MysteryTwister C3
NUMBER OF ACTIVE MEMBERS:

11195
Follow us: Facebook Twitter
Dear users, we apologize for the long response times of our server. We are currently in the closing stages of developing a completely redesigned site with much better performance, and we are confident to go live this summer. Thanks for your understanding.
 



Level II Challenges (160)

Page 10 of the challenges in Level II, ordered by date posted (the most recent appear first).

Homophonic Encryption — Part 2

[kopal-02] - 31 users already solved this challenge, 1 is working on it.
 
 
 

Homophonic encryption is a modified version of the monoalphabetic substitution: One plaintext symbol can be substituted by more than one ciphertext symbol. In part 2 of this series we consider a distribution of the homophones based on English language statistics. This is a ciphertext-only challenge. Try to crack the ciphertext and extract a specific word from the plaintext.
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.
Published on: 2019-05-08 21:30
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

George Lasry (george4096) 1725 (422251) 2019-05-10 22:02:30
Armin Krauss (argh) 1725 (206965) 2019-05-10 22:04:09
Snake (snk) 1725 (187783) 2019-05-10 22:29:03
Alain Collignon (vexilla72) 1725 (123666) 2019-05-10 23:47:11
#5 Viktor (Veselovský) 1725 (169444) 2019-05-11 00:58:36
#6 H. Lautenschlager (helmi) 1725 (57600) 2019-05-11 19:53:59
#7 Kurt Gebauer (Yokozuna) 1725 (282608) 2019-05-11 20:56:51
#8 E.T (Ertheb) 1613 (81809) 2019-05-13 19:28:56
#9 D3d4lu5 (D3d4lu5) 1576 (363488) 2019-05-14 06:05:32
#10 Eugene (lim0n) 1523 (195334) 2019-05-16 13:32:40
#11 sarah b (silva) 1485 (52424) 2019-05-18 19:57:39
#12 Random Dude (rnd) 1469 (103645) 2019-05-19 05:44:02
#13 George (Theofanidis) 1469 (132517) 2019-05-19 16:12:16
#14 Dominik M. (Sgt. Pepper) 1433 (128575) 2019-05-22 15:21:28
#15 Danny Higgins (hamster147) 1423 (39638) 2019-05-22 21:56:59
#16 Stephan (Stephje1978) 1254 (27064) 2019-07-20 18:47:10
#17 Bart den Hartog (Bart13) 1251 (149236) 2019-07-23 00:42:48
#18 Gerd Wilts (gerdw) 1246 (50634) 2019-07-27 23:58:09
#19 Em Doulgerakis (Greko) 1197 (193799) 2019-10-22 22:15:01
#20 madness (madness) 1170 (71592) 2020-02-10 21:13:23
#21 Thomas (Thomas4897) 1167 (36141) 2020-02-28 18:19:21
#22 J-L Morel (Rossignol) 1162 (42130) 2020-03-30 19:13:06
#23 Derek Hatton (alfred_noble) 1140 (33998) 2020-11-02 23:44:54
#24 Michael (FoM) 1138 (57794) 2020-12-04 02:17:07
#25 Mike (RogueRamblers) 1134 (81614) 2021-01-31 01:44:55
#26 Lane Williams (planetlane) 1131 (34637) 2021-04-01 16:42:11
#27 gordon (sir5) 1129 (16181) 2021-05-12 11:34:13
#28 Martin (martinbucher) 1129 (38365) 2021-05-13 15:22:49
#29 Luigi Tomelli (archstanton) 1129 (127538) 2021-05-13 20:11:20
#30 Eric (ExAstris) 1129 (56037) 2021-05-19 02:48:11
#31 zuben c3 (zuben-c3) 1127 (44417) 2021-06-28 23:18:49
You must be logged in to solve the challenge


Homophonic Encryption — Part 1

[kopal-01] - 36 users already solved this challenge.
 
