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Level II Challenges (133)

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] - 191 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 (#191) 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 (188214) 2011-07-25 19:41:13
#9 Viktor (Veselovský) 1523 (155163) 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 (17607) 2011-09-21 13:21:02
#22 Thomas Gonda (TomG) 1251 (36291) 2011-10-05 21:35:42
#23 marmotte (marmotte) 1244 (1549) 2011-10-14 18:59:04
#24 Christian Matt (Luy) 1236 (9889) 2011-10-22 20:55:54
#25 Bart den Hartog (Bart13) 1219 (144081) 2011-11-18 03:55:29
#26 Keith Randall (randall77) 1211 (31011) 2011-12-03 06:30:40
#27 Nathan (Witten) 1207 (25326) 2011-12-11 20:56:25
#28 Jan Temme (JaT3) 1203 (11694) 2011-12-22 00:21:39
#29 Alan Dixon (NickBourbaki) 1190 (7761) 2012-01-30 20:37:35
#30 Michel Van Caneghem (vancan) 1186 (49719) 2012-02-11 19:12:48
#31 Hans Peter (hanspeter) 1184 (52256) 2012-02-21 21:41:28
#32 Lukas (Kahla) 1182 (4719) 2012-02-29 15:58:13
#33 Govind Kalyankar (nakul22) 1181 (1181) 2012-03-03 08:28:09
#34 Artem (ArthaZz) 1179 (1280) 2012-03-12 02:13:23
#35 Luigi Tomelli (archstanton) 1179 (108345) 2012-03-13 09:42:50
#36 Kurt Gebauer (Yokozuna) 1175 (177433) 2012-03-29 10:19:05
#37 Steluta P. (maty_star) 1172 (5734) 2012-04-14 01:43:42
#38 Daniel Demmler (dd23) 1169 (8942) 2012-04-29 22:10:38
#39 Dusan (xxdradus) 1166 (40236) 2012-05-23 13:37:52
#40 George (Theofanidis) 1163 (112184) 2012-06-10 23:32:48
#41 zuben c3 (zuben-c3) 1160 (24853) 2012-06-28 09:06:51
#42 Ralf Stephan (rwst) 1160 (25229) 2012-07-01 11:02:29
#43 Christian (Etschupu) 1159 (31788) 2012-07-11 10:42:54
#44 Em Doulgerakis (Greko) 1157 (124033) 2012-07-19 23:28:49
#45 chris_3stones (3stones) 1157 (37759) 2012-07-26 07:49:47
#46 Stepan (m1sterx) 1152 (19165) 2012-09-06 09:32:15
#47 RPH (derichard) 1151 (27044) 2012-09-16 13:15:04
#48 Hank (hanky) 1150 (22859) 2012-09-25 22:42:50
#49 Hannes (Hartmann) 1150 (8680) 2012-09-27 21:16:18
#50 PRADEEP ROY (pmohanroy) 1148 (1148) 2012-10-15 08:15:26
#51 LokmanyaThilak (gs.thilak) 1148 (1148) 2012-10-15 08:19:26
#52 sevieron (sevieron) 1147 (1147) 2012-10-22 20:17:06
#53 E.T (Ertheb) 1147 (81809) 2012-10-26 22:30:03
#54 Friedrich Wiemer (asante) 1146 (5183) 2012-11-04 22:18:00
#55 PRADEEP ROY (PRADEEPROYCS265) 1146 (1146) 2012-11-10 06:51:32
#56 The Enigma (enigma) 1146 (14336) 2012-11-12 16:35:59
#57 Julia Werdelmann (jw) 1142 (10407) 2012-12-23 00:57:07
#58 Tron (Tron) 1142 (7381) 2012-12-23 21:00:43
#59 Claude Laveaux (claude.laveaux) 1142 (14504) 2012-12-30 22:47:05
