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Level II Challenges (118)

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

Lunchtime Attack on the Fully Homomorphic Encryption Scheme

[ramaekers-01] - 39 users already solved this challenge, 1 is working on it.
 
 
 

The Fully Homomorphic Encryption Scheme by Gentry and Halevi turns out to be vulnerable to so called lunchtime attacks. In this challenge you have to perform such an attack.
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-01-14 00:00
Maximum number of attempts for this challenge: 25

All successful users of this challenge

Rank User (#39) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (185115) 2011-01-14 18:58:14
Nobody (nobody) 1824 (40618) 2011-01-15 20:51:56
Thomas Gonda (TomG) 1725 (36291) 2011-01-16 19:26:47
mischa (mmisc) 1324 (22426) 2011-02-16 22:47:37
#5 Sayali Deshpande (sayali84) 1244 (1244) 2011-04-06 06:52:00
#6 J. M. (jomandi) 1213 (113270) 2011-05-23 21:53:58
#7 Fabian Bendun (benfa) 1199 (8697) 2011-06-26 21:09:51
#8 Seth Kintigh (DarkFibre) 1193 (79471) 2011-07-12 23:50:36
#9 Viktor (Veselovský) 1186 (151602) 2011-08-08 20:07:01
#10 Daniel Fretwell (fretty) 1182 (30107) 2011-08-22 23:41:59
#11 Christian Matt (Luy) 1168 (9889) 2011-11-01 23:39:41
#12 Keith Randall (randall77) 1163 (31011) 2011-12-04 06:08:51
#13 Bart den Hartog (Bart13) 1160 (118984) 2011-12-26 18:49:57
#14 Nathan (Witten) 1159 (25326) 2011-12-30 18:27:47
#15 Thomas Lambert (lambert) 1147 (35237) 2012-04-14 15:41:53
#16 Kurt Gebauer (Yokozuna) 1146 (153663) 2012-04-25 17:17:50
#17 Michel Van Caneghem (vancan) 1146 (49719) 2012-05-06 16:41:41
#18 Luigi Tomelli (archstanton) 1140 (108345) 2012-07-21 16:36:17
#19 Hans Peter (hanspeter) 1129 (52256) 2013-01-11 23:50:43
#20 Almut (problelmo) 1123 (45992) 2013-06-04 17:12:18
#21 zahir mohsen moradi (ariobarzan) 1120 (99757) 2013-08-11 09:11:45
#22 Alexander (cruachan) 1118 (16051) 2013-10-28 21:09:37
#23 Em Doulgerakis (Greko) 1116 (124033) 2013-12-30 18:17:29
#24 Alain (Integral) 1114 (207924) 2014-02-10 10:07:39
#25 Michael Doucha (mdou) 1113 (13757) 2014-04-10 14:46:15
#26 Francisco Moraes (fmoraes) 1108 (90044) 2014-11-14 21:51:58
#27 Snake (snk) 1106 (77889) 2015-02-27 13:45:28
#28 S Combes (jerva) 1101 (99132) 2015-11-08 16:14:12
#29 Julia Bernotat (El Greco ) 1101 (81129) 2015-11-15 21:22:07
#30 Robert (rm) 1101 (56475) 2015-12-06 17:29:57
#31 Karl Schutt (günter) 1101 (41550) 2015-12-07 02:43:06
#32 Alain Collignon (vexilla72) 1100 (87833) 2016-01-29 14:41:03
#33 Claude Vaillancourt (Cl3v3r) 1096 (38351) 2016-11-17 01:56:44
#34 Nicolas (nicosPavlov) 1096 (151166) 2016-11-19 04:46:31
#35 chris (c2) 1094 (51973) 2017-03-29 23:05:52
#36 Dominik M. (Sgt. Pepper) 1094 (97919) 2017-04-12 00:20:56
#37 Kasia (kasia-tutej) 1093 (53366) 2017-06-16 20:35:08
#38 D3d4lu5 (D3d4lu5) 1093 (273573) 2017-07-18 18:37:06
#39 Random Dude (rnd) 1089 (88719) 2018-10-28 02:16:43
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