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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
	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.
	You might want to try some of these The following table provides you with the list of all currently available challenges, excluding those you already solved if you are logged in -- 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! 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 886 100 2 Original Caesar Cipher I 426 100 3 Caesar Encryption I 273 100 4 Number Sequence - Part 2 I 206 100 5 Monoalphabetic Substitution I 182 100 6 Homophonic Encryption Part 1 I 107 100 7 Homophonic Encryption Part 2 I 98 100 8 One-Time Pad with Flaws I 92 100 9 Affine Codes / Modulo Arithmetic with N / Extended Euclid I 90 100 10 Factorization Cipher - Part 1 I 85 100 11 Alice's Birthday Party (Part 1) II 71 1000 12 Alice's Birthday Party (Part 2) II 70 1000 13 Letter from the Alleged Countess Julie von Ortenburg I 61 100 14 Number Sequence - Part 3 I 60 102 15 Grille Cipher I 57 100 16 Classical Ciphers^3 I 54 100 17 Cracking SHA1-Hashed Passwords II 53 1000 18 Brute-Force-Attack on Triple-DES with Reduced Key Space II 49 1000 19 A Secret Message from Castle Mansfeld I 49 100 20 Modified Caesar Cipher I 43 100 21 Not-so-Secret Message from Malawi – Part I (RSA) II 42 1000 22 Enigma Part 1 II 40 1000 23 Hybrid Encryption I II 39 1000 24 Broadcasting and low exponent - RSA-Attack II 39 1000 25 Molehunt (Part 2/3) I 38 100 26 Molehunt (Part 1/3) I 37 100 27 Kaskade-S/T – Part 1 I 35 100 28 Number Sequence - Part 4 I 33 103 29 Pigpen with a twist - Part 1 I 32 100 30 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System - Part 1 I 32 100 31 A really long number sequence II 31 1000 32 RSA: Two different keys - same ciphertext II 31 1000 33 The Book Code: A Challenge for Bookworms I 30 102 34 Zodiac Cipher I 29 100 35 ORYX Stream Cipher Part I II 29 1000 36 Enigma Combinatorics I 28 100 37 ADFGVX - Part 2 I 27 100 38 Smartcard RSA II 25 1000 39 Molehunt (Part 3/3) II 23 1000 40 Factorization Cipher - Part 2 II 23 1010 41 ECDH-Key Exchange for Beginners I 22 101 42 ADFGVX - Part 1 I 22 100 43 Turing Bombe Enigma I I 20 100 44 Enigma Part 2 II 19 1000 45 Partial Key Exposure with RSA – Part 1 II 18 1010 46 An Invisible Message I 18 100 47 Playfair Encryption I 18 100 48 Lunchtime Attack on the Fully Homomorphic Encryption Scheme II 17 1000 49 ¿No Hablas Español? No problemo! I 17 103 50 Double Columnar Transposition I 16 100 51 AES key - encoded in the machine readable zone of a European ePassport II 15 1010 52 Kaskade-S/T – Part 2 II 15 1000 53 Lattice Part 1 II 14 1000 54 Unusual encryption using a diophantine equation II 14 1000 55 Music Code - Part 1 I 14 100 56 Factorization Cipher - Part 3 II 14 1010 57 ORYX Stream Cipher Part II II 14 1000 58 Not-so-Secret Message from Malawi – Part II (ECC) II 13 1000 59 Music Code - Part 2 II 12 1000 60 Unconcealed RSA messages II 11 1000 61 Monoalphabetic substitution with camouflage - Part 2 II 9 1010 62 Kaskade-S/T – Part 3 II 9 1000 63 CMEA 1 II 9 1000 64 Pigpen with a twist - Part 3 II 8 1000 65 Pigpen