MysteryTwister C3
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With the launch of MysteryTwister C3 you can challenge your own knowledge by solving the given cryptographic challenges.


MTC3 — The new Crypto Cipher Contest

mtc3

Welcome to MTC3!



You like riddles? You always loved to solve the crosswords in your newspaper? Or maybe you are just curious and want to find out about some of the ways to hide a secret (and possibily even to uncover it)? This is your place! Here at MysteryTwister C3 you can solve crypto challenges, starting from the simple Caesar cipher all the way to modern AES we have challenges for everyone. Our challenges range from level I to III, and an additional level X for "mystery" challenges (they may have been unsolved for a long time, mostly we don't know their solution or have no idea whether there is a solution at all). If you are a beginner its probably best if you start trying those challenges that have been solved mostly (see table below). Additional information regarding MTC3 can be found on our about page.


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You might want to try some of these

The following table provides you with the list of all challenges currently available. If you are logged in, those are excluded which you already solved or where you are a (co-)author.
The challenges are sorted by default by the ones which have been solved mostly by all users. Alternatively you can also sort the table by content of column [to do this just click on the head of one of the columns "Challenge name", "Level", "# times solved" or "Current points to get"].
"Current points to get" shows how many points you get when you submit the solution today. By clicking on the challenge name within the list you will be taken directly to the corresponding challenge and can start solving it.
Score hunters try those challenges that yield the highest available points. Accordingly, those will be harder! Test your skills! Besides using the table below there is also a detailed list of all challenges



Check, which levels to show Level I Level II Level III Level X
If you are logged-in this list will only show those challenges you haven't solved yet.