 
 

Homophonic encryption is a modified version of the monoalphabetic substitution: One plaintext symbol can be substituted by more than one ciphertext symbol. In part 1 of this series every plaintext symbol has the same number of possible substitutions. This is a ciphertext-only challenge. Try to crack the ciphertext and extract a specific word from the plaintext.
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.
Published on: 2019-05-04 15:22
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#36) Achieved points (Global score) y-m-d - h:m:s

Snake (snk) 2000 (187783) 2019-05-04 20:15:46
Armin Krauss (argh) 2000 (206965) 2019-05-04 23:35:06
D3d4lu5 (D3d4lu5) 2000 (363488) 2019-05-05 04:23:38
Kurt Gebauer (Yokozuna) 2000 (282608) 2019-05-05 13:33:42
#5 H. Lautenschlager (helmi) 2000 (57600) 2019-05-05 13:50:31
#6 Dominik M. (Sgt. Pepper) 2000 (128575) 2019-05-05 15:17:09
#7 George (Theofanidis) 1824 (132517) 2019-05-05 19:47:28
#8 Marc (rcll0891) 1824 (24004) 2019-05-05 22:43:25
#9 Alain Collignon (vexilla72) 1824 (123666) 2019-05-06 11:43:14
#10 E.T (Ertheb) 1824 (81809) 2019-05-06 14:05:14
#11 Viktor (Veselovský) 1725 (169444) 2019-05-06 19:00:08
#12 Michael Möller (michaelm) 1725 (256593) 2019-05-06 22:40:30
#13 George Lasry (george4096) 1660 (422251) 2019-05-07 22:40:03
#14 sarah b (silva) 1523 (52424) 2019-05-12 10:44:07
#15 Eugene (lim0n) 1469 (195334) 2019-05-15 14:53:33
#16 Random Dude (rnd) 1444 (103645) 2019-05-17 03:56:02
#17 Danny Higgins (hamster147) 1391 (39638) 2019-05-22 17:04:47
#18 Hans Joachim Girulat (joregi) 1261 (36278) 2019-07-09 15:30:08
#19 Stephan (Stephje1978) 1249 (27064) 2019-07-20 19:47:49
#20 Bart den Hartog (Bart13) 1247 (149236) 2019-07-22 23:32:57
#21 Gerd Wilts (gerdw) 1243 (50634) 2019-07-27 20:56:08
#22 Em Doulgerakis (Greko) 1197 (193799) 2019-10-21 10:10:45
#23 Jasmin (Miles) 1176 (8987) 2020-01-08 01:58:05
#24 madness (madness) 1170 (71592) 2020-02-10 10:30:43
#25 Thomas (Thomas4897) 1166 (36141) 2020-02-28 18:14:54
#26 J-L Morel (Rossignol) 1162 (42130) 2020-03-29 17:10:19
#27 Martin (martinbucher) 1156 (38365) 2020-05-17 12:33:58
#28 Nicolas (nicosPavlov) 1146 (257791) 2020-08-23 05:43:56
#29 Derek Hatton (alfred_noble) 1140 (33998) 2020-11-02 23:57:15
#30 Lane Williams (planetlane) 1140 (34637) 2020-11-03 18:58:58
#31 Michael (FoM) 1138 (57794) 2020-12-02 20:22:33
#32 Mike (RogueRamblers) 1134 (81614) 2021-01-30 19:02:17
#33 Luigi Tomelli (archstanton) 1129 (127538) 2021-05-11 17:51:28
#34 gordon (sir5) 1129 (16181) 2021-05-12 11:30:59
#35 Eric (ExAstris) 1128 (56037) 2021-05-19 02:37:40
#36 zuben c3 (zuben-c3) 1126 (44417) 2021-06-28 20:28:21
You must be logged in to solve the challenge


Handycipher made in love — Part 1

[theofanidis-09] - 23 users already solved this challenge.
 
 
 

Strange things happen when you're in love. This challenge is about how the plaintext can be revealed when Handycipher is used in a wrong way.
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.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2019-02-16 12:29
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#23) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (206965) 2019-02-16 14:52:29
D3d4lu5 (D3d4lu5) 2000 (363488) 2019-02-16 16:30:13
Michael Möller (michaelm) 2000 (256593) 2019-02-16 18:53:09
George Lasry (george4096) 2000 (422251) 2019-02-16 21:36:16
#5 Alain Collignon (vexilla72) 2000 (123666) 2019-02-16 22:05:39
#6 Viktor (Veselovský) 2000 (169444) 2019-02-16 23:50:47
#7 Kurt Gebauer (Yokozuna) 2000 (282608) 2019-02-17 05:12:50
#8 Dominik M. (Sgt. Pepper) 1824 (128575) 2019-02-17 16:28:10
#9 Snake (snk) 1824 (187783) 2019-02-17 19:03:26
#10 Rainer Zufall (kiekuk) 1406 (56786) 2019-03-04 14:32:25
#11 sarah b (silva) 1281 (52424) 2019-04-10 10:11:09
#12 curmudgeon (curmudgeon) 1262 (1973) 2019-04-23 06:26:13
#13 Beamofoldlight (Beamofoldlight) 1250 (3745) 2019-05-03 16:05:30
#14 Danny Higgins (hamster147) 1236 (39638) 2019-05-19 22:53:22
#15 Eugene (lim0n) 1233 (195334) 2019-05-23 14:09:42
#16 Random Dude (rnd) 1227 (103645) 2019-05-31 13:45:56
#17 E.T (Ertheb) 1216 (81809) 2019-06-19 17:29:41
#18 Bart den Hartog (Bart13) 1199 (149236) 2019-07-29 05:55:03
#19 Silvia Kortmann (mikinsget) 1144 (24027) 2020-07-03 12:30:53
#20 Nicolas (nicosPavlov) 1139 (257791) 2020-08-25 18:38:22
#21 Em Doulgerakis (Greko) 1130 (193799) 2021-01-22 17:19:59
#22 madness (madness) 1124 (71592) 2021-06-17 04:01:37
#23 Alain Millecam (Vadrusz) 1121 (5189) 2021-09-06 02:59:14
You must be logged in to solve the challenge


