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Level II Challenges (160)

Page 11 of the challenges in Level II, ordered by date posted (the most recent appear first).

"The Road" — Part 2

[gutgesell-07] - 0 users already solved this challenge.
 
 
 

Once upon a time, there was a three-part challenge which was inspired by Kryptos and is based on a fairy tale. Can you solve this mysterious challenge?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2018-12-08 17:42
Maximum number of attempts for this challenge: 15

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"The Road" — Part 1

[gutgesell-06] - 5 users already solved this challenge.
 
 
 

Once upon a time, there was a three-part challenge which was inspired by Kryptos and is based on a fairy tale. Can you solve this mysterious challenge?
Read more...

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

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2018-12-08 17:27
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#5) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 1824 (206965) 2018-12-10 15:47:26
Viktor (Veselovský) 1613 (169444) 2018-12-13 15:15:16
D3d4lu5 (D3d4lu5) 1315 (363488) 2019-01-14 08:37:31
Eugene (lim0n) 1163 (195334) 2019-10-30 12:18:39
#5 Snake (snk) 1160 (187783) 2019-11-14 21:04:35
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Breaking a Filter Generator

[cli-03] - 19 users already solved this challenge.
 
 
 

You are given a part of a keystream, which was produced by a filter generator. Can you find the missing keystream bytes?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2018-09-25 14:22
Maximum number of attempts for this challenge: 15

All successful users of this challenge

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

Kurt Gebauer (Yokozuna) 1824 (282608) 2018-09-26 21:06:06
Viktor (Veselovský) 1725 (169444) 2018-09-27 22:20:26
roehm (roehm) 1725 (5399) 2018-09-28 00:56:29
D3d4lu5 (D3d4lu5) 1725 (363488) 2018-09-28 02:01:18
#5 Alain Collignon (vexilla72) 1660 (123666) 2018-09-28 16:19:20
#6 Scombes (jerva) 1660 (266541) 2018-09-29 13:49:15
#7 Nicolas (nicosPavlov) 1469 (257791) 2018-10-06 07:29:57
#8 E.T (Ertheb) 1385 (81809) 2018-10-15 13:04:25
#9 George Lasry (george4096) 1330 (422251) 2018-10-27 02:15:58
#10 Random Dude (rnd) 1318 (103645) 2018-10-30 18:04:00
#11 Kasia (kasia-tutej) 1232 (53366) 2018-12-31 19:29:06
#12 ykaridi (ykaridi) 1192 (7035) 2019-03-27 20:24:51
#13 Bart den Hartog (Bart13) 1164 (149236) 2019-08-06 16:56:35
#14 Eugene (lim0n) 1161 (195334) 2019-08-30 12:17:05
#15 Snake (snk) 1156 (187783) 2019-10-05 09:29:41
#16 Noam Gutterman (Noam528) 1150 (1150) 2019-12-02 11:44:58
#17 madness (madness) 1138 (71592) 2020-04-27 13:55:25
#18 Em Doulgerakis (Greko) 1122 (193799) 2021-03-07 14:14:24
#19 Luigi Tomelli (archstanton) 1119 (127538) 2021-06-04 19:29:37
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Trendy Messenger

[minihold-03] - 31 users already solved this challenge, 2 are working on it.
 
 
 

Sniffing on the WiFi, you notice an ElGamal encrypted message. Are you able to compute it?
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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2018-06-12 13:26
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#31) Achieved points (Global score) y-m-d - h:m:s

D3d4lu5 (D3d4lu5) 2000 (363488) 2018-06-13 01:04:34
Kurt Gebauer (Yokozuna) 2000 (282608) 2018-06-13 11:25:42
Dominik M. (Sgt. Pepper) 1824 (128575) 2018-06-13 14:33:57
Viktor (Veselovský) 1725 (169444) 2018-06-14 19:05:40
#5 Alain Collignon (vexilla72) 1547 (123666) 2018-06-19 07:44:33
#6 George (Theofanidis) 1523 (132517) 2018-06-19 19:26:48
#7 Vlad (Vlad94) 1523 (1523) 2018-06-19 20:50:56
#8 Teodoru catalin Andrei (teodoru) 1502 (5698) 2018-06-20 16:01:04
#9 Eric (ExAstris) 1469 (56037) 2018-06-22 16:47:20
#10 E.T (Ertheb) 1456 (81809) 2018-06-23 14:51:57
#11 Christophe BORELLY (cb34) 1433 (12358) 2018-06-25 13:53:33
#12 Silvia Kortmann (mikinsget) 1406 (24027) 2018-06-29 10:26:04
#13 Armin Krauss (argh) 1398 (206965) 2018-06-29 14:25:48
#14 Nicolas (nicosPavlov) 1330 (257791) 2018-07-13 16:23:13
#15 Mihail (plexor) 1327 (16827) 2018-07-14 19:56:05
#16 Alain (Integral) 1307 (207924) 2018-07-21 13:53:14
#17 Em Doulgerakis (Greko) 1288 (193799) 2018-07-30 16:34:08
#18 Karl Schutt (günter) 1278 (44374) 2018-08-06 05:43:46
#19 Javantea (Javantea) 1218 (40816) 2018-10-10 03:19:11
#20 Random Dude (rnd) 1212 (103645) 2018-10-22 22:43:50
#21 kilink (kilink) 1200 (8053) 2018-11-19 00:27:26
#22 Snake (snk) 1199 (187783) 2018-11-23 16:13:11
#23 Rainer Zufall (kiekuk) 1199 (56786) 2018-11-23 21:37:49
#24 Luigi Tomelli (archstanton) 1191 (127538) 2018-12-15 19:54:53
#25 Kasia (kasia-tutej) 1187 (53366) 2018-12-31 17:02:03
#26 Will (nitrow) 1164 (6807) 2019-04-26 11:30:50
#27 Eugene (lim0n) 1161 (195334) 2019-05-13 11:02:50
#28 Bart den Hartog (Bart13) 1153 (149236) 2019-07-22 17:30:41
#29 Bernd (tryone144) 1131 (8066) 2020-04-26 16:38:14
#30 madness (madness) 1131 (71592) 2020-04-27 16:40:02
#31 Marco Cinelli (Snap) 1129 (37769) 2020-06-05 09:37:44
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Fastest in the West

