MysteryTwister C3
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Level III Challenges (72)

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

ElsieFour — Part 1

[rotthaler-01] - 2 users already solved this challenge, 1 is working on it.
 
 
 

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 (#2) Achieved points (Global score) y-m-d - h:m:s

S Combes (jerva) 14436 (170300) 2018-06-18 22:14:19
Michael Möller (michaelm) 14182 (238219) 2018-10-29 13:09:48
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