MysteryTwister C3
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Level II Challenges (158)

Page 15 of the challenges in Level II, ordered by date posted (the most recent appear first).

ASAC — A Strong(er) ADFGVX Cipher — Part 2

[fendt-02] - 1 user already solved this challenge.
 
 
 

This series consists of 5 challenges based on each other. It introduces a new three-step cipher called ASAC, which is a modified version of ADFGVX. Part 2 uses only the first two steps of the cipher.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-07-09 19:08
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

George Lasry (george4096) 1155 (399565) 2017-08-01 00:01:51
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ASAC — A Strong(er) ADFGVX Cipher — Part 1

[fendt-01] - 16 users already solved this challenge, 1 is working on it.
 
 
 

This series consists of 5 challenges based on each other. It introduces a new three-step cipher called ASAC, which is a modified version of ADFGVX. Part 1 is meant as an introduction and uses only the first step of ASAC.
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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: 2016-07-09 19:05
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#16) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (206965) 2016-07-09 20:51:02
zahir mohsen moradi (ariobarzan) 2000 (99757) 2016-07-09 23:39:20
Snake (snk) 2000 (187783) 2016-07-10 18:57:24
Robert (rm) 1613 (56475) 2016-07-13 20:20:15
#5 Kurt Gebauer (Yokozuna) 1613 (282608) 2016-07-13 20:55:56
#6 Alain (Integral) 1576 (207924) 2016-07-15 09:41:37
#7 Julia Bernotat (El Greco ) 1433 (81129) 2016-07-23 00:33:55
#8 Em Doulgerakis (Greko) 1266 (193799) 2016-09-10 08:42:36
#9 Marc (rcll0891) 1204 (24004) 2016-12-05 19:50:21
#10 Alain Collignon (vexilla72) 1204 (123666) 2016-12-06 16:18:38
#11 Danny Higgins (hamster147) 1179 (39638) 2017-02-26 18:09:02
#12 George Lasry (george4096) 1155 (399565) 2017-07-31 21:27:03
#13 D3d4lu5 (D3d4lu5) 1152 (363488) 2017-08-22 18:15:07
#14 Bart den Hartog (Bart13) 1143 (148936) 2017-11-29 00:40:19
#15 Eugene (lim0n) 1108 (178540) 2020-04-25 16:41:52
#16 Dominik M. (Sgt. Pepper) 1101 (128575) 2021-05-08 16:25:36
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Weakened Handycipher — Part 6

[kallick-20] - 5 users already solved this challenge.
 
 
 

The Weakened Handycipher challenges serve as an exercise and use an intentionally weakened version of Handycipher. Part 6 is the same as Part 3, but uses an improved version of the cipher. It is ciphertext-only.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-06-28 20:12
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

Alain (Integral) 1307 (207924) 2016-08-07 12:09:26
Michael Möller (michaelm) 1292 (253196) 2016-08-14 17:29:02
George Lasry (george4096) 1161 (399565) 2017-05-29 01:02:28
Nicolas (nicosPavlov) 1136 (257791) 2018-02-18 11:22:27
#5 D3d4lu5 (D3d4lu5) 1123 (363488) 2018-11-01 00:50:59
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Weakened Handycipher — Part 5

[kallick-19] - 5 users already solved this challenge.
 
 
 

The Weakened Handycipher challenges serve as an exercise and use an intentionally weakened version of Handycipher. Part 5 is the same as Part 2, but uses an improved version of the cipher. It is ciphertext-only, but you are given some partial information about 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.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-06-28 20:10
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

Michael Möller (michaelm) 1337 (253196) 2016-07-28 16:36:55
Alain (Integral) 1310 (207924) 2016-08-06 16:25:46
George Lasry (george4096) 1161 (399565) 2017-05-29 21:15:02
Nicolas (nicosPavlov) 1136 (257791) 2018-02-18 11:18:20
#5 D3d4lu5 (D3d4lu5) 1123 (363488) 2018-10-31 22:03:45
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Weakened Handycipher — Part 4

[kallick-18] - 5 users already solved this challenge.
 
 
 

The Weakened Handycipher challenges serve as an exercise and use an intentionally weakened version of Handycipher. Part 4 is the same as Part 1, but uses an improved version of the cipher. You are given the first 1,009 characters of the plaintext, and some partial information about 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.
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: 2016-06-28 20:08
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

Michael Möller (michaelm) 1414 (253196) 2016-07-13 21:09:45
Alain (Integral) 1310 (207924) 2016-08-06 14:10:50
George Lasry (george4096) 1161 (399565) 2017-05-30 16:00:56
Nicolas (nicosPavlov) 1137 (257791) 2018-02-12 14:08:00
#5 D3d4lu5 (D3d4lu5) 1124 (363488) 2018-10-31 06:18:10
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