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Level II Challenges (162)

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

Handycipher — Part 10

[kallick-25] - 1 user already solved this challenge.
 
 
 

Handycipher is a low-tech stream cipher, simple enough to permit pen-and-paper encrypting and decrypting of messages, while providing a significantly high level of security. Handycipher was first published in 2014 and further improved in 2015 and 2016. Part 10 of the Handycipher series presents the same challenge as Part 9 but with a different key choice. It is a ciphertext-only challenge.
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Published on: 2019-06-25 17:10
Maximum number of attempts for this challenge: 15

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Rank User (#1) Achieved points (Global score) y-m-d - h:m:s

D3d4lu5 (D3d4lu5) 2000 (363488) 2019-06-26 12:28:07
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