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 1746 100
2 Original Caesar Cipher I 1052 100
3 Number Sequence — Part 2 I 713 100
4 Caesar Encryption I 576 100
5 Beaver Code I 329 100
6 Number Sequence — Part 3 I 312 100
7 Letter to the Templars — Part 1 I 309 100
8 Monoalphabetic Substitution I 309 100
9 Letter to the Templars — Part 2 I 260 100
10 Number Sequence — Part 4 I 257 100
11 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 232 100
12 Homophonic Encryption Part 1 I 205 100
13 Factorization Cipher — Part 1 I 203 100
14 A hidden word I 182 100
15 Homophonic Encryption Part 2 I 180 100
16 Letter to the Templars — Part 3 II 173 1143
17 Grille Cipher I 173 100
18 One-Time Pad with Flaws I 163 100
19 Cracking SHA1-Hashed Passwords II 143 1116
20 Snow White and the seven dwarfs I 129 100
21 Alice's Birthday Party (Part 1) II 118 1111
22 Alice's Birthday Party (Part 2) II 111 1111
23 Letter from the Alleged Countess Julie von Ortenburg I 100 100
24 Reserve Hand Procedure — Part 1 I 99 100
25 Modified Caesar Cipher I 95 100
26 Classical Ciphers^3 I 93 100
27 How do you become a big cryptographer? I 86 100
28 Broadcasting and low exponent — RSA-Attack II 81 1120
29 Brute-Force-Attack on Triple-DES with Reduced Key Space II 79 1111
30 From Russia with Love I 77 101
31 Not-so-Secret Message from Malawi — Part I (RSA) II 77 1111
32 A Secret Message from Castle Mansfeld I 74 100
33 Hybrid Encryption I II 74 1112
34 Pigpen with a twist — Part 1 I 72 100
35 Molehunt (Part 2/3) I 71 100
36 Molehunt (Part 1/3) I 71 100
37 Enigma Part 1 II 69 1111
38 The Book Code: A Challenge for Bookworms I 67 100
39 RSA: Two different keys — same ciphertext II 63 1120
40 A really long number sequence II 62 1121
41 Kaskade-S/T — Part 1 I 61 100
42 Enigma Combinatorics I 56 100
43 ADFGVX — Part 2 I 54 100
44 Factorization Cipher — Part 2 II 54 1125
45 Nils away on travel I 52 100
46 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1 I 52 100
47 Enigma Messages with repeated letters — Part 1 I 51 101
48 ORYX Stream Cipher Part I II 50 1111
49 ¿No Hablas Español? No problemo! I 49 100
50 ECDH-Key Exchange for Beginners I 47 100
51 ADFGVX — Part 1 I 46 100
52 Zodiac Cipher I 46 100
53 Playfair Encryption I 41 100
54 Turing Bombe Enigma I I 41 100
55 Smartcard RSA II 40 1112
56 Enigma Part 2 II 39 1111
57 Double Columnar Transposition I 39 100
58 Molehunt (Part 3/3) II 39 1112
59 BCR code (Book-Caesar-RSA) II 35 1141
60 Playfair with hints about the grid I 34 100
61 Trifid Cipher I 33 101
62 Factorization Cipher — Part 3 II 32 1126
63 Partial Key Exposure with RSA — Part 1 II 32 1128
64 Kaskade-S/T — Part 2 II 31 1115
65 AES key — encoded in the machine readable zone of a European ePassport II 30 1127
66 Number Sequence — Part 5 I 29 100
67 Cascading Encryption — Part 1/3 I 28 100
68 Hill Cipher with Sudoku Key I 28 101
69 Keyshanc — Part 1 II 28 1133
70 An Invisible Message I 26 100
71 Multilingual Monoalphabetic Substitution I 25 100
72 ORYX Stream Cipher Part II II 25 1111
73 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 24 1114
74 Enigma Messages I 24 100
75 Unusual encryption using a diophantine equation II 24 1121
76 Monoalphabetic substitution with camouflage — Part 1 I 23 100
77 Music Code — Part 1 I 23 100
78 Not-so-Secret Message from Malawi — Part II (ECC) II 22 1111
79 Recycled One-Time Pad I 22 100
80 Unconcealed RSA messages II 22 1123
81 Music Code — Part 2 II 22 1117
82 Enigma Messages with repeated letters — Part 2 I 20 101
83 Strange Message from Thessaloniki I 20 100
84 Keyshanc — Part 2 II 20 1133
85 Monoalphabetic substitution with camouflage — Part 4 I 20 100
86 Kaskade-S/T — Part 3 II 18 1115
87 Pigpen with a twist — Part 2 II 18 1121
88 CMEA 1 II 17 1113
89 Monoalphabetic substitution with camouflage — Part 3 II 16 1125
90 Lattice Part 1 II 16 1115
91 Monoalphabetic substitution with camouflage — Part 2 II 16 1125
92 Pigpen with a twist — Part 3 II 16 1121
93 Ku Klux Klan X 15 var
94 An 'unhearable' message I 15 100
