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.

In addition MysteryTwister C3 offers various raffles each month. You can find information about the current raffle here. For example it’s possible to win Amazon coupons, trophies, coffee cups or T-shirts.


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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 2120 100
2 Original Caesar Cipher I 1327 100
3 Number Sequence — Part 2 I 909 100
4 Caesar Encryption I 711 100
5 Beaver Code I 466 100
6 Number Sequence — Part 3 I 424 100
7 Letter to the Templars — Part 1 I 418 100
8 Letter to the Templars — Part 2 I 345 100
9 Monoalphabetic Substitution I 344 100
10 Number Sequence — Part 4 I 335 100
11 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 289 100
12 A hidden word I 271 100
13 Factorization Cipher — Part 1 I 265 100
14 Letter to the Templars — Part 3 II 243 1123
15 Homophonic Encryption Part 1 I 242 100
16 Grille Cipher I 226 100
17 Homophonic Encryption Part 2 I 212 100
18 Cracking SHA1-Hashed Passwords II 188 1107
19 One-Time Pad with Flaws I 187 100
20 Snow White and the seven dwarfs I 159 100
21 Alice's Birthday Party (Part 1) II 143 1104
22 Alice's Birthday Party (Part 2) II 136 1104
23 Reserve Hand Procedure — Part 1 I 121 100
24 Modified Caesar Cipher I 116 100
25 Letter from the Alleged Countess Julie von Ortenburg I 114 100
26 From Russia with Love I 111 100
27 Classical Ciphers^3 I 110 100
28 How do you become a big cryptographer? I 108 100
29 Broadcasting and low exponent — RSA-Attack II 99 1109
30 Brute-Force-Attack on Triple-DES with Reduced Key Space II 97 1104
31 Not-so-Secret Message from Malawi — Part I (RSA) II 95 1104
32 Pigpen with a twist — Part 1 I 88 100
33 Hybrid Encryption I II 88 1104
34 A Secret Message from Castle Mansfeld I 84 100
35 The Book Code: A Challenge for Bookworms I 83 100
36 Molehunt (Part 2/3) I 82 100
37 Molehunt (Part 1/3) I 82 100
38 Enigma Part 1 II 81 1104
39 Enigma Messages with Repeated Letters — Part 1 I 81 100
40 RSA: Two different keys — same ciphertext II 78 1110
41 Factorization Cipher — Part 2 II 77 1113
42 Nils away on travel I 74 100
43 Kaskade-S/T — Part 1 I 72 100
44 A really long number sequence II 71 1110
45 Trifid Cipher I 66 100
46 Enigma Combinatorics I 65 100
47 ¿No Hablas Español? No problemo! I 63 100
48 ADFGVX — Part 2 I 62 100
49 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 I 59 100
50 ECDH-Key Exchange for Beginners I 56 100
51 ADFGVX — Part 1 I 55 100
52 Zodiac Cipher I 54 100
53 ORYX Stream Cipher Part I II 54 1104
54 Playfair Encryption I 54 100
55 Double Columnar Transposition I 52 100
56 M-138 — Part 1 I 50 101
57 Playfair with hints about the grid I 50 100
58 Molehunt (Part 3/3) II 49 1104
59 Enigma Part 2 II 49 1104
60 Factorization Cipher — Part 3 II 47 1114
61 Smartcard RSA II 46 1104
62 Turing Bombe Enigma I I 44 100
63 Hill Cipher with Sudoku Key I 41 100
64 BCR code (Book-Caesar-RSA) II 41 1122
65 Partial Key Exposure with RSA — Part 1 II 41 1115
66 Cascading Encryption — Part 1/3 I 39 100
67 Number Sequence — Part 5 I 38 100
68 An Invisible Message I 36 100
69 Enigma Messages I 36 100
70 Enigma Messages with Repeated Letters — Part 2 I 35 100
71 Kaskade-S/T — Part 2 II 35 1106
72 AES key — encoded in the machine readable zone of a European ePassport II 34 1114
73 Multilingual Monoalphabetic Substitution I 34 100
74 Enigma Messages with Repeated Letters — Part 3 I 33 100
75 M-138 — Part 2 II 32 1258
76 Recycled One-Time Pad I 31 100
77 Heartbleed — Part 1 I 31 101
78 Enigma Messages with Repeated Letters — Part 5 I 31 100
79 Unusual encryption using a diophantine equation II 30 1110
80 Keyshanc — Part 1 II 30 1118
81 The Last Note I 29 101
82 Monoalphabetic substitution with camouflage — Part 1 I 28 100
83 Music Code — Part 2 II 28 1108
84 Music Code — Part 1 I 28 100
85 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 27 1105
86 Enigma Messages with Repeated Letters — Part 4 I 27 100
87 ORYX Stream Cipher Part II II 27 1104
88 Strange Message from Thessaloniki I 27 100
89 RSA Factoring Challenge: RSA-704 II 25 0
90 Unconcealed RSA messages II 25 1112
91 Pigpen with a twist — Part 2 II 23 1110
92 Not-so-Secret Message from Malawi — Part II (ECC) II 23 1104
93 Monoalphabetic substitution with camouflage — Part 4 I 23 100
94 Keyshanc — Part 2 II 23 1118
95 Ku Klux Klan X 22 var
96 Heartbleed — Part 2 I 22 101
97 An 'unhearable' message I 21 100
98 Monoalphabetic substitution with camouflage — Part 2 II 21 1113
99 Kaskade-S/T — Part 3 II 21 1106
