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).

Weakened Handycipher — Part 1

[kallick-09] - 8 users already solved this challenge.
 
 
 

The challenges for the weakened Handycipher serve as an exercise and use an intentionally weakened version of Handycipher. Part 1 is a partially-known-plaintext challenge with a helping additional information.
Handycipher is a newly designed cipher to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security.
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Published on: 2015-05-13 11:47
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#8) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (120839) 2015-05-13 12:44:32
Julia Bernotat (El Greco ) 1613 (81129) 2015-05-17 18:02:13
Armin Krauss (argh) 1485 (149821) 2015-05-22 19:32:50
Alain (Integral) 1362 (198642) 2015-06-05 15:01:59
#5 Michael Möller (michaelm) 1235 (117401) 2015-08-15 16:25:41
#6 zahir mohsen moradi (ariobarzan) 1229 (99757) 2015-08-22 12:40:27
#7 Karl Schutt (günter) 1167 (34469) 2016-03-07 05:20:49
#8 Em Doulgerakis (Greko) 1156 (109970) 2016-05-18 13:14:59
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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'    +++