#60 zahir mohsen moradi (ariobarzan) 1139 (99757) 2013-02-02 17:31:10
#61 mk (bilbobeutlin) 1136 (12340) 2013-03-20 08:53:40
#62 Velko Nikolov (staafl) 1135 (13467) 2013-04-12 15:35:54
#63 Almut (problelmo) 1134 (45992) 2013-04-29 06:32:11
#64 Wolfgang Weisser (wowmyst) 1130 (33108) 2013-07-12 23:39:14
#65 Philipp Hammer-Pohlau (phase2) 1129 (17981) 2013-07-22 18:46:49
#66 masam (jimboo) 1128 (18687) 2013-08-22 12:30:10
#67 Forrest Gump (Polyphem) 1127 (38763) 2013-08-27 16:50:44
#68 Steve (Samacian) 1127 (23804) 2013-09-06 06:19:21
#69 Gergely Simon (george314) 1126 (16555) 2013-09-27 20:37:57
#70 Alexander (cruachan) 1126 (16051) 2013-09-29 16:05:03
#71 Snake (snk) 1125 (86245) 2013-10-07 15:04:30
#72 Boris (Kaasu) 1125 (16566) 2013-10-18 19:21:59
#73 Swathi Pai (swathi3184) 1124 (3354) 2013-11-03 20:27:28
#74 Francisco Moraes (fmoraes) 1124 (90044) 2013-11-06 16:14:19
#75 Brad (braddrew) 1123 (15878) 2013-12-09 10:51:35
#76 jonathan (munz) 1122 (8954) 2013-12-30 04:57:50
#77 Csaba Fitzl (csaby) 1122 (6696) 2014-01-02 11:08:24
#78 Alain (Integral) 1122 (207924) 2014-01-06 17:26:10
#79 Pavel (haw) 1122 (22728) 2014-01-12 20:34:01
#80 Michael Doucha (mdou) 1120 (13757) 2014-02-18 15:24:44
#81 Duy Khanh Dau (khanh45a3kct) 1119 (5783) 2014-03-10 21:59:10
#82 hellman (hellman) 1119 (14862) 2014-03-13 10:05:36
#83 caesar ([caesar]) 1119 (10738) 2014-03-23 20:48:32
#84 Karl Schutt (günter) 1119 (41550) 2014-04-05 14:09:56
#85 Thomas Schmucker (dg) 1118 (26066) 2014-05-07 12:15:25
#86 Michael (pheenyx) 1117 (3840) 2014-05-23 22:57:25
#87 Igor (idipaolo) 1117 (10639) 2014-05-25 21:35:30
#88 julius gaius (julius) 1115 (25581) 2014-07-21 17:31:26
#89 Peter (51dc30ddc) 1115 (10916) 2014-07-23 23:42:03
#90 Robert (rm) 1115 (56475) 2014-08-08 18:26:25
#91 Konstantin (tempestadept) 1113 (3847) 2014-10-23 10:30:51
#92 Samyuktha Tina (samyusridhar) 1112 (2218) 2014-11-04 00:49:49
#93 Glaudson Ocampos (nashleon) 1112 (1820) 2014-11-05 01:25:18
#94 Julia Bernotat (El Greco ) 1112 (81129) 2014-11-26 18:54:07
#95 Kai Ludwig (TalentRaspel) 1111 (15704) 2015-01-12 22:36:12
#96 Claude Vaillancourt (Cl3v3r) 1110 (38351) 2015-01-16 23:03:12
#97 Shoukat (e195633) 1110 (10617) 2015-02-03 00:12:16
#98 Danny Higgins (hamster147) 1110 (37889) 2015-02-15 20:25:39
#99 Konstantin Golovan (SoulShaker) 1109 (14091) 2015-03-07 20:21:17
#100 R (r?) 1109 (6742) 2015-03-19 16:40:39
#101 Jeremy Chuang (jeremhh) 1109 (6643) 2015-03-19 16:43:34
#102 Rainer Zufall (kiekuk) 1109 (56786) 2015-04-01 09:53:07
#103 Erik (Erox) 1107 (26141) 2015-07-15 22:35:49
