MysteryTwister C3
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Level III Challenges (74)

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

Substitution Cipher with Non-Prefix Codes
[muralidhar-01] - 1 user already solved this challenge, 3 are working on it.
 
 
 
Usually prefix-free codes are used for encryption because it makes the decryption process easier at the receiver's end. However, this challenge deals with a substitution cipher with non-prefix codes. This should be broken by performing a "ciphertext-only attack".
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Published on: 2011-06-15 11:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#1) Achieved points (Global score) y-m-d - h:m:s
Peter Mustermann (Gummiboot) 13959 (60285) 2013-01-14 07:53:12
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   +++    [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'    +++    [23:56 - 15.09.2021] theghost2 solved the Level I challenge 'Original Caesar Cipher'    +++