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Level II Challenges (132)

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

Weakened Handycipher — Part 1

[kallick-09] - 15 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 (#15) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (175433) 2015-05-13 12:44:32
Julia Bernotat (El Greco ) 1613 (81129) 2015-05-17 18:02:13
Armin Krauss (argh) 1485 (185115) 2015-05-22 19:32:50
Alain (Integral) 1362 (207924) 2015-06-05 15:01:59
#5 Michael Möller (michaelm) 1235 (175129) 2015-08-15 16:25:41
#6 zahir mohsen moradi (ariobarzan) 1229 (99757) 2015-08-22 12:40:27
#7 Karl Schutt (günter) 1167 (41550) 2016-03-07 05:20:49
#8 Em Doulgerakis (Greko) 1156 (124033) 2016-05-18 13:14:59
#9 George Lasry (george4096) 1128 (299488) 2017-05-28 22:01:31
#10 Nicolas (nicosPavlov) 1119 (151166) 2018-01-19 02:26:13
#11 D3d4lu5 (D3d4lu5) 1111 (295709) 2018-10-26 07:56:33
#12 Viktor (Veselovský) 1108 (153262) 2019-02-22 19:24:31
#13 Snake (snk) 1108 (79889) 2019-03-06 13:55:44
#14 Danny Higgins (hamster147) 1107 (34095) 2019-05-02 09:21:44
#15 Random Dude (rnd) 1106 (90929) 2019-06-25 00:12:17
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