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 2637 100
2 Original Caesar Cipher I 1688 100
3 Number Sequence — Part 2 I 1176 100
4 Caesar Encryption I 874 100
5 Beaver Code I 637 100
6 Letter to the Templars — Part 1 I 582 100
7 Number Sequence — Part 3 I 537 100
8 Letter to the Templars — Part 2 I 468 100
9 Number Sequence — Part 4 I 426 100
10 Monoalphabetic Substitution I 397 100
11 A hidden word I 384 100
12 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 351 100
13 Letter to the Templars — Part 3 II 350 1108
14 Factorization Cipher — Part 1 I 312 100
15 Grille Cipher I 277 100
16 Homophonic Encryption Part 1 I 275 100
17 Cracking SHA1-Hashed Passwords II 247 1098
18 Homophonic Encryption Part 2 I 239 100
19 One-Time Pad with Flaws I 216 100
20 Snow White and the seven dwarfs I 198 100
21 Alice's Birthday Party (Part 1) II 171 1096
22 Alice's Birthday Party (Part 2) II 163 1096
23 From Russia with Love I 148 100
24 Reserve Hand Procedure — Part 1 I 142 100
25 Modified Caesar Cipher I 142 100
26 How do you become a big cryptographer? I 135 100
27 Letter from the Alleged Countess Julie von Ortenburg I 131 100
28 Broadcasting and low exponent — RSA-Attack II 127 1100
29 Classical Ciphers^3 I 126 100
30 Not-so-Secret Message from Malawi — Part I (RSA) II 116 1096
31 Enigma Messages with Repeated Letters — Part 1 I 109 100
32 Brute-Force-Attack on Triple-DES with Reduced Key Space II 106 1096
33 Pigpen with a twist — Part 1 I 105 100
34 M-138 — Part 1 I 101 100
35 Hybrid Encryption I II 100 1096
36 The Book Code: A Challenge for Bookworms I 100 100
37 RSA: Two different keys — same ciphertext II 99 1100
38 Factorization Cipher — Part 2 II 96 1102
39 A Secret Message from Castle Mansfeld I 96 100
40 Enigma Part 1 II 95 1096
41 Molehunt (Part 1/3) I 95 100
42 Nils away on travel I 94 100
43 Number Sequence — Part 8 I 94 100
44 Molehunt (Part 2/3) I 93 100
45 A really long number sequence II 84 1101
46 Trifid Cipher I 81 100
47 Kaskade-S/T — Part 1 I 79 100
48 ADFGVX — Part 2 I 79 100
49 ¿No Hablas Español? No problemo! I 76 100
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 67 100
54 Double Columnar Transposition I 66 100
55 Playfair with hints about the grid 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 1096
59 Enigma Part 2 II 60 1096
60 Heartbleed — Part 1 I 59 100
61 Factorization Cipher — Part 3 II 58 1103
62 M-138 — Part 2 II 58 1138
63 Molehunt (Part 3/3) II 55 1096
64 Number Sequence — Part 6 I 53 100
65 Smartcard RSA II 53 1096
66 Partial Key Exposure with RSA — Part 1 II 52 1103
67 Enigma Messages with Repeated Letters — Part 2 I 50 100
68 Enigma Messages with Repeated Letters — Part 3 I 50 100
69 Turing Bombe Enigma I I 49 100
70 The Last Note I 49 100
71 A hidden word — Part 2 I 49 100
72 Hill Cipher with Sudoku Key I 49 100
73 Number Sequence — Part 5 I 48 100
74 BCR code (Book-Caesar-RSA) II 47 1107
75 Enigma Messages I 47 100
76 Cascading Encryption — Part 1/3 I 46 100
77 Enigma Messages with Repeated Letters — Part 5 I 46 100
78 Multilingual Monoalphabetic Substitution I 45 100
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 1103
81 An Invisible Message I 41 100
82 Recycled One-Time Pad I 41 100
83 Heartbleed — Part 2 I 41 100
84 Monoalphabetic substitution with camouflage — Part 1 I 38 100
85 Unusual encryption using a diophantine equation II 36 1101
86 Kaskade-S/T — Part 2 II 36 1098
87 ORYX Stream Cipher Part II II 35 1096
88 Image Noise I 35 100
89 Keyshanc — Part 1 II 34 1105
