MysteryTwister C3
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Level II Challenges (160)

Page 16 of the challenges in Level II, ordered by date posted (the most recent appear first).

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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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

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

Michael Möller (michaelm) 1337 (256593) 2016-07-28 16:36:55
Alain (Integral) 1310 (207924) 2016-08-06 16:25:46
George Lasry (george4096) 1161 (422251) 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.
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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 20:08
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 (256593) 2016-07-13 21:09:45
Alain (Integral) 1310 (207924) 2016-08-06 14:10:50
George Lasry (george4096) 1161 (422251) 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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New Year's Greetings — Part 5

[gutgesell-05] - 15 users already solved this challenge, 1 is working on it.
 
 
 

This series consists of five parts which are based on each other and that will be getting more and more complicated with each part. This is the last part and teaches us something about the weaknesses of this method by improving it a little bit in some points.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2016-03-21 10:05
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

Szabó Zoltán (szabo.z87) 2000 (55604) 2016-03-21 19:18:08
Rainer Zufall (kiekuk) 1725 (56786) 2016-03-23 15:46:41
Viktor (Veselovský) 1576 (169444) 2016-03-26 13:20:45
Alain (Integral) 1502 (207924) 2016-03-29 14:51:54
#5 Bernhard Gruber (bgr) 1414 (22889) 2016-04-05 13:31:28
#6 Andreas Frerichs (Ossili) 1330 (33266) 2016-04-21 19:19:07
#7 zahir mohsen moradi (ariobarzan) 1330 (99757) 2016-04-21 21:37:32
#8 Christian (chrisadmin) 1212 (2019) 2016-07-31 14:45:51
#9 E.T (Ertheb) 1212 (81809) 2016-08-01 06:43:37
#10 Armin Krauss (argh) 1199 (206965) 2016-08-30 22:10:09
#11 Hans Peter (hanspeter) 1193 (52356) 2016-09-17 12:16:50
#12 D3d4lu5 (D3d4lu5) 1148 (363488) 2017-06-18 20:00:10
#13 Michael (FoM) 1117 (57794) 2019-02-02 09:30:42
#14 Dominik M. (Sgt. Pepper) 1115 (128575) 2019-03-25 13:53:22
#15 Derek Hatton (alfred_noble) 1107 (33998) 2020-02-18 00:58:18
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Weakened Granit — Part 3

[drobick-07] - 0 users already solved this challenge.
 
 
 

The challenges for the simplified GRANIT cipher, a method that can be done manually, serve as an exercise and use an intentionally simplified version of GRANIT.
Part 3 is a ciphertext-only challenge for which the second permutation key is known.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2015-09-24 07:37
Maximum number of attempts for this challenge: 15

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Weakened Granit — Part 2

[drobick-06] - 0 users already solved this challenge, 1 is working on it.
 
 
 

The challenges for the simplified GRANIT cipher, a method that can be done manually, serve as an exercise and use an intentionally simplified version of GRANIT.
Part 2 is a ciphertext-only challenge for which the first permutation key is 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: 2015-09-24 07:34
Maximum number of attempts for this challenge: 15

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   +++    [13:12 - 19.09.2021] Achidutzu solved the Level I challenge 'Enigma Messages'    +++    [11:38 - 16.09.2021] silva solved the Level II challenge 'Keyshanc — Part 2'    +++    [05:06 - 16.09.2021] gilotyna solved the Level I challenge 'Number Sequence — Part 2'    +++    [04:58 - 16.09.2021] gilotyna solved the Level I challenge 'Original Caesar Cipher'    +++    [04:49 - 16.09.2021] gilotyna solved the Level I challenge 'Number Sequence'    +++