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| =Crypto Puzzles=
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| The following cryptopuzzles follow a common format. See [[Puzzles/Crypto Puzzles]]
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| ==Level 1==
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| Level 1 crypto puzzles: [[Puzzles/Crypto Level 1]]
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| [[Puzzles/Crypto Level 1/Puzzle 1]] - Java encoded with Caesar cipher
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| [[Puzzles/Crypto Level 1/Puzzle 2]] - Caesar cipher cryptograms with spaces
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| [[Puzzles/Crypto Level 1/Puzzle 3]] - Caesar cipher cryptograms with no spaces (frequency or brute force)
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| [[Puzzles/Crypto Level 1/Puzzle 4]] - Blocks of 8 integers, numbers -> letters -> message directly, filled in with DDDs
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| [[Puzzles/Crypto Level 1/Puzzle 5]] - Affine cipher ax+b (modular arithmetic focus, gcd, Euclid's algorithm)
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| [[Puzzles/Crypto Level 1/Puzzle 6]] - Affine cipher ax+b (cipher focus)
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| [[Puzzles/Crypto Level 1/Puzzle 7]] - OTP - modular arithmetic, chunks of data, first line of novels as OTP keys.
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| [[Puzzles/Crypto Level 1/Puzzle 8]] - OTP with generating token
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| [[Puzzles/Crypto Level 1/Puzzle 9]] - Final Challenge Puzzle
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| ==Level 2==
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| Level 2 crypto puzzles: [[Puzzles/Crypto Level 2]]
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| [[Puzzles/Crypto Level 2/Puzzle 1]] - Java encoded with Caesar cipher
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| [[Puzzles/Crypto Level 2/Puzzle 2]] - more Caesar cipher cryptograms, no spaces (frequency or brute force)
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| [[Puzzles/Crypto Level 2/Puzzle 3]] - Caesar encoded with numbers in blocks of 8
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| [[Puzzles/Crypto Level 2/Puzzle 4]] - Affine cipher, gcd, Euclid's algorithm
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| [[Puzzles/Crypto Level 2/Puzzle