#104 Fabio (degrigis) 1106 (1206) 2015-07-18 15:07:23
#105 Javantea (Javantea) 1106 (40816) 2015-07-27 20:21:58
#106 J-L Morel (Rossignol) 1106 (29425) 2015-07-29 15:11:01
#107 Sean (Kavanaugh) 1106 (29143) 2015-08-13 20:11:59
#108 Ylona (Sirene) 1105 (4425) 2015-09-07 13:58:02
#109 Kokx (kokx) 1105 (4810) 2015-09-07 14:26:49
#110 S Combes (jerva) 1105 (99132) 2015-10-24 20:52:09
#111 Alain Collignon (vexilla72) 1104 (96903) 2015-10-30 17:18:06
#112 Szabó Zoltán (szabo.z87) 1104 (55604) 2015-11-09 14:26:42
#113 Martin (martinbucher) 1104 (27363) 2015-11-09 16:25:42
#114 Rainer (Rainer74) 1104 (8417) 2015-12-21 19:45:28
#115 Dominik M. (Sgt. Pepper) 1104 (97919) 2015-12-22 11:56:41
#116 T (Wagner) 1103 (16988) 2015-12-27 18:38:26
#117 Casaubon (cfreuden) 1103 (8515) 2016-01-13 17:08:09
#118 D (devilchn) 1103 (11142) 2016-02-05 14:00:40
#119 Andreas Frerichs (Ossili) 1102 (33266) 2016-02-19 12:06:59
#120 Marco Manfredi (mkk9901) 1102 (17686) 2016-03-14 15:06:45
#121 Vigneshwari Chandrasekaran (vigneshwari24) 1102 (1102) 2016-03-18 05:02:31
#122 Madhura Kaple (madhura) 1102 (1102) 2016-03-18 21:06:59
#123 Felix (Flix) 1102 (13712) 2016-04-12 22:10:21
#124 Peter (Garnet) 1101 (14234) 2016-04-21 12:01:51
#125 Wieland (wisch) 1101 (6633) 2016-05-30 21:08:29
#126 Norbert Biermann (Norbert) 1100 (45031) 2016-07-06 08:58:08
#127 Vlatiha Romanova (Vlatiha) 1100 (10323) 2016-08-04 11:38:43
#128 Flo (sealth) 1100 (13472) 2016-08-22 04:17:57
#129 Nicolas (nicosPavlov) 1099 (151166) 2016-09-29 17:40:27
#130 JoGo (JoGo) 1098 (11686) 2016-12-04 21:47:52
#131 Marcel (bene1512) 1098 (20896) 2017-01-07 19:23:10
#132 Michael (FoM) 1097 (38953) 2017-01-25 09:15:19
#133 Tristan1473 (Tristan1473) 1097 (18914) 2017-02-12 10:44:29
#134 Hans Joachim Girulat (joregi) 1097 (36278) 2017-02-26 00:56:53
#135 Mir Dim (mir0soft) 1097 (72404) 2017-03-14 08:15:29
#136 chris (c2) 1097 (51973) 2017-03-14 10:47:13
#137 Jane Alam Jan (jan876) 1097 (1097) 2017-03-22 10:28:28
#138 Tazmina Riya (Tazmina Riya) 1097 (1097) 2017-03-24 21:55:02
#139 Ajay Prashant (Ajay_Prashant) 1097 (2491) 2017-03-25 00:50:01
#140 Daniel Walder (ibex) 1096 (14672) 2017-04-27 23:01:20
#141 Kasia (kasia-tutej) 1096 (53366) 2017-05-30 12:38:55
#142 john doe (misio) 1096 (7371) 2017-05-30 12:58:09
#143 Mihail (plexor) 1096 (16827) 2017-06-04 13:51:15
#144 D3d4lu5 (D3d4lu5) 1096 (297709) 2017-06-12 20:37:00
#145 Imam Uasa (Merricx) 1096 (9188) 2017-06-13 16:50:49
#146 NGUYEN Ngoc Ky (kynguyenngoc) 1096 (4974) 2017-06-18 15:07:26
#147 Akonia (Akonia12) 1095 (12153) 2017-07-16 16:48:29
#148 Moomin (Mushmom) 1095 (7674) 2017-07-21 09:18:41
