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Level II Challenges (96)

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

CMEA 1

[stamp-10] - 33 users already solved this challenge, 3 are working on it.
 
 
 

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 100 known plaintext blocks given.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2010-12-06 00:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#33) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 1613 (155287) 2010-12-10 15:02:30
Nobody (nobody) 1286 (40618) 2011-01-24 10:53:04
Wolfgang Weisser (wowmyst) 1231 (33108) 2011-03-15 00:16:19
J. M. (jomandi) 1179 (113270) 2011-07-29 13:13:25
#5 Flip (Flip) 1174 (31107) 2011-08-22 21:41:30
#6 Viktor (Veselovský) 1147 (113116) 2012-03-06 14:00:03
#7 Seth Kintigh (DarkFibre) 1147 (79471) 2012-03-16 01:39:15
#8 Michel Van Caneghem (vancan) 1144 (49719) 2012-04-10 17:39:00
#9 Keith Randall (randall77) 1144 (31011) 2012-04-13 00:57:47
#10 Luigi Tomelli (archstanton) 1136 (95549) 2012-08-11 17:17:48
#11 Kurt Gebauer (Yokozuna) 1130 (120839) 2012-11-15 10:14:40
#12 Bart den Hartog (Bart13) 1126 (116412) 2013-02-01 01:07:10
#13 zahir mohsen moradi (ariobarzan) 1120 (99757) 2013-07-15 07:56:47
#14 Francisco Moraes (fmoraes) 1116 (90044) 2013-11-21 22:48:53
#15 George (Theofanidis) 1115 (88988) 2013-12-06 11:51:21
#16 Alain (Integral) 1115 (198642) 2013-12-24 16:29:32
#17 Em Doulgerakis (Greko) 1115 (109970) 2013-12-24 17:03:18
#18 S Combes (jerva) 1104 (77932) 2015-03-22 12:08:21
#19 Karl Schutt (günter) 1104 (34469) 2015-04-21 17:46:45
#20 Julia Bernotat (El Greco ) 1099 (81129) 2016-01-31 20:40:34
#21 Dominik M. (Sgt. Pepper) 1099 (43997) 2016-02-24 15:44:54
#22 Naman Bagga (namanb) 1099 (2311) 2016-03-13 19:32:24
#23 chris_3stones (3stones) 1096 (34472) 2016-10-10 20:37:46
#24 Nicolas (nicosPavlov) 1095 (71054) 2016-11-26 17:53:20
#25 Javantea (Javantea) 1095 (38889) 2016-11-30 08:06:40
#26 Alain Collignon (vexilla72) 1095 (51007) 2016-12-11 10:37:08
#27 Tristan1473 (Tristan1473) 1094 (17553) 2017-03-05 08:30:38
#28 chris (c2) 1094 (51973) 2017-03-19 08:47:50
#29 Swapnil Gaikwad (swapnilmg) 1094 (1094) 2017-03-22 07:52:31
#30 Ajay Prashant (Ajay_Prashant) 1094 (2491) 2017-03-23 04:28:20
#31 Mir Dim (mir0soft) 1094 (49971) 2017-03-27 11:47:35
#32 george lasry (george4096) 1093 (281491) 2017-06-22 23:03:23
#33 D3d4lu5 (D3d4lu5) 1093 (57702) 2017-07-25 15:14:22
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