[minihold-01] - 31 users already solved this challenge.
 
 
 

Buying a train ticket via credit card should not be a problem — actually. Can you solve the subset-sum problem to get your train?
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Click here to download the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2018-06-12 13:24
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#31) Achieved points (Global score) y-m-d - h:m:s

Kurt Gebauer (Yokozuna) 2000 (282608) 2018-06-13 03:24:07
D3d4lu5 (D3d4lu5) 2000 (363488) 2018-06-13 07:45:23
Alain Collignon (vexilla72) 2000 (123666) 2018-06-13 10:36:19
Dominik M. (Sgt. Pepper) 1824 (128575) 2018-06-14 13:22:36
#5 Viktor (Veselovský) 1725 (169444) 2018-06-14 16:21:58
#6 George (Theofanidis) 1660 (132517) 2018-06-15 20:11:16
#7 E.T (Ertheb) 1576 (81809) 2018-06-17 22:53:05
#8 Diaconu Bogdan (bogdan_walle) 1523 (1723) 2018-06-19 16:36:32
#9 Teodoru catalin Andrei (teodoru) 1502 (5698) 2018-06-20 15:58:58
#10 Eric (ExAstris) 1485 (56037) 2018-06-21 18:56:13
#11 Alain (Integral) 1485 (207924) 2018-06-22 00:15:18
#12 Snake (snk) 1469 (187783) 2018-06-22 22:48:21
#13 Armin Krauss (argh) 1398 (206965) 2018-06-29 15:27:43
#14 Nicolas (nicosPavlov) 1391 (257791) 2018-07-01 04:20:26
#15 Christophe BORELLY (cb34) 1385 (12358) 2018-07-02 11:31:03
#16 George Lasry (george4096) 1367 (422251) 2018-07-04 23:19:04
#17 Em Doulgerakis (Greko) 1288 (193799) 2018-07-30 15:10:17
#18 Michael Möller (michaelm) 1233 (256593) 2018-09-16 15:06:39
#19 Random Dude (rnd) 1212 (103645) 2018-10-21 20:56:52
#20 Rainer Zufall (kiekuk) 1206 (56786) 2018-11-03 21:05:24
#21 kilink (kilink) 1200 (8053) 2018-11-19 00:02:07
#22 Luigi Tomelli (archstanton) 1191 (127538) 2018-12-16 10:43:50
#23 Kasia (kasia-tutej) 1187 (53366) 2018-12-31 16:12:51
#24 Bart den Hartog (Bart13) 1153 (149236) 2019-07-22 21:37:01
#25 Eugene (lim0n) 1152 (195334) 2019-08-01 14:43:32
#26 Dr. Peter Uelkes (RandyWaterhouse) 1150 (9990) 2019-08-18 12:10:20
#27 Karl Schutt (günter) 1139 (44374) 2020-01-01 12:07:46
#28 madness (madness) 1135 (71592) 2020-02-28 17:56:18
#29 Marco Cinelli (Snap) 1129 (37769) 2020-06-06 16:02:43
#30 DS (DS8279) 1121 (34191) 2020-12-20 11:20:19
#31 Antares (Antares) 1114 (32880) 2021-07-12 20:39:35
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   +++    [16:58 - 27.09.2021] Surtees solved the Level I challenge 'Number Sequence — Part 2'    +++    [14:53 - 27.09.2021] jenniferdecastro solved the Level I challenge 'A hidden word'    +++    [14:28 - 27.09.2021] Mercer solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++    [09:52 - 26.09.2021] CRYbaby solved the Level I challenge 'How do you become a big cryptographer?'    +++    [17:29 - 25.09.2021] gemmath solved the Level I challenge 'Letter to the Templars — Part 1'    +++