100 Monoalphabetic substitution with camouflage — Part 3 II 20 1113
101 Pigpen with a twist — Part 3 II 19 1110
102 Double Column Transposition — Part 4 II 18 1169
103 Double Column Transposition — Part 2 II 18 1166
104 CMEA 1 II 17 1105
105 Lattice Part 1 II 16 1107
106 RSA Factoring Challenge: RSA-210 II 15 0
107 Typex — Part 1 II 14 1129
108 ORYX Stream Cipher — Part 3 (revised) II 14 1134
109 RSA with Special d III 14 13444
110 CMEA 2 III 14 13460
111 Typex — Part 2 II 13 1131
112 Monoalphabetic Substitution with Camouflage — Part 5 II 13 1115
113 Spanish Strip Cipher — Part 1 II 13 1160
114 Double Column Transposition — Part 3 II 13 1166
115 Heartbleed — Part 3 II 12 1191
116 M-138 — Part 3 II 12 1258
117 Double Column Transposition — Part 1 II 12 1161
118 Purple 1 II 10 1104
119 Cascading Encryption — Part 2/3 II 9 1130
120 Spanish Strip Cipher — Part 2 II 9 1160
121 Concealed Messages — Vigenère's Night Sky X 9 var
122 Cascading Encryption — Part 3/3 II 8 1130
123 Akelarre Part 1 II 6 1104
124 Sigaba Part 1 II 6 1104
125 Kaskade-S/T — Part 5 II 6 1108
126 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2 II 6 1107
127 Double Column Transposition — Part 5 II 4 1175
128 Notes of an Italian Soldier X 4 var
129 ORYX Stream Cipher — Part 4a II 3 1163
130 M-138 — Part 4 II 3 1258
131 Double Column Transposition X 2 var
132 Monoalphabetic Substitution with Camouflage — Part 6 II 1 1119
133 Beale Ciphers X 1 var
134 Unknown Author X 1 var
135 Substitution Cipher with Non-Prefix Codes III 1 13522
136 ORYX Stream Cipher — Part 4b III 0 14298
137 ORYX Stream Cipher — Part 4c III 0 14298
138 Spanish Strip Cipher — Part 3 X 0 var
139 Double Column Transposition Reloaded — Part 3 III 0 14105
140 Double Column Transposition Reloaded — Part 1 III 0 14105
141 Double Column Transposition Reloaded — Part 2 III 0 14105
142 ORYX Stream Cipher — Part 4d III 0 13926
143 RSA Factoring Challenge: RSA-896 III 0 13615
144 RSA Factoring Challenge: RSA-260 III 0 13615
145 RSA Factoring Challenge: RSA-250 III 0 13615
146 RSA Factoring Challenge: RSA-240 III 0 13615
147 RSA Factoring Challenge: RSA-232 III 0 13615
148 RSA Factoring Challenge: RSA-270 III 0 13615
149 Sigaba Part 2 III 0 13444
150 RSA Factoring Challenge: RSA-309 III 0 13615
151 RSA Factoring Challenge: RSA-300 III 0 13615
152 RSA Factoring Challenge: RSA-290 III 0 13615
153 RSA Factoring Challenge: RSA-280 III 0 13615
154 RSA Factoring Challenge: RSA-230 II 0 1115
155 RSA Factoring Challenge: RSA-220 II 0 1115
156 World Record Challenge: Break 65 Bits of AES III 0 13444
157 Kryptos X 0 var
158 Dorabella X 0 var
159 D'Agapeyeff X 0 var
160 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 13472
161 Twelve-Year-Old Murder Case X 0 var
162 The third ENIGMA M4 message X 0 var
163 Digital Signatures: DSA with Medium Fields III 0 13551
164 Kaskade-S/T — Part 4 II 0 1108
165 RSA Factoring Challenge: RSA-1024 III 0 13615
166 RSA Factoring Challenge: RSA-310 III 0 13615
167 RSA Factoring Challenge: RSA-460 III 0 13615
168 RSA Factoring Challenge: RSA-450 III 0 13615
169 RSA Factoring Challenge: RSA-440 III 0 13615
170 RSA Factoring Challenge: RSA-430 III 0 13615
171 RSA Factoring Challenge: RSA-1536 III 0 13615
172 RSA Factoring Challenge: RSA-470 III 0 13615
173 RSA Factoring Challenge: RSA-617 III 0 13615
174 RSA Factoring Challenge: RSA-500 III 0 13615
175 RSA Factoring Challenge: RSA-490 III 0 13615
176 RSA Factoring Challenge: RSA-480 III 0 13615
177 RSA Factoring Challenge: RSA-420 III 0 13615
178 RSA Factoring Challenge: RSA-410 III 0 13615
179 RSA Factoring Challenge: RSA-350 III 0 13615
180 RSA Factoring Challenge: RSA-340 III 0 13615
181 RSA Factoring Challenge: RSA-330 III 0 13615
182 RSA Factoring Challenge: RSA-320 III 0 13615
183 RSA Factoring Challenge: RSA-360 III 0 13615
184 RSA Factoring Challenge: RSA-370 III 0 13615
185 RSA Factoring Challenge: RSA-400 III 0 13615
186 RSA Factoring Challenge: RSA-390 III 0 13615
187 RSA Factoring Challenge: RSA-380 III 0 13615
188 RSA Factoring Challenge: RSA-2048 III 0 13615
 
 
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   +++    [22:15 - 02.03.2015] kiekuk solved the Level II challenge 'Cracking SHA1-Hashed Passwords'    +++    [18:58 - 02.03.2015] RohitFTW solved the Level I challenge 'Original Caesar Cipher'    +++    [18:05 - 02.03.2015] RohitFTW solved the Level I challenge 'Number Sequence'    +++    [17:50 - 02.03.2015] kiekuk solved the Level I challenge 'One-Time Pad with Flaws'    +++    [16:16 - 02.03.2015] Cl3v3r solved the Level II challenge 'ORYX Stream Cipher Part II'    +++