MysteryTwister C3
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Level III Challenges (59)

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

ElsieFour — Part 1

[rotthaler-01] - 1 user already solved this challenge.
 
 
 

ElsieFour combines ideas of modern RC4 stream cipher, historical Playfair cipher and plaintext-dependent keystreams. It can be computed manually. Part 1 is a partly-known-plaintext challenge which provides 2 messages that were encrypted with the same key.
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Published on: 2017-10-03 06:37
Maximum number of attempts for this challenge: 15

All successful users of this challenge

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

S Combes (jerva) 14436 (99132) 2018-06-18 22:14:19
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   +++    [16:11 - 20.10.2018] Eko115 solved the Level I challenge 'Original Caesar Cipher'    +++    [15:45 - 20.10.2018] Eko115 solved the Level I challenge 'Factorization Cipher — Part 1'    +++    [13:12 - 20.10.2018] xseris solved the Level I challenge 'Number Sequence — Part 5'    +++    [13:00 - 20.10.2018] xseris solved the Level I challenge 'Number Sequence — Part 4'    +++    [12:57 - 20.10.2018] xseris solved the Level I challenge 'Number Sequence — Part 3'    +++