
#18 Polaris (Polaris) 1305 (32963) 2020-08-26 01:34:05
#19 Michael (FoM) 1201 (53292) 2020-12-21 03:51:15
#20 D3d4lu5 (D3d4lu5) 1198 (359988) 2020-12-29 19:46:17
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   +++    [20:03 - 16.01.2021] Cubitus solved the Level I challenge 'Original Caesar Cipher'    +++    [16:31 - 16.01.2021] V5November solved the Level I challenge 'Autokey Cipher'    +++    [15:44 - 16.01.2021] itnomad solved the Level I challenge 'Number Sequence — Part 8'    +++    [14:12 - 16.01.2021] itnomad solved the Level I challenge 'Advent-Challenge — Part 1'    +++    [11:33 - 16.01.2021] Rossignol solved the Level II challenge 'Double Column Transposition — Part 2'    +++