# challenge name Level # times solved Current points to get
1 Number Sequence I 2567 100
2 Original Caesar Cipher I 1639 100
3 Number Sequence — Part 2 I 1142 100
4 Caesar Encryption I 858 100
5 Beaver Code I 615 100
6 Letter to the Templars — Part 1 I 557 100
7 Number Sequence — Part 3 I 524 100
8 Letter to the Templars — Part 2 I 452 100
9 Number Sequence — Part 4 I 417 100
10 Monoalphabetic Substitution I 393 100
11 A hidden word I 368 100
12 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 344 100
13 Letter to the Templars — Part 3 II 338 1109
14 Factorization Cipher — Part 1 I 307 100
15 Grille Cipher I 275 100
16 Homophonic Encryption Part 1 I 273 100
17 Cracking SHA1-Hashed Passwords II 243 1099
18 Homophonic Encryption Part 2 I 238 100
19 One-Time Pad with Flaws I 214 100
20 Snow White and the seven dwarfs I 196 100
21 Alice's Birthday Party (Part 1) II 169 1097
22 Alice's Birthday Party (Part 2) II 161 1097
23 From Russia with Love I 146 100
24 Modified Caesar Cipher I 141 100
25 Reserve Hand Procedure — Part 1 I 141 100
26 How do you become a big cryptographer? I 132 100
27 Letter from the Alleged Countess Julie von Ortenburg I 131 100
28 Classical Ciphers^3 I 126 100
29 Broadcasting and low exponent — RSA-Attack II 126 1101
30 Not-so-Secret Message from Malawi — Part I (RSA) II 116 1097
31 Enigma Messages with Repeated Letters — Part 1 I 107 100
32 Brute-Force-Attack on Triple-DES with Reduced Key Space II 106 1097
33 Pigpen with a twist — Part 1 I 104 100
34 The Book Code: A Challenge for Bookworms I 100 100
35 Hybrid Encryption I II 100 1097
36 M-138 — Part 1 I 100 100
37 RSA: Two different keys — same ciphertext II 98 1101
38 Factorization Cipher — Part 2 II 95 1103
39 A Secret Message from Castle Mansfeld I 95 100
40 Enigma Part 1 II 94 1097
41 Molehunt (Part 1/3) I 93 100
42 Nils away on travel I 92 100
43 Molehunt (Part 2/3) I 91 100
44 Number Sequence — Part 8 I 88 100
45 A really long number sequence II 84 1102
46 Trifid Cipher I 79 100
47 ADFGVX — Part 2 I 78 100
48 Kaskade-S/T — Part 1 I 78 100
49 ¿No Hablas Español? No problemo! I 75 100
50 Enigma Combinatorics I 74 100
51 ADFGVX — Part 1 I 68 100
52 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 I 67 100
53 Playfair Encryption I 66 100
54 Playfair with hints about the grid I 65 100
55 Double Columnar Transposition I 65 100
56 ECDH-Key Exchange for Beginners I 64 100
57 Zodiac Cipher I 63 100
58 ORYX Stream Cipher Part I II 62 1097
59 Enigma Part 2 II 60 1097
60 Heartbleed — Part 1 I 59 100
61 M-138 — Part 2 II 58 1142
62 Factorization Cipher — Part 3 II 57 1104
63 Molehunt (Part 3/3) II 54 1097
64 Smartcard RSA II 53 1097
65 Partial Key Exposure with RSA — Part 1 II 51 1104
66 Number Sequence — Part 6 I 51 100
67 Enigma Messages with Repeated Letters — Part 3 I 50 100
68 Enigma Messages with Repeated Letters — Part 2 I 50 100
69 Turing Bombe Enigma I I 49 100
70 Hill Cipher with Sudoku Key I 49 100
71 A hidden word — Part 2 I 48 100
72 BCR code (Book-Caesar-RSA) II 47 1109
73 Number Sequence — Part 5 I 47 100
74 The Last Note I 46 100
75 Enigma Messages with Repeated Letters — Part 5 I 46 100
76 Enigma Messages I 46 100
77 Cascading Encryption — Part 1/3 I 45 100
78 Multilingual Monoalphabetic Substitution I 44 100
79 Enigma Messages with Repeated Letters — Part 4 I 42 100
80 AES key — encoded in the machine readable zone of a European ePassport II 42 1104
81 An Invisible Message I 41 100
82 Heartbleed — Part 2 I 41 100
83 Recycled One-Time Pad I 40 100
84 Monoalphabetic substitution with camouflage — Part 1 I 38 100
85 Kaskade-S/T — Part 2 II 36 1099
86 Unusual encryption using a diophantine equation II 36 1101
87 ORYX Stream Cipher Part II II 35 1097
88 Keyshanc — Part 1 II 34 1106
89 Image Noise I 34 101
90 Strange Message from Thessaloniki I 32 100
91 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 32 1098
92 Music Code — Part 1 I 30 100
93 Music Code — Part 2 II 30 1100
94 Unconcealed RSA messages II 30 1102
95 Pigpen with a twist — Part 2 II 29 1101
96 Monoalphabetic substitution with camouflage — Part 4 I 29 100
97 News from Castle Mansfeld I 29 101
98 RSA Factoring Challenge: RSA-704 II 27 0
99 Monoalphabetic substitution with camouflage — Part 2 II 27 1103
100 Keyshanc — Part 2 II 27 1106
101 An 'unhearable' message I 27 100
102 Ku Klux Klan X 27 var
103 Double Column Transposition — Part 4 II 26 1128
104 Number Sequence — Part 7 I 26 100
105 Monoalphabetic substitution with camouflage — Part 3 II 26 1103
106 Not-so-Secret Message from Malawi — Part II (ECC) II 25 1097
107 Double Column Transposition — Part 2 II 24 1128
108 Weakened Granit — Part 1 I 24 100
109 Pigpen with a twist — Part 3 II 24 1101
110 Kaskade-S/T — Part 3 II 22 1099
111 CMEA 1 II 22 1098
112 ORYX Stream Cipher — Part 3 (revised) II 21 1115
113 M-138 — Part 3 II 21 1142
114 New Year's Greetings — Part 2 I 19 101
115 Double Column Transposition — Part 3 II 19 1128
116 Heartbleed — Part 3 II 19 1134
117 New Year's Greetings — Part 1 I 19 101
118 RSA Factoring Challenge: RSA-210 II 19 0
119 Lattice Part 1 II 18 1099
