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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).

Broadcasting and low exponent — RSA-Attack

[brunner-01] - 140 users already solved this challenge, 2 are working on it.
 
 
 

A message was encrypted with three different moduli but the same public exponent.
Fortunately, you were able to catch the three different ciphertexts.
Are you able to recover the secret message?
Read more...

Click here to get to the corresponding forum topic to share your opinion.
Click here to download the challenge.
Click here to download the additional file of the challenge.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2011-07-22 20:00
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#140) Achieved points (Global score) y-m-d - h:m:s

Daniel Fretwell (fretty) 2000 (30107) 2011-07-22 20:34:43
mischa (mmisc) 2000 (22426) 2011-07-22 21:25:54
J. M. (jomandi) 2000 (113270) 2011-07-22 21:37:01
Seth Kintigh (DarkFibre) 2000 (79471) 2011-07-22 22:39:56
#5 Peter Mustermann (Gummiboot) 2000 (60285) 2011-07-23 15:36:23
#6 Robbt Neid (Das Tupel) 1824 (9403) 2011-07-24 01:27:01
#7 Simon Jakob (simon.jakob) 1725 (18714) 2011-07-25 02:38:53
#8 Armin Krauss (argh) 1725 (149821) 2011-07-25 19:41:13
#9 Viktor (Veselovský) 1523 (109843) 2011-07-30 02:18:39
#10 Dano (Dano) 1398 (14610) 2011-08-09 09:24:19
#11 kyprizel (kyprizel) 1391 (20795) 2011-08-10 17:08:57
#12 Flip (Flip) 1344 (31107) 2011-08-19 11:09:55
#13 Nicolas Golubovic (qll) 1337 (14919) 2011-08-20 20:14:53
#14 dbuq (dbuq) 1337 (22762) 2011-08-21 12:48:03
#15 David (aki321) 1337 (27482) 2011-08-21 13:13:07
#16 h3po (h3po) 1337 (20433) 2011-08-21 14:00:41
#17 The Killer (Killer) 1333 (42393) 2011-08-21 23:39:35
#18 Lu Kas (DrunkenPanda) 1333 (1835) 2011-08-22 00:29:11
#19 Ph il (audioPhil) 1333 (1935) 2011-08-22 00:34:20
#20 Cleyton Muto (accepted_rush) 1324 (5578) 2011-08-25 18:16:35
#21 Roland Jansen (roland) 1269 (17392) 2011-09-21 13:21:02
#22 Thomas Gonda (TomG) 1251 (33741) 2011-10-05 21:35:42
#23 Thomas Lambert (lambert) 1248 (38594) 2011-10-09 14:48:58
#24 marmotte (marmotte) 1244 (1549) 2011-10-14 18:59:04
#25 Christian Matt (Luy) 1236 (9889) 2011-10-22 20:55:54
#26 Bart den Hartog (Bart13) 1219 (116412) 2011-11-18 03:55:29
#27 Keith Randall (randall77) 1211 (31011) 2011-12-03 06:30:40
#28 Nathan (Witten) 1207 (25326) 2011-12-11 20:56:25
#29 Jan Temme (JaT3) 1203 (11694) 2011-12-22 00:21:39
#30 Alan Dixon (NickBourbaki) 1190 (7761) 2012-01-30 20:37:35
#31 Michel Van Caneghem (vancan) 1186 (49719) 2012-02-11 19:12:48
#32 Hans Peter (hanspeter) 1184 (48115) 2012-02-21 21:41:28
#33 Lukas (Kahla) 1182 (4719) 2012-02-29 15:58:13
#34 Govind Kalyankar (nakul22) 1181 (1181) 2012-03-03 08:28:09
#35 Artem (ArthaZz) 1179 (1280) 2012-03-12 02:13:23
#36 Luigi Tomelli (archstanton) 1179 (95549) 2012-03-13 09:42:50
#37 Kurt Gebauer (Yokozuna) 1175 (120839) 2012-03-29 10:19:05
#38 Steluta P. (maty_star) 1172 (5734) 2012-04-14 01:43:42
