MysteryTwister C3
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Level II Challenges (153)

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

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 (169244) 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 (206664) 2016-08-30 22:10:09
#11 Hans Peter (hanspeter) 1193 (52356) 2016-09-17 12:16:50
#12 D3d4lu5 (D3d4lu5) 1148 (359988) 2017-06-18 20:00:10
#13 Michael (FoM) 1117 (53292) 2019-02-02 09:30:42
#14 Dominik M. (Sgt. Pepper) 1115 (127349) 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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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 07:37
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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Spirale — Part 3

[allard-03] - 3 users already solved this challenge.
 
 
 

Spirale is a OTP cipher designed to be simply performed by hand.
Part 3 is a ciphertext-only challenge with a 949-letter ciphertext.
In this part, two of the four keys are equal to the keys of the first two parts.
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: 2015-08-23 19:08
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

S Combes (jerva) 1378 (204567) 2015-09-13 15:43:29
J-L Morel (Rossignol) 1143 (41038) 2017-01-19 15:27:30
George Lasry (george4096) 1129 (369910) 2017-08-21 21:46:21
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Spirale — Part 2

[allard-02] - 4 users already solved this challenge.
 
 
 

Spirale is a OTP cipher designed to be simply performed by hand.
Part 2 is a ciphertext-only challenge with a 659-letter ciphertext.
This part uses the same four keys for encryption as part 1 does.
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: 2015-08-23 19:05
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#4) Achieved points (Global score) y-m-d - h:m:s

S Combes (jerva) 1378 (204567) 2015-09-12 21:15:06
J-L Morel (Rossignol) 1143 (41038) 2017-01-19 15:23:12
George Lasry (george4096) 1129 (369910) 2017-08-21 21:06:46
Kurt Gebauer (Yokozuna) 1103 (274906) 2020-01-28 12:25:55
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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'    +++