MysteryTwister C3
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Level II Challenges (93)

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

Extended Handycipher — Part 2

[kallick-05] - 1 user already solved this challenge.
 
 
 

Extended Handycipher is an enhancement of the newly designed cipher Handycipher, which permits pen-and-paper encrypting and decrypting, while providing a significantly high level of security. From the 905-character plaintext 229 characters somewhere in it are known.
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Published on: 2015-03-27 15:27
Maximum number of attempts for this challenge: 15

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Michael Möller (michaelm) 1185 (117401) 2015-10-23 09:07:20
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   +++    [10:48 - 30.03.2017] seltuna solved the Level I challenge 'Original Caesar Cipher'    +++    [23:45 - 29.03.2017] c2 solved the Level I challenge 'Classical Ciphers^3'    +++    [23:05 - 29.03.2017] c2 solved the Level II challenge 'Lunchtime Attack on the Fully Homomorphic Encryption Scheme'    +++    [18:20 - 29.03.2017] indojab solved the Level I challenge 'Original Caesar Cipher'    +++    [17:17 - 29.03.2017] indojab solved the Level I challenge 'Number Sequence'    +++