MysteryTwister C3

Follow us: Facebook Twitter

Level II Challenges (149)

Page 1 of the challenges in Level II, ordered by date posted (the most recent appear first).

Spirale — Part 1

[allard-01] - 4 users already solved this challenge, 2 are working on it.

Spirale is a OTP cipher designed to be simple to implement by hand. It is resilient to errors as they have only a local effect without obscuring all the ciphertext.
Part 1 is a partly-known plaintext challenge with a 314-letter ciphertext. The first 75 letters of the plaintext are known.
Part 2 of this series uses the same four keys as this one.

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 19:04
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 (170300) 2015-09-12 21:12:42
J-L Morel (Rossignol) 1143 (37723) 2017-01-19 15:14:20
George Lasry (george4096) 1129 (351773) 2017-08-21 20:56:27
Kurt Gebauer (Yokozuna) 1103 (266506) 2020-01-28 12:24:14
You must be logged in to solve the challenge
Pages [1] 1 Show All  
powered by the CrypTool project  CrypTool


   +++    [18:33 - 26.09.2020] wisch solved the Level I challenge 'Hill Cipher with Sudoku Key'    +++    [17:55 - 26.09.2020] Polaris solved the Level II challenge 'Enigma Part 2'    +++    [17:54 - 26.09.2020] arenas solved the Level I challenge 'Double Columnar Transposition'    +++    [16:57 - 26.09.2020] Lemmynator solved the Level I challenge 'Hill Cipher with Sudoku Key'    +++    [14:46 - 26.09.2020] loeppi74 solved the Level I challenge 'A hidden word — Part 2'    +++