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 2177 100
2 Original Caesar Cipher I 1366 100
3 Number Sequence — Part 2 I 939 100
4 Caesar Encryption I 739 100
5 Beaver Code I 489 100
6 Number Sequence — Part 3 I 440 100
7 Letter to the Templars — Part 1 I 440 100
8 Letter to the Templars — Part 2 I 365 100
9 Monoalphabetic Substitution I 351 100
10 Number Sequence — Part 4 I 349 100
11 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 300 100
12 A hidden word I 281 100
13 Factorization Cipher — Part 1 I 272 100
14 Letter to the Templars — Part 3 II 258 1121
15 Homophonic Encryption Part 1 I 246 100
16 Grille Cipher I 233 100
17 Homophonic Encryption Part 2 I 215 100
18 Cracking SHA1-Hashed Passwords II 194 1106
19 One-Time Pad with Flaws I 191 100
20 Snow White and the seven dwarfs I 163 100
21 Alice's Birthday Party (Part 1) II 150 1103
22 Alice's Birthday Party (Part 2) II 141 1103
23 Reserve Hand Procedure — Part 1 I 125 100
24 Modified Caesar Cipher I 121 100
25 From Russia with Love I 115 100
26 Letter from the Alleged Countess Julie von Ortenburg I 115 100
27 How do you become a big cryptographer? I 114 100
28 Classical Ciphers^3 I 112 100
29 Broadcasting and low exponent — RSA-Attack II 103 1108
30 Brute-Force-Attack on Triple-DES with Reduced Key Space II 101 1103
31 Not-so-Secret Message from Malawi — Part I (RSA) II 99 1103
32 Hybrid Encryption I II 91 1103
33 Pigpen with a twist — Part 1 I 91 100
34 Enigma Messages with Repeated Letters — Part 1 I 86 100
35 RSA: Two different keys — same ciphertext II 86 1109
36 Enigma Part 1 II 85 1103
37 The Book Code: A Challenge for Bookworms I 85 100
38 A Secret Message from Castle Mansfeld I 84 100
39 Molehunt (Part 1/3) I 83 100
40 Molehunt (Part 2/3) I 83 100
41 Factorization Cipher — Part 2 II 80 1111
42 A really long number sequence II 76 1109
43 Nils away on travel I 76 100
44 Kaskade-S/T — Part 1 I 73 100
45 Trifid Cipher I 71 100
46 M-138 — Part 1 I 70 101
47 Enigma Combinatorics I 66 100
48 ¿No Hablas Español? No problemo! I 66 100
49 ADFGVX — Part 2 I 64 100
50 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 I 62 100
51 Zodiac Cipher I 56 100
52 ECDH-Key Exchange for Beginners I 56 100
53 ADFGVX — Part 1 I 56 100
54 Playfair Encryption I 56 100
55 Double Columnar Transposition I 55 100
56 ORYX Stream Cipher Part I II 54 1103
57 Enigma Part 2 II 51 1103
58 Playfair with hints about the grid I 50 100
59 Factorization Cipher — Part 3 II 49 1112
60 Molehunt (Part 3/3) II 49 1103
61 Smartcard RSA II 48 1103
62 Turing Bombe Enigma I I 46 100
63 Hill Cipher with Sudoku Key I 44 100
64 BCR code (Book-Caesar-RSA) II 43 1120
65 Partial Key Exposure with RSA — Part 1 II 42 1113
66 M-138 — Part 2 II 41 1217
67 Heartbleed — Part 1 I 40 100
68 Cascading Encryption — Part 1/3 I 40 100
69 Number Sequence — Part 5 I 39 100
70 Enigma Messages I 37 100
71 An Invisible Message I 37 100
72 Enigma Messages with Repeated Letters — Part 2 I 37 100
73 Multilingual Monoalphabetic Substitution I 36 100