#39 Daniel Demmler (dd23) 1169 (8942) 2012-04-29 22:10:38
#40 Dusan (xxdradus) 1166 (40134) 2012-05-23 13:37:52
#41 George (Theofanidis) 1163 (88988) 2012-06-10 23:32:48
#42 zuben c3 (zuben-c3) 1160 (15014) 2012-06-28 09:06:51
#43 Ralf Stephan (rwst) 1160 (22735) 2012-07-01 11:02:29
#44 Christian (Etschupu) 1159 (31788) 2012-07-11 10:42:54
#45 Em Doulgerakis (Greko) 1157 (109970) 2012-07-19 23:28:49
#46 chris_3stones (3stones) 1157 (34472) 2012-07-26 07:49:47
#47 Stepan (m1sterx) 1152 (19165) 2012-09-06 09:32:15
#48 RPH (derichard) 1151 (27044) 2012-09-16 13:15:04
#49 Hank (hanky) 1150 (22859) 2012-09-25 22:42:50
#50 Hannes (Hartmann) 1150 (8680) 2012-09-27 21:16:18
#51 PRADEEP ROY (pmohanroy) 1148 (1148) 2012-10-15 08:15:26
#52 LokmanyaThilak (gs.thilak) 1148 (1148) 2012-10-15 08:19:26
#53 sevieron (sevieron) 1147 (1147) 2012-10-22 20:17:06
#54 E.T (Ertheb) 1147 (54872) 2012-10-26 22:30:03
#55 Friedrich Wiemer (asante) 1146 (5183) 2012-11-04 22:18:00
#56 PRADEEP ROY (PRADEEPROYCS265) 1146 (1146) 2012-11-10 06:51:32
#57 The Enigma (enigma) 1146 (14336) 2012-11-12 16:35:59
#58 Julia Werdelmann (jw) 1142 (10407) 2012-12-23 00:57:07
#59 Tron (Tron) 1142 (7381) 2012-12-23 21:00:43
#60 Claude Laveaux (claude.laveaux) 1142 (14504) 2012-12-30 22:47:05
#61 zahir mohsen moradi (ariobarzan) 1139 (99757) 2013-02-02 17:31:10
#62 mk (bilbobeutlin) 1136 (12340) 2013-03-20 08:53:40
#63 Velko Nikolov (staafl) 1135 (13467) 2013-04-12 15:35:54
#64 Almut (problelmo) 1134 (45992) 2013-04-29 06:32:11
#65 Wolfgang Weisser (wowmyst) 1130 (33108) 2013-07-12 23:39:14
#66 Philipp Hammer-Pohlau (phase2) 1129 (17981) 2013-07-22 18:46:49
#67 masam (jimboo) 1128 (18486) 2013-08-22 12:30:10
#68 Forrest Gump (Polyphem) 1127 (38763) 2013-08-27 16:50:44
#69 Steve (Samacian) 1127 (23704) 2013-09-06 06:19:21
#70 Gergely Simon (george314) 1126 (16555) 2013-09-27 20:37:57
#71 Alexander (cruachan) 1126 (16051) 2013-09-29 16:05:03
#72 Snake (snk) 1125 (51689) 2013-10-07 15:04:30
#73 Boris (Kaasu) 1125 (16566) 2013-10-18 19:21:59
#74 Swathi Pai (swathi3184) 1124 (3354) 2013-11-03 20:27:28
#75 Francisco Moraes (fmoraes) 1124 (90044) 2013-11-06 16:14:19
#76 Brad (braddrew) 1123 (15878) 2013-12-09 10:51:35
#77 jonathan (munz) 1122 (8954) 2013-12-30 04:57:50
#78 Csaba Fitzl (csaby) 1122 (6696) 2014-01-02 11:08:24
#79 Alain (Integral) 1122 (198642) 2014-01-06 17:26:10
#80 Pavel (haw) 1122 (22728) 2014-01-12 20:34:01
#81 Michael Doucha (mdou) 1120 (13757) 2014-02-18 15:24:44
#82 Duy Khanh Dau (khanh45a3kct) 1119 (5783) 2014-03-10 21:59:10
#83 hellman (hellman) 1119 (14862) 2014-03-13 10:05:36
#84 caesar ([caesar]) 1119 (10738) 2014-03-23 20:48:32
#85 Karl Schutt (günter) 1119 (34469) 2014-04-05 14:09:56
#86 Thomas Schmucker (dg) 1118 (26066) 2014-05-07 12:15:25
#87 Michael (pheenyx) 1117 (3840) 2014-05-23 22:57:25
#88 Igor (idipaolo) 1117 (9421) 2014-05-25 21:35:30
#89 julius gaius (julius) 1115 (25581) 2014-07-21 17:31:26
#90 Peter (51dc30ddc) 1115 (10916) 2014-07-23 23:42:03