#149 George Lasry (george4096) 1095 (302230) 2017-07-30 13:25:55
#150 juw (juw) 1095 (4179) 2017-08-10 21:39:51
#151 Immo Weber (MandelToast) 1095 (10061) 2017-08-19 18:38:33
#152 Kim H. S. (tenchijin) 1095 (25468) 2017-08-23 13:27:42
#153 Julian (Lemmynator) 1095 (18353) 2017-09-16 14:52:02
#154 Pratik Patil (pratikvpatil) 1094 (1094) 2017-10-12 01:31:05
#155 jace chan (fattywompus) 1094 (1094) 2017-10-12 01:39:13
#156 Pratik Patil (pratikvpatil1234) 1094 (1094) 2017-10-12 04:52:34
#157 Aijun (geaijun) 1093 (3379) 2018-01-07 11:39:14
#158 Timothy Chow (timmah) 1093 (1093) 2018-03-13 22:14:11
#159 Tom Tox (tox) 1093 (17708) 2018-03-14 13:40:43
#160 Godfrey Norton (Godfrey) 1093 (8162) 2018-03-15 21:29:02
#161 Nofre Tete (noffi) 1093 (21921) 2018-03-16 00:29:12
#162 Silvia Kortmann (mikinsget) 1092 (10104) 2018-05-07 15:02:39
#163 Steve Vaillancourt (stvai2) 1092 (15041) 2018-05-11 12:16:00
#164 Eric (ExAstris) 1092 (26990) 2018-05-17 02:45:11
#165 Christophe BORELLY (cb34) 1092 (12358) 2018-06-06 21:19:29
#166 E41514050 (E41514050) 1091 (3870) 2018-07-07 10:43:28
#167 LQL (E41514067) 1091 (3180) 2018-07-08 09:58:38
#168 Random Dude (rnd) 1091 (93505) 2018-08-07 02:15:58
#169 Manfred Paul (manf) 1090 (14774) 2018-11-14 00:07:02
#170 mglarragan (mglarragan) 1090 (2091) 2019-01-14 22:28:39
#171 eschar (eschar) 1090 (3264) 2019-01-22 18:26:04
#172 simone (xseris) 1089 (8632) 2019-02-16 11:16:38
#173 LoneWolf219 (LoneWolf219) 1089 (12795) 2019-03-08 03:00:14
#174 whitecowboy (whitecowboy) 1089 (7446) 2019-03-08 04:27:53
#175 Lane Williams (planetlane) 1089 (23948) 2019-03-10 04:13:14
#176 E41614031 (E41614031) 1089 (7526) 2019-03-10 16:56:20
#177 schwuggel1337 (schwuggel1337) 1089 (7716) 2019-03-20 20:08:07
#178 Will (nitrow) 1089 (6807) 2019-03-21 15:52:11
#179 ykaridi (ykaridi) 1089 (7035) 2019-03-23 01:06:11
#180 Klaus (kumaus) 1089 (21415) 2019-04-01 16:13:17
#181 madness (madness) 1089 (15407) 2019-04-03 05:48:15
#182 Marco Cinelli (Snap) 1089 (28365) 2019-04-27 11:56:11
#183 Eugene (lim0n) 1089 (62911) 2019-05-03 15:02:08
#184 Mike (RogueRamblers) 1088 (29805) 2019-05-27 02:41:12
#185 ENOENT (ENOENT) 1088 (13478) 2019-05-31 15:29:48
#186 Christian (MarquisDeSud) 1088 (7848) 2019-06-03 09:59:11
#187 yult (yult) 1088 (12185) 2019-07-11 18:17:09
#188 gerdw (gerdw) 1088 (30489) 2019-07-12 21:00:11
#189 ajg (ludimus) 1088 (12114) 2019-07-22 19:05:47
#190 Stephan (Stephje1978) 1088 (26961) 2019-07-22 20:42:24
#191 Edward Broeder (onlyinabrz) 1087 (1087) 2019-10-09 07:49:05
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