with a twist - Part 2 II 8 1000 66 Monoalphabetic substitution with camouflage - Part 3 II 8 1010 67 Monoalphabetic substitution with camouflage - Part 4 I 8 101 68 Monoalphabetic substitution with camouflage - Part 1 I 7 100 69 Number Sequence - Part 5 I 6 103 70 CMEA 2 III 6 10000 71 RSA with Special d III 6 10000 72 Monoalphabetic Substitution with Camouflage - Part 5 II 6 1010 73 Ku Klux Klan X 5 var 74 Post-Quantum Cryptography: Unbalanced Oil and Vinegar System - Part 2 II 3 1000 75 Purple 1 II 3 1000 76 Concealed Messages - Vigenère's Night Sky X 3 var 77 Akelarre Part 1 II 2 1000 78 Sigaba Part 1 II 2 1000 79 Kaskade-S/T - Part 5 II 1 1000 80 Beale Ciphers X 1 var 81 RSA Factoring Challenge: RSA-410 III 0 10101 82 RSA Factoring Challenge: RSA-420 III 0 10101 83 RSA Factoring Challenge: RSA-430 III 0 10101 84 RSA Factoring Challenge: RSA-440 III 0 10101 85 RSA Factoring Challenge: RSA-400 III 0 10101 86 RSA Factoring Challenge: RSA-380 III 0 10101 87 RSA Factoring Challenge: RSA-360 III 0 10101 88 RSA Factoring Challenge: RSA-350 III 0 10101 89 RSA Factoring Challenge: RSA-370 III 0 10101 90 RSA Factoring Challenge: RSA-450 III 0 10101 91 RSA Factoring Challenge: RSA-390 III 0 10101 92 RSA Factoring Challenge: RSA-470 III 0 10101 93 RSA Factoring Challenge: RSA-340 III 0 10101 94 D'Agapeyeff X 0 var 95 RSA Factoring Challenge: RSA-2048 III 0 10101 96 World Record Challenge: Break 65 Bits of AES III 0 10000 97 RSA Factoring Challenge: RSA-490 III 0 10101 98 RSA Factoring Challenge: RSA-480 III 0 10101 99 RSA Factoring Challenge: RSA-1536 III 0 10101 100 RSA Factoring Challenge: RSA-500 III 0 10101 101 RSA Factoring Challenge: RSA-617 III 0 10101 102 RSA Factoring Challenge: RSA-460 III 0 10101 103 RSA Factoring Challenge: RSA-220 II 0 1010 104 Kryptos X 0 var 105 Unknown Author X 0 var 106 The third ENIGMA M4 message X 0 var 107 Double Columnar Transposition X 0 var 108 RSA Factoring Challenge: RSA-210 II 0 1010 109 Dorabella X 0 var 110 Sigaba Part 2 III 0 10000 111 Digital Signatures: DSA with Medium Fields III 0 10000 112 Twelve-Year-Old Murder Case X 0 var 113 Recovering the Private Key in the Fully Homomorphic Encryption Scheme III 0 10000 114 Notes of an Italian Soldier X 0 var 115 Kaskade-S/T - Part 4 II 0 1000 116 Substitution Cipher with Non-Prefix Codes III 0 10000 117 RSA Factoring Challenge: RSA-704 II 0 1010 118 RSA Factoring Challenge: RSA-230 II 0 1010 119 RSA Factoring Challenge: RSA-300 III 0 10101 120 RSA Factoring Challenge: RSA-290 III 0 10101 121 RSA Factoring Challenge: RSA-309 III 0 10101 122 RSA Factoring Challenge: RSA-1024 III 0 10101 123 RSA Factoring Challenge: RSA-320 III 0 10101 124 RSA Factoring Challenge: RSA-310 III 0 10101 125 RSA Factoring Challenge: RSA-280 III 0 10101 126 RSA Factoring Challenge: RSA-896 III 0 10101 127 RSA Factoring Challenge: RSA-240 III 0 10101 128 RSA Factoring Challenge: RSA-232 III 0 10101 129 RSA Factoring Challenge: RSA-250 III 0 10101 130 RSA Factoring Challenge: RSA-260 III 0 10101 131 RSA Factoring Challenge: RSA-270 III 0 10101 132 RSA Factoring Challenge: RSA-330 III 0 10101

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