#91 Robert (rm) 1115 (56012) 2014-08-08 18:26:25
#92 Konstantin (tempestadept) 1113 (3847) 2014-10-23 10:30:51
#93 Samyuktha Tina (samyusridhar) 1112 (2218) 2014-11-04 00:49:49
#94 Glaudson Ocampos (nashleon) 1112 (1820) 2014-11-05 01:25:18
#95 Julia Bernotat (El Greco ) 1112 (81129) 2014-11-26 18:54:07
#96 Kai Ludwig (TalentRaspel) 1111 (15704) 2015-01-12 22:36:12
#97 Claude Vaillancourt (Cl3v3r) 1110 (38251) 2015-01-16 23:03:12
#98 Shoukat (e195633) 1110 (10617) 2015-02-03 00:12:16
#99 Danny Higgins (hamster147) 1110 (12562) 2015-02-15 20:25:39
#100 Konstantin Golovan (SoulShaker) 1109 (14091) 2015-03-07 20:21:17
#101 R (r?) 1109 (6742) 2015-03-19 16:40:39
#102 Jeremy Chuang (jeremhh) 1109 (6643) 2015-03-19 16:43:34
#103 Rainer Zufall (kiekuk) 1109 (42198) 2015-04-01 09:53:07
#104 Erik (Erox) 1107 (20365) 2015-07-15 22:35:49
#105 Fabio (degrigis) 1106 (1206) 2015-07-18 15:07:23
#106 Javantea (Javantea) 1106 (38889) 2015-07-27 20:21:58
#107 J-L Morel (Rossignol) 1106 (23146) 2015-07-29 15:11:01
#108 Sean (Kavanaugh) 1106 (29143) 2015-08-13 20:11:59
#109 Ylona (Sirene) 1105 (4425) 2015-09-07 13:58:02
#110 Kokx (kokx) 1105 (4810) 2015-09-07 14:26:49
#111 S Combes (jerva) 1105 (77932) 2015-10-24 20:52:09
#112 Alain Collignon (vexilla72) 1104 (48599) 2015-10-30 17:18:06
#113 Szabó Zoltán (szabo.z87) 1104 (47990) 2015-11-09 14:26:42
#114 Martin (martinbucher) 1104 (22726) 2015-11-09 16:25:42
#115 Rainer (Rainer74) 1104 (8417) 2015-12-21 19:45:28
#116 Dominik M. (Sgt. Pepper) 1104 (34068) 2015-12-22 11:56:41
#117 T (Wagner) 1103 (9444) 2015-12-27 18:38:26
#118 Casaubon (cfreuden) 1103 (8515) 2016-01-13 17:08:09
#119 D (devilchn) 1103 (11142) 2016-02-05 14:00:40
#120 Andreas Frerichs (Ossili) 1102 (33026) 2016-02-19 12:06:59
#121 Marco Manfredi (mkk9901) 1102 (17686) 2016-03-14 15:06:45
#122 Vigneshwari Chandrasekaran (vigneshwari24) 1102 (1102) 2016-03-18 05:02:31
#123 Madhura Kaple (madhura) 1102 (1102) 2016-03-18 21:06:59
#124 Felix (Flix) 1102 (13612) 2016-04-12 22:10:21
#125 Peter (Garnet) 1101 (14033) 2016-04-21 12:01:51
#126 Wieland (wisch) 1101 (6400) 2016-05-30 21:08:29
#127 Norbert Biermann (Norbert) 1100 (40024) 2016-07-06 08:58:08
#128 Vlatiha Romanova (Vlatiha) 1100 (10223) 2016-08-04 11:38:43
#129 Flo (sealth) 1100 (13472) 2016-08-22 04:17:57
#130 Nicolas (nicosPavlov) 1099 (70954) 2016-09-29 17:40:27
#131 JoGo (JoGo) 1098 (11285) 2016-12-04 21:47:52
#132 Marcel (bene1512) 1098 (20896) 2017-01-07 19:23:10
#133 Michael (FoM) 1097 (13778) 2017-01-25 09:15:19
#134 Tristan1473 (Tristan1473) 1097 (17553) 2017-02-12 10:44:29
#135 Hans Joachim Girulat (joregi) 1097 (28462) 2017-02-26 00:56:53
#136 Mir Dim (mir0soft) 1097 (36990) 2017-03-14 08:15:29
#137 chris (c2) 1097 (43090) 2017-03-14 10:47:13
#138 Jane Alam Jan (jan876) 1097 (1097) 2017-03-22 10:28:28
#139 Tazmina Riya (Tazmina Riya) 1097 (1097) 2017-03-24 21:55:02
#140 Ajay Prashant (Ajay_Prashant) 1097 (2491) 2017-03-25 00:50:01
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