120 Typex — Part 1 II 17 1113
121 New Year's Greetings — Part 3 I 17 101
122 Spanish Strip Cipher — Part 1 II 17 1126
123 New Year's Greetings — Part 4 I 17 101
124 Monoalphabetic Substitution with Camouflage — Part 5 II 17 1105
125 Double Column Transposition — Part 1 II 16 1126
126 CMEA 2 III 16 13343
127 RSA with Special d III 15 13331
128 Typex — Part 2 II 15 1114
129 Spanish Strip Cipher — Part 2 II 14 1126
130 Concealed Messages — Vigenère's Night Sky X 13 var
131 Purple 1 II 11 1097
132 Cascading Encryption — Part 2/3 II 10 1113
133 Cascading Encryption — Part 3/3 II 10 1113
134 Weakened Handycipher — Part 1 II 8 1155
135 Flawed Usage of a OTP Cipher by the BND II 8 1170
136 Sigaba Part 1 II 8 1097
137 Kaskade-S/T — Part 5 II 8 1100
138 Weakened Handycipher — Part 3 II 7 1155
139 Akelarre Part 1 II 7 1097
140 New Year's Greetings — Part 5 II 7 1255
141 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2 II 7 1099
142 ORYX Stream Cipher — Part 4a II 6 1127
143 Weakened Handycipher — Part 2 II 6 1155
144 M-138 — Part 4 II 6 1142
145 Double Column Transposition — Part 5 II 4 1130
146 Notes of an Italian Soldier X 4 var
147 Handycipher — Part 3 III 2 14095
148 Double Column Transposition X 2 var
149 Handycipher — Part 2 II 2 1148
150 Sigaba Part 2 III 2 13331
151 Handycipher — Part 1 II 2 1148
152 Unknown Author X 2 var
153 Beale Ciphers X 1 var
154 Spirale — Part 3 II 1 1170
155 Spirale — Part 2 II 1 1170
156 Extended Handycipher — Part 1 II 1 1150
157 Extended Handycipher — Part 2 II 1 1150
158 Monoalphabetic Substitution with Camouflage — Part 6 II 1 1107
159 Spirale — Part 1 II 1 1170
160 Substitution Cipher with Non-Prefix Codes III 1 13388
161 ORYX Stream Cipher — Part 4b III 1 13800
162 Extended Handycipher — Part 3 II 1 1150
163 ORYX Stream Cipher — Part 4c III 0 13800
164 Spirale — Part 4 II 0 1170
165 Spanish Strip Cipher — Part 3 X 0 var
166 Weakened Granit — Part 3 II 0 1175
167 Weakened Granit — Part 2 II 0 1175
168 Double-Column Transposition/Granit — Part 1 II 0 1161
169 Double-Column Transposition/Granit — Part 2 II 0 1161
170 Double-Column Transposition/Granit — Part 3 II 0 1161
171 RSA Factoring Challenge: RSA-410 III 0 13452
172 RSA Factoring Challenge: RSA-270 III 0 13452
173 RSA Factoring Challenge: RSA-896 III 0 13452
174 RSA Factoring Challenge: RSA-260 III 0 13452
175 RSA Factoring Challenge: RSA-250 III 0 13452
176 RSA Factoring Challenge: RSA-240 III 0 13452
177 RSA Factoring Challenge: RSA-280 III 0 13452
178 RSA Factoring Challenge: RSA-290 III 0 13452
179 RSA Factoring Challenge: RSA-310 III 0 13452
180 RSA Factoring Challenge: RSA-1024 III 0 13452
181 RSA Factoring Challenge: RSA-309 III 0 13452
182 RSA Factoring Challenge: RSA-300 III 0 13452
183 RSA Factoring Challenge: RSA-232 III 0 13452
184 RSA Factoring Challenge: RSA-230 II 0 1104
185 World Record Challenge: Break 65 Bits of AES III 0 13331
186 Kryptos X 0 var
187 Dorabella X 0 var
188 D'Agapeyeff X 0 var
189 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 13352
190 Twelve-Year-Old Murder Case X 0 var
191 RSA Factoring Challenge: RSA-220 II 0 1104
192 The third ENIGMA M4 message X 0 var
193 Digital Signatures: DSA with Medium Fields III 0 13408
194 Kaskade-S/T — Part 4 II 0 1100
195 RSA Factoring Challenge: RSA-320 III 0 13452
196 RSA Factoring Challenge: RSA-330 III 0 13452
197 RSA Factoring Challenge: RSA-490 III 0 13452
198 RSA Factoring Challenge: RSA-480 III 0 13452
199 RSA Factoring Challenge: RSA-470 III 0 13452
200 RSA Factoring Challenge: RSA-1536 III 0 13452
201 RSA Factoring Challenge: RSA-500 III 0 13452
202 RSA Factoring Challenge: RSA-617 III 0 13452
203 Double Column Transposition Reloaded — Part 2 III 0 13724
204 Double Column Transposition Reloaded — Part 1 III 0 13724
205 ORYX Stream Cipher — Part 4d III 0 13638
206 RSA Factoring Challenge: RSA-2048 III 0 13452
207 RSA Factoring Challenge: RSA-460 III 0 13452
208 RSA Factoring Challenge: RSA-450 III 0 13452
209 RSA Factoring Challenge: RSA-370 III 0 13452
210 RSA Factoring Challenge: RSA-360 III 0 13452
211 RSA Factoring Challenge: RSA-350 III 0 13452
212 RSA Factoring Challenge: RSA-340 III 0 13452
213 RSA Factoring Challenge: RSA-380 III 0 13452
214 RSA Factoring Challenge: RSA-390 III 0 13452
215 RSA Factoring Challenge: RSA-440 III 0 13452
216 RSA Factoring Challenge: RSA-430 III 0 13452
217 RSA Factoring Challenge: RSA-420 III 0 13452
218 RSA Factoring Challenge: RSA-400 III 0 13452
219 Double Column Transposition Reloaded — Part 3 III 0 13724
 
 
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   +++    [11:40 - 31.05.2016] Garnet solved the Level I challenge 'Multilingual Monoalphabetic Substitution'    +++    [10:55 - 31.05.2016] Kurona solved the Level I challenge 'The Book Code: A Challenge for Bookworms'    +++    [09:00 - 31.05.2016] Kurona solved the Level I challenge 'Beaver Code'    +++    [00:26 - 31.05.2016] LuukLuuk solved the Level I challenge 'Letter to the Templars — Part 1'    +++    [21:23 - 30.05.2016] ariobarzan solved the Level I challenge 'Multilingual Monoalphabetic Substitution'    +++