74 AES key — encoded in the machine readable zone of a European ePassport II 36 1112
75 Kaskade-S/T — Part 2 II 35 1105
76 Enigma Messages with Repeated Letters — Part 3 I 35 100
77 Recycled One-Time Pad I 33 100
78 The Last Note I 32 100
79 Enigma Messages with Repeated Letters — Part 5 I 32 100
80 Keyshanc — Part 1 II 30 1116
81 Unusual encryption using a diophantine equation II 30 1109
82 Monoalphabetic substitution with camouflage — Part 1 I 29 100
83 Music Code — Part 1 I 28 100
84 Enigma Messages with Repeated Letters — Part 4 I 28 100
85 Heartbleed — Part 2 I 28 100
86 Strange Message from Thessaloniki I 28 100
87 Music Code — Part 2 II 28 1107
88 ORYX Stream Cipher Part II II 27 1103
89 RSA Factoring Challenge: RSA-704 II 27 0
90 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 27 1104
91 Unconcealed RSA messages II 25 1111
92 Keyshanc — Part 2 II 23 1116
93 Not-so-Secret Message from Malawi — Part II (ECC) II 23 1103
94 Monoalphabetic substitution with camouflage — Part 4 I 23 100
95 Pigpen with a twist — Part 2 II 23 1109
96 Monoalphabetic substitution with camouflage — Part 2 II 22 1111
97 An 'unhearable' message I 22 100
98 Ku Klux Klan X 22 var
99 Number Sequence — Part 6 I 21 103
100 Kaskade-S/T — Part 3 II 21 1105
101 Monoalphabetic substitution with camouflage — Part 3 II 20 1111
102 Pigpen with a twist — Part 3 II 20 1109
103 CMEA 1 II 19 1104
104 Double Column Transposition — Part 2 II 18 1158
105 Double Column Transposition — Part 4 II 18 1160
106 RSA Factoring Challenge: RSA-210 II 17 0
107 A hidden word — Part 2 I 17 110
108 Lattice Part 1 II 16 1105
109 ORYX Stream Cipher — Part 3 (revised) II 15 1131
110 CMEA 2 III 15 13444
111 Typex — Part 1 II 14 1126
112 M-138 — Part 3 II 14 1217
113 RSA with Special d III 14 13429
114 Typex — Part 2 II 13 1128
115 Monoalphabetic Substitution with Camouflage — Part 5 II 13 1114
116 Double Column Transposition — Part 3 II 13 1158
117 Spanish Strip Cipher — Part 1 II 13 1154
118 Heartbleed — Part 3 II 12 1178
119 Double Column Transposition — Part 1 II 12 1155
120 Purple 1 II 10 1103
121 Spanish Strip Cipher — Part 2 II 10 1154
122 Cascading Encryption — Part 2/3 II 9 1128
123 Concealed Messages — Vigenère's Night Sky X 9 var
124 Cascading Encryption — Part 3/3 II 8 1128
125 Sigaba Part 1 II 7 1103
126 Number Sequence — Part 7 I 7 103
127 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2 II 6 1106
128 Akelarre Part 1 II 6 1104
129 Kaskade-S/T — Part 5 II 6 1107
130 Double Column Transposition — Part 5 II 4 1165
131 Notes of an Italian Soldier X 4 var
132 M-138 — Part 4 II 4 1217
133 ORYX Stream Cipher — Part 4a II 3 1156
134 Double Column Transposition X 2 var
135 Substitution Cipher with Non-Prefix Codes III 1 13504
136 Beale Ciphers X 1 var
137 ORYX Stream Cipher — Part 4b III 1 14205
138 Sigaba Part 2 III 1 13429
139 Unknown Author X 1 var
140 Monoalphabetic Substitution with Camouflage — Part 6 II 1 1117
141 Handycipher — Part 3 II 0 1281
142 Handycipher — Part 2 II 0 1281
143 ORYX Stream Cipher — Part 4d III 0 13881
144 ORYX Stream Cipher — Part 4c III 0 14205
145 Extended Handycipher — Part 1 II 0 1337
146 Spanish Strip Cipher — Part 3 X 0 var
147 Double Column Transposition Reloaded — Part 1 III 0 14040
148 Extended Handycipher — Part 2 II 0 1337
149 Handycipher — Part 1 II 0 1281
150 Double Column Transposition Reloaded — Part 2 III 0 14040
151 Extended Handycipher — Part 3 II 0 1337
152 Double Column Transposition Reloaded — Part 3 III 0 14040
153 RSA Factoring Challenge: RSA-1024 III 0 13592
154 RSA Factoring Challenge: RSA-260 III 0 13592
155 RSA Factoring Challenge: RSA-250 III 0 13592
156 RSA Factoring Challenge: RSA-240 III 0 13592
157 RSA Factoring Challenge: RSA-232 III 0 13592
158 RSA Factoring Challenge: RSA-270 III 0 13592
159 RSA Factoring Challenge: RSA-896 III 0 13592
160 RSA Factoring Challenge: RSA-309 III 0 13592
161 RSA Factoring Challenge: RSA-300 III 0 13592
162 RSA Factoring Challenge: RSA-290 III 0 13592
163 RSA Factoring Challenge: RSA-280 III 0 13592
164 RSA Factoring Challenge: RSA-230 II 0 1113
165 RSA Factoring Challenge: RSA-220 II 0 1113
166 World Record Challenge: Break 65 Bits of AES III 0 13429
167 Kryptos X 0 var
168 Dorabella X 0 var
169 D'Agapeyeff X 0 var
170 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 13456
171 Twelve-Year-Old Murder Case X 0 var
172 The third ENIGMA M4 message X 0 var
173 Digital Signatures: DSA with Medium Fields III 0 13531
174 Kaskade-S/T — Part 4 II 0 1107
175 RSA Factoring Challenge: RSA-310 III 0 13592
176 RSA Factoring Challenge: RSA-320 III 0 13592
177 RSA Factoring Challenge: RSA-1536 III 0 13592
178 RSA Factoring Challenge: RSA-460 III 0 13592
179 RSA Factoring Challenge: RSA-450 III 0 13592
180 RSA Factoring Challenge: RSA-440 III 0 13592
181 RSA Factoring Challenge: RSA-470 III 0 13592
182 RSA Factoring Challenge: RSA-480 III 0 13592
183 RSA Factoring Challenge: RSA-617 III 0 13592
184 RSA Factoring Challenge: RSA-500 III 0 13592
185 RSA Factoring Challenge: RSA-490 III 0 13592
186 RSA Factoring Challenge: RSA-430 III 0 13592
187 RSA Factoring Challenge: RSA-420 III 0 13592
188 RSA Factoring Challenge: RSA-360 III 0 13592
189 RSA Factoring Challenge: RSA-350 III 0 13592
190 RSA Factoring Challenge: RSA-340 III 0 13592
191 RSA Factoring Challenge: RSA-330 III 0 13592
192 RSA Factoring Challenge: RSA-370 III 0 13592
193 RSA Factoring Challenge: RSA-380 III 0 13592
194 RSA Factoring Challenge: RSA-410 III 0 13592
195 RSA Factoring Challenge: RSA-400 III 0 13592
196 RSA Factoring Challenge: RSA-390 III 0 13592
197 RSA Factoring Challenge: RSA-2048 III 0 13592
 
 
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   +++    [15:58 - 25.04.2015] NoelzzeN solved the Level I challenge 'M-138 — Part 1'    +++    [13:56 - 25.04.2015] planetlane solved the Level I challenge 'M-138 — Part 1'    +++    [13:12 - 25.04.2015] NoelzzeN solved the Level II challenge 'M-138 — Part 3'    +++    [03:33 - 25.04.2015] a.westy solved the Level I challenge 'Number Sequence'    +++    [03:29 - 25.04.2015] a.westy solved the Level I challenge 'Beaver Code'    +++