90 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 32 1097
91 Strange Message from Thessaloniki I 32 100
92 Music Code — Part 1 I 31 100
93 Music Code — Part 2 II 31 1099
94 News from Castle Mansfeld I 30 100
95 Unconcealed RSA messages II 30 1102
96 Monoalphabetic substitution with camouflage — Part 4 I 30 100
97 Ku Klux Klan X 29 var
98 Pigpen with a twist — Part 2 II 29 1101
99 An 'unhearable' message I 28 100
100 Double Column Transposition — Part 4 II 28 1126
101 Monoalphabetic substitution with camouflage — Part 2 II 28 1102
102 Keyshanc — Part 2 II 27 1105
103 RSA Factoring Challenge: RSA-704 II 27 0
104 Number Sequence — Part 7 I 26 100
105 Monoalphabetic substitution with camouflage — Part 3 II 26 1102
106 Double Column Transposition — Part 2 II 25 1125
107 Not-so-Secret Message from Malawi — Part II (ECC) II 25 1096
108 Weakened Granit — Part 1 I 24 100
109 Pigpen with a twist — Part 3 II 24 1101
110 New Year's Greetings — Part 2 I 22 101
111 M-138 — Part 3 II 22 1138
112 Double Column Transposition — Part 3 II 22 1125
113 New Year's Greetings — Part 1 I 22 101
114 CMEA 1 II 22 1097
115 Kaskade-S/T — Part 3 II 22 1098
116 ORYX Stream Cipher — Part 3 (revised) II 21 1114
117 New Year's Greetings — Part 3 I 20 101
118 New Year's Greetings — Part 4 I 20 101
119 Heartbleed — Part 3 II 19 1131
120 RSA Factoring Challenge: RSA-210 II 19 0
121 Lattice Part 1 II 18 1098
122 Typex — Part 1 II 17 1111
123 Monoalphabetic Substitution with Camouflage — Part 5 II 17 1104
124 Spanish Strip Cipher — Part 1 II 17 1124
125 CMEA 2 III 16 13330
126 Double Column Transposition — Part 1 II 16 1124
127 RSA with Special d III 16 13319
128 Typex — Part 2 II 15 1112
129 Spanish Strip Cipher — Part 2 II 14 1124
130 Concealed Messages — Vigenère's Night Sky X 14 var
131 Purple 1 II 11 1096
132 Cascading Encryption — Part 2/3 II 10 1112
133 Cascading Encryption — Part 3/3 II 10 1112
134 Sigaba Part 1 II 9 1096
135 Weakened Handycipher — Part 1 II 8 1149
136 Flawed Usage of a OTP Cipher by the BND II 8 1161
137 Weakened Handycipher — Part 3 II 8 1149
138 Kaskade-S/T — Part 5 II 8 1099
139 ASAC — A Strong(er) ADFGVX Cipher — Part 1 II 7 1398
140 Weakened Handycipher — Part 2 II 7 1149
141 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2 II 7 1099
142 New Year's Greetings — Part 5 II 7 1214
143 Akelarre Part 1 II 7 1097
144 ORYX Stream Cipher — Part 4a II 6 1124
145 M-138 — Part 4 II 6 1138
146 Double Column Transposition — Part 5 II 4 1127
147 Notes of an Italian Soldier X 4 var
148 Handycipher — Part 3 III 2 14028
149 Handycipher — Part 2 II 2 1143
150 Sigaba Part 2 III 2 13319
151 Double Column Transposition X 2 var
152 Unknown Author X 2 var
153 Handycipher — Part 1 II 2 1143
154 Beale Ciphers X 1 var
155 Weakened Handycipher — Part 4 II 1 1341
156 Extended Handycipher — Part 1 II 1 1145
157 Extended Handycipher — Part 2 II 1 1145
158 Extended Handycipher — Part 3 II 1 1145
159 ORYX Stream Cipher — Part 4b III 1 13763
160 Spirale — Part 1 II 1 1161
161 Substitution Cipher with Non-Prefix Codes III 1 13374
162 Spirale — Part 3 II 1 1161
163 Monoalphabetic Substitution with Camouflage — Part 6 II 1 1106
164 Spirale — Part 2 II 1 1161
165 Handycipher — Part 4 III 0 16165
166 Weakened Handycipher — Part 6 II 0 1341
167 Weakened Handycipher — Part 5 II 0 1341
168 Extended Handycipher — Part 6 III 0 16165
169 ASAC — A Strong(er) ADFGVX Cipher — Part 2 II 0 1398
170 ASAC — A Strong(er) ADFGVX Cipher — Part 3 II 0 1398
171 ASAC — A Strong(er) ADFGVX Cipher — Part 5 II 0 1398