Monoalphabetic Substitution with Nostradamus Flavor

[theofanidis-08] - 28 users already solved this challenge, 3 are working on it.
 
 
 

What would Nostradamus do to make a mono-alphabetic substitution harder to break?
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: 2019-02-16 12:28
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#28) Achieved points (Global score) y-m-d - h:m:s

Armin Krauss (argh) 2000 (206965) 2019-02-16 13:26:09
D3d4lu5 (D3d4lu5) 2000 (363488) 2019-02-16 15:57:07
Dominik M. (Sgt. Pepper) 2000 (128575) 2019-02-16 19:22:15
George Lasry (george4096) 2000 (422251) 2019-02-16 21:43:46
#5 Viktor (Veselovský) 2000 (169444) 2019-02-16 23:02:15
#6 Alain Collignon (vexilla72) 2000 (123666) 2019-02-16 23:07:32
#7 Kurt Gebauer (Yokozuna) 2000 (282608) 2019-02-17 06:54:14
#8 Snake (snk) 1824 (187783) 2019-02-17 17:11:33
#9 Luigi Tomelli (archstanton) 1660 (127538) 2019-02-19 13:04:04
#10 Lane Williams (planetlane) 1660 (34637) 2019-02-19 16:02:06
#11 Random Dude (rnd) 1660 (103645) 2019-02-19 17:26:52
#12 Karl Schutt (günter) 1660 (44374) 2019-02-19 18:42:32
#13 sarah b (silva) 1613 (52424) 2019-02-20 15:14:33
#14 Pierre Robier (tripleedged) 1613 (5916) 2019-02-20 21:29:51
#15 Rainer Zufall (kiekuk) 1444 (56786) 2019-02-28 16:30:24
#16 E.T (Ertheb) 1261 (81809) 2019-04-23 17:55:37
#17 Hans Joachim Girulat (joregi) 1223 (36278) 2019-06-07 22:57:11
#18 Michael (FoM) 1217 (57794) 2019-06-18 17:17:19
#19 Bart den Hartog (Bart13) 1185 (149236) 2019-09-11 18:27:40
#20 Derek Hatton (alfred_noble) 1160 (33998) 2020-01-29 23:02:28
#21 Thomas (Thomas4897) 1156 (36141) 2020-03-01 18:09:54
#22 Eugene (lim0n) 1155 (195334) 2020-03-06 13:47:39
#23 Mike (RogueRamblers) 1147 (81614) 2020-05-18 02:13:45
#24 Somebody (Achidutzu) 1146 (16867) 2020-06-07 20:54:40
#25 Nicolas (nicosPavlov) 1140 (257791) 2020-08-23 12:05:05
#26 Em Doulgerakis (Greko) 1132 (193799) 2020-12-28 17:35:53
#27 J-L Morel (Rossignol) 1131 (42130) 2021-01-15 16:45:37
#28 Eric (ExAstris) 1126 (56037) 2021-04-21 22:27:39
You must be logged in to solve the challenge


"The Road" — Part 3

[gutgesell-08] - 0 users already solved this challenge, 2 are working on it.
 
 
 

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 17:45
Maximum number of attempts for this challenge: 15

All successful users of this challenge

No one solved the challenge right now. Be the first!
You must be logged in to solve the challenge
Pages [32] << < 23456789101112131415161718 > >> Show All  
 
 
powered by the CrypTool project  CrypTool

 

   +++    [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'    +++