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Level III Challenges (57)

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

CMEA 2

[stamp-11] - 19 users already solved this challenge.
 
 
 

CMEA is a block cipher and was one of the 4 cryptographic primitives of the mobile communications network in the US. It is your challenge to perform a known-plaintext attack on CMEA with 40 known plaintext blocks given.
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Published on: 2010-12-06 00:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#19) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 17412 (149821) 2010-12-14 17:00:33
Wolfgang Weisser (wowmyst) 15101 (33108) 2011-03-15 20:30:10
J. M. (jomandi) 14472 (113270) 2011-08-07 11:09:20
Flip (Flip) 14396 (31107) 2011-09-07 18:30:19
#5 Viktor (Veselovský) 14086 (109843) 2012-03-11 13:41:15
#6 Seth Kintigh (DarkFibre) 14050 (79471) 2012-04-11 00:54:45
#7 Luigi Tomelli (archstanton) 13882 (95549) 2012-10-02 16:30:24
#8 Kurt Gebauer (Yokozuna) 13846 (120839) 2012-11-17 15:01:27
#9 zahir mohsen moradi (ariobarzan) 13696 (99757) 2013-07-15 07:57:55
#10 Francisco Moraes (fmoraes) 13631 (90044) 2013-11-24 23:47:34
#11 Alain (Integral) 13617 (198642) 2013-12-26 12:16:10
#12 George (Theofanidis) 13616 (88988) 2013-12-27 21:39:19
#13 Em Doulgerakis (Greko) 13614 (109970) 2014-01-01 00:00:59
#14 Bart den Hartog (Bart13) 13551 (116412) 2014-06-04 12:37:55
#15 S Combes (jerva) 13451 (77932) 2015-04-02 14:39:05
#16 Julia Bernotat (El Greco ) 13370 (81129) 2016-02-01 16:13:43
#17 Nicolas (nicosPavlov) 13305 (70954) 2016-11-27 18:02:06
#18 Javantea (Javantea) 13304 (38889) 2016-11-30 10:01:22
#19 chris (c2) 13282 (41296) 2017-03-22 08:35:23
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