172 ASAC — A Strong(er) ADFGVX Cipher — Part 4 II 0 1398
173 Extended Handycipher — Part 5 III 0 16165
174 Extended Handycipher — Part 4 III 0 16165
175 Spirale — Part 4 II 0 1161
176 Double-Column Transposition/Granit — Part 3 II 0 1154
177 Double-Column Transposition/Granit — Part 2 II 0 1154
178 Weakened Granit — Part 2 II 0 1165
179 Weakened Granit — Part 3 II 0 1165
180 Handycipher — Part 6 III 0 16165
181 Handycipher — Part 5 III 0 16165
182 Double-Column Transposition/Granit — Part 1 II 0 1154
183 RSA Factoring Challenge: RSA-470 III 0 13436
184 RSA Factoring Challenge: RSA-896 III 0 13436
185 RSA Factoring Challenge: RSA-280 III 0 13436
186 RSA Factoring Challenge: RSA-270 III 0 13436
187 RSA Factoring Challenge: RSA-260 III 0 13436
188 RSA Factoring Challenge: RSA-250 III 0 13436
189 RSA Factoring Challenge: RSA-290 III 0 13436
190 RSA Factoring Challenge: RSA-300 III 0 13436
191 RSA Factoring Challenge: RSA-320 III 0 13436
192 RSA Factoring Challenge: RSA-310 III 0 13436
193 RSA Factoring Challenge: RSA-1024 III 0 13436
194 RSA Factoring Challenge: RSA-309 III 0 13436
195 RSA Factoring Challenge: RSA-240 III 0 13436
196 RSA Factoring Challenge: RSA-232 III 0 13436
197 World Record Challenge: Break 65 Bits of AES III 0 13319
198 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 13339
199 Kryptos X 0 var
200 Dorabella X 0 var
201 D'Agapeyeff X 0 var
202 Twelve-Year-Old Murder Case X 0 var
203 Kaskade-S/T — Part 4 II 0 1099
204 RSA Factoring Challenge: RSA-230 II 0 1103
205 RSA Factoring Challenge: RSA-220 II 0 1103
206 The third ENIGMA M4 message X 0 var
207 Digital Signatures: DSA with Medium Fields III 0 13394
208 RSA Factoring Challenge: RSA-330 III 0 13436
209 RSA Factoring Challenge: RSA-340 III 0 13436
210 RSA Factoring Challenge: RSA-500 III 0 13436
211 RSA Factoring Challenge: RSA-617 III 0 13436
212 RSA Factoring Challenge: RSA-490 III 0 13436
213 RSA Factoring Challenge: RSA-480 III 0 13436
214 RSA Factoring Challenge: RSA-1536 III 0 13436
215 RSA Factoring Challenge: RSA-2048 III 0 13436
216 ORYX Stream Cipher — Part 4d III 0 13613
217 Spanish Strip Cipher — Part 3 X 0 var
218 Double Column Transposition Reloaded — Part 3 III 0 13693
219 Double Column Transposition Reloaded — Part 2 III 0 13693
220 Double Column Transposition Reloaded — Part 1 III 0 13693
221 RSA Factoring Challenge: RSA-460 III 0 13436
222 RSA Factoring Challenge: RSA-450 III 0 13436
223 RSA Factoring Challenge: RSA-380 III 0 13436
224 RSA Factoring Challenge: RSA-370 III 0 13436
225 RSA Factoring Challenge: RSA-360 III 0 13436
226 RSA Factoring Challenge: RSA-350 III 0 13436
227 RSA Factoring Challenge: RSA-390 III 0 13436
228 RSA Factoring Challenge: RSA-400 III 0 13436
229 RSA Factoring Challenge: RSA-440 III 0 13436
230 RSA Factoring Challenge: RSA-430 III 0 13436
231 RSA Factoring Challenge: RSA-420 III 0 13436
232 RSA Factoring Challenge: RSA-410 III 0 13436
233 ORYX Stream Cipher — Part 4c III 0 13763
 
 
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   +++    [01:52 - 27.07.2016] Mash422 solved the Level I challenge 'Original Caesar Cipher'    +++    [01:49 - 27.07.2016] Puapal solved the Level I challenge 'Number Sequence — Part 8'    +++    [01:33 - 27.07.2016] Mash422 solved the Level I challenge 'Number Sequence'    +++    [01:32 - 27.07.2016] Puapal solved the Level I challenge 'A hidden word'    +++    [07:22 - 26.07.2016] XP-72 solved the Level I challenge 'Affine Codes / Modulo Arithmetic with N / Extended Euclid'    +++