95 RSA Factoring Challenge: RSA-704 II 14 0
96 RSA with Special d III 14 13566
97 CMEA 2 III 13 13586
98 Typex — Part 1 II 13 1156
99 ORYX Stream Cipher — Part 3 (revised) II 12 1171
100 Typex — Part 2 II 11 1161
101 Enigma Messages with Repeated Letters — Part 5 I 9 150
102 Enigma Messages with Repeated Letters — Part 3 I 9 150
103 Monoalphabetic Substitution with Camouflage — Part 5 II 8 1129
104 RSA Factoring Challenge: RSA-210 II 7 0
105 Cascading Encryption — Part 2/3 II 6 1160
106 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2 II 6 1116
107 Enigma Messages with Repeated Letters — Part 4 I 6 150
108 Sigaba Part 1 II 5 1111
109 Kaskade-S/T — Part 5 II 5 1117
110 Purple 1 II 5 1112
111 Concealed Messages — Vigenère's Night Sky X 5 var
112 Akelarre Part 1 II 5 1112
113 Cascading Encryption — Part 3/3 II 5 1160
114 Notes of an Italian Soldier X 4 var
115 Double Column Transposition X 2 var
116 Beale Ciphers X 1 var
117 Substitution Cipher with Non-Prefix Codes III 1 13673
118 Unknown Author X 1 var
119 Monoalphabetic Substitution with Camouflage — Part 6 II 1 1136
120 Double Column Transposition Reloaded — Part 2 III 0 15218
121 D'Agapeyeff X 0 var
122 Dorabella X 0 var
123 Double Column Transposition Reloaded — Part 1 III 0 15218
124 World Record Challenge: Break 65 Bits of AES III 0 13566
125 Double Column Transposition Reloaded — Part 3 III 0 15218
126 Kryptos X 0 var
127 ORYX Stream Cipher — Part 4 III 0 14449
128 RSA Factoring Challenge: RSA-470 III 0 13813
129 RSA Factoring Challenge: RSA-280 III 0 13812
130 RSA Factoring Challenge: RSA-896 III 0 13812
131 RSA Factoring Challenge: RSA-270 III 0 13812
132 RSA Factoring Challenge: RSA-260 III 0 13812
133 RSA Factoring Challenge: RSA-290 III 0 13812
134 RSA Factoring Challenge: RSA-300 III 0 13812
135 RSA Factoring Challenge: RSA-310 III 0 13812
136 RSA Factoring Challenge: RSA-1024 III 0 13812
137 RSA Factoring Challenge: RSA-309 III 0 13812
138 RSA Factoring Challenge: RSA-250 III 0 13812
139 RSA Factoring Challenge: RSA-240 III 0 13812
140 Kaskade-S/T — Part 4 II 0 1117
141 The third ENIGMA M4 message X 0 var
142 Digital Signatures: DSA with Medium Fields III 0 13715
143 Twelve-Year-Old Murder Case X 0 var
144 Sigaba Part 2 III 0 13566
145 RSA Factoring Challenge: RSA-232 III 0 13812
146 RSA Factoring Challenge: RSA-230 II 0 1128
147 RSA Factoring Challenge: RSA-220 II 0 1128
148 RSA Factoring Challenge: RSA-320 III 0 13812
149 RSA Factoring Challenge: RSA-330 III 0 13812
150 RSA Factoring Challenge: RSA-1536 III 0 13813
151 RSA Factoring Challenge: RSA-460 III 0 13813
152 RSA Factoring Challenge: RSA-450 III 0 13813
153 RSA Factoring Challenge: RSA-440 III 0 13813
154 RSA Factoring Challenge: RSA-480 III 0 13813
155 RSA Factoring Challenge: RSA-490 III 0 13813
156 RSA Factoring Challenge: RSA-2048 III 0 13813
157 RSA Factoring Challenge: RSA-617 III 0 13813
158 RSA Factoring Challenge: RSA-500 III 0 13813
159 RSA Factoring Challenge: RSA-430 III 0 13813
160 RSA Factoring Challenge: RSA-420 III 0 13813
161 RSA Factoring Challenge: RSA-360 III 0 13813
162 RSA Factoring Challenge: RSA-350 III 0 13812
163 RSA Factoring Challenge: RSA-340 III 0 13812
164 RSA Factoring Challenge: RSA-370 III 0 13813
165 RSA Factoring Challenge: RSA-380 III 0 13813
166 RSA Factoring Challenge: RSA-410 III 0 13813
167 RSA Factoring Challenge: RSA-400 III 0 13813
168 RSA Factoring Challenge: RSA-390 III 0 13813
169 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 13603
 
 
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   +++    [07:40 - 07.03.2014] axelreyno solved the Level I challenge 'Letter to the Templars — Part 1'    +++    [07:27 - 07.03.2014] axelreyno solved the Level II challenge 'Letter to the Templars — Part 3'    +++    [05:43 - 07.03.2014] axelreyno solved the Level I challenge 'Letter to the Templars — Part 2'    +++    [05:06 - 07.03.2014] Monp solved the Level I challenge 'A hidden word'    +++    [22:29 - 06.03.2014] Ertheb solved the Level I challenge 'Enigma Messages with Repeated Letters — Part 4'    +++