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 1804 100
2 Original Caesar Cipher I 1091 100
3 Number Sequence — Part 2 I 745 100
4 Caesar Encryption I 602 100
5 Beaver Code I 340 100
6 Number Sequence — Part 3 I 328 100
7 Letter to the Templars — Part 1 I 320 100
8 Monoalphabetic Substitution I 311 100
9 Number Sequence — Part 4 I 270 100
10 Letter to the Templars — Part 2 I 268 100
11 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 236 100
12 Factorization Cipher — Part 1 I 214 100
13 Homophonic Encryption Part 1 I 213 100
14 A hidden word I 196 100
15 Homophonic Encryption Part 2 I 186 100
16 Letter to the Templars — Part 3 II 181 1139
17 Grille Cipher I 180 100
18 One-Time Pad with Flaws I 165 100
19 Cracking SHA1-Hashed Passwords II 147 1115
20 Snow White and the seven dwarfs I 132 100
21 Alice's Birthday Party (Part 1) II 122 1110
22 Alice's Birthday Party (Part 2) II 115 1110
23 Reserve Hand Procedure — Part 1 I 104 100
24 Letter from the Alleged Countess Julie von Ortenburg I 101 100
25 Modified Caesar Cipher I 97 100
26 Classical Ciphers^3 I 95 100
27 How do you become a big cryptographer? I 90 100
28 Broadcasting and low exponent — RSA-Attack II 85 1118
29 Brute-Force-Attack on Triple-DES with Reduced Key Space II 83 1110
30 Not-so-Secret Message from Malawi — Part I (RSA) II 82 1110
31 From Russia with Love I 80 100
32 Hybrid Encryption I II 78 1111
33 A Secret Message from Castle Mansfeld I 75 100
34 Pigpen with a twist — Part 1 I 74 100
35 Molehunt (Part 1/3) I 71 100
36 Molehunt (Part 2/3) I 71 100
37 Enigma Part 1 II 69 1110
38 The Book Code: A Challenge for Bookworms I 69 100
39 RSA: Two different keys — same ciphertext II 65 1119
40 Kaskade-S/T — Part 1 I 65 100
41 A really long number sequence II 62 1119
42 Factorization Cipher — Part 2 II 58 1123
43 Enigma Combinatorics I 57 100
44 Nils away on travel I 56 100
45 Enigma Messages with Repeated Letters — Part 1 I 55 100
46 ADFGVX — Part 2 I 54 100
47 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 I 52 100
48 ORYX Stream Cipher Part I II 50 1110
49 ¿No Hablas Español? No problemo! I 49 100
50 ECDH-Key Exchange for Beginners I 49 100
51 Zodiac Cipher I 46 100
52 ADFGVX — Part 1 I 46 100
53 Playfair Encryption I 42 100
54 Smartcard RSA II 41 1110
55 Turing Bombe Enigma I I 41 100
56 Trifid Cipher I 40 101
57 Molehunt (Part 3/3) II 39 1110
58 Double Columnar Transposition I 39 100
59 Enigma Part 2 II 39 1110
60 BCR code (Book-Caesar-RSA) II 35 1137
61 Factorization Cipher — Part 3 II 35 1124
62 Playfair with hints about the grid I 35 100
63 Partial Key Exposure with RSA — Part 1 II 34 1126
64 Kaskade-S/T — Part 2 II 32 1114
65 Hill Cipher with Sudoku Key I 31 100
66 AES key — encoded in the machine readable zone of a European ePassport II 30 1125
67 Cascading Encryption — Part 1/3 I 29 100
68 Number Sequence — Part 5 I 29 100
69 Keyshanc — Part 1 II 28 1130
70 An Invisible Message I 27 100
71 Multilingual Monoalphabetic Substitution I 25 100
72 Enigma Messages I 25 100
73 Unusual encryption using a diophantine equation II 25 1119
74 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 25 1112
75 ORYX Stream Cipher Part II II 25 1110
76 Monoalphabetic substitution with camouflage — Part 1 I 24 100
77 Enigma Messages with Repeated Letters — Part 2 I 24 101
78 Music Code — Part 1 I 23 100
79 Unconcealed RSA messages II 23 1122
80 Not-so-Secret Message from Malawi — Part II (ECC) II 22 1110
81 Music Code — Part 2 II 22 1116
82 Recycled One-Time Pad I 22 100
83 Keyshanc — Part 2 II 21 1130
84 Monoalphabetic substitution with camouflage — Part 4 I 20 100
85 Strange Message from Thessaloniki I 20 100
86 Kaskade-S/T — Part 3 II 19 1114
87 Pigpen with a twist — Part 2 II 18 1119
88 Enigma Messages with Repeated Letters — Part 3 I 18 102
89 CMEA 1 II 17 1111
90 RSA Factoring Challenge: RSA-704 II 17 0
91 Pigpen with a twist — Part 3 II 16 1119
92 Lattice Part 1 II 16 1114
93 Enigma Messages with Repeated Letters — Part 5 I 16 102
94 Ku Klux Klan X 16 var
95 Monoalphabetic substitution with camouflage — Part 3 II 16 1123
96 Monoalphabetic substitution with camouflage — Part 2 II 16 1123
97 Enigma Messages with Repeated Letters — Part 4 I 15 102
98 An 'unhearable' message I 15 100
99 RSA with Special d III 14 13547
100 CMEA 2 III 13 13567
101 ORYX Stream Cipher — Part 3 (revised) II 13 1163
102 Typex — Part 1 II 13 1151
103 Typex — Part 2 II 11 1155
104 Spanish Strip Cipher — Part 1 II 10 1341
105 Monoalphabetic Substitution with Camouflage — Part 5 II 8 1127
106 RSA Factoring Challenge: RSA-210 II 8 0
107 Spanish Strip Cipher — Part 2 II 8 1341
108 Concealed Messages — Vigenère's Night Sky X 7 var
109 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2 II 6 1115
110 Purple 1 II 6 1110
111 Cascading Encryption — Part 2/3 II 6 1154
112 Sigaba Part 1 II 5 1110
113 Cascading Encryption — Part 3/3 II 5 1154
114 Akelarre Part 1 II 5 1111
115 Kaskade-S/T — Part 5 II 5 1116
116 Notes of an Italian Soldier X 4 var
117 Double Column Transposition — Part 1 II 3 1378
118 Double Column Transposition X 2 var
119 Substitution Cipher with Non-Prefix Codes III 1 13650
120 Beale Ciphers X 1 var
121 Monoalphabetic Substitution with Camouflage — Part 6 II 1 1133
122 Unknown Author X 1 var
123 ORYX Stream Cipher — Part 4b III 0 17182
124 Spanish Strip Cipher — Part 3 X 0 var
125 ORYX Stream Cipher — Part 4c III 0 17182
126 ORYX Stream Cipher — Part 4a II 0 1469
127 Double Column Transposition Reloaded — Part 3 III 0 14878
128 Double Column Transposition Reloaded — Part 2 III 0 14878
129 Double Column Transposition Reloaded — Part 1 III 0 14878
130 ORYX Stream Cipher — Part 4d III 0 14340
131 RSA Factoring Challenge: RSA-230 II 0 1125
132 RSA Factoring Challenge: RSA-260 III 0 13780
133 RSA Factoring Challenge: RSA-250 III 0 13780
134 RSA Factoring Challenge: RSA-240 III 0 13780
135 RSA Factoring Challenge: RSA-232 III 0 13780
136 RSA Factoring Challenge: RSA-270 III 0 13780
137 RSA Factoring Challenge: RSA-896 III 0 13780
138 RSA Factoring Challenge: RSA-309 III 0 13780
139 RSA Factoring Challenge: RSA-300 III 0 13780
140 RSA Factoring Challenge: RSA-290 III 0 13780
141 RSA Factoring Challenge: RSA-280 III 0 13780
142 Sigaba Part 2 III 0 13547
143 RSA Factoring Challenge: RSA-220 II 0 1125
144 World Record Challenge: Break 65 Bits of AES III 0 13547
145 Kryptos X 0 var
146 Dorabella X 0 var
147 D'Agapeyeff X 0 var
148 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 13582
149 Twelve-Year-Old Murder Case X 0 var
150 The third ENIGMA M4 message X 0 var
151 Digital Signatures: DSA with Medium Fields III 0 13689
152 Kaskade-S/T — Part 4 II 0 1116
153 RSA Factoring Challenge: RSA-1024 III 0 13780
154 RSA Factoring Challenge: RSA-310 III 0 13780
155 RSA Factoring Challenge: RSA-460 III 0 13780
156 RSA Factoring Challenge: RSA-450 III 0 13780
157 RSA Factoring Challenge: RSA-440 III 0 13780
158 RSA Factoring Challenge: RSA-430 III 0 13780
159 RSA Factoring Challenge: RSA-1536 III 0 13780
160 RSA Factoring Challenge: RSA-470 III 0 13780
161 RSA Factoring Challenge: RSA-617 III 0 13780
162 RSA Factoring Challenge: RSA-500 III 0 13780
163 RSA Factoring Challenge: RSA-490 III 0 13780
164 RSA Factoring Challenge: RSA-480 III 0 13780
165 RSA Factoring Challenge: RSA-420 III 0 13780
166 RSA Factoring Challenge: RSA-410 III 0 13780
167 RSA Factoring Challenge: RSA-350 III 0 13780
168 RSA Factoring Challenge: RSA-340 III 0 13780
169 RSA Factoring Challenge: RSA-330 III 0 13780
170 RSA Factoring Challenge: RSA-320 III 0 13780
171 RSA Factoring Challenge: RSA-360 III 0 13780
172 RSA Factoring Challenge: RSA-370 III 0 13780
173 RSA Factoring Challenge: RSA-400 III 0 13780
174 RSA Factoring Challenge: RSA-390 III 0 13780
175 RSA Factoring Challenge: RSA-380 III 0 13780
176 RSA Factoring Challenge: RSA-2048 III 0 13780
 
 
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   +++    [22:43 - 24.04.2014] Kruxi solved the Level I challenge 'A Secret Message from Castle Mansfeld'    +++    [20:58 - 24.04.2014] Kruxi solved the Level I challenge 'Number Sequence'    +++    [20:51 - 24.04.2014] Kruxi solved the Level I challenge 'Monoalphabetic Substitution'    +++    [20:19 - 24.04.2014] frasermac solved the Level I challenge 'Letter to the Templars — Part 2'    +++    [14:02 - 24.04.2014] palini solved the Level I challenge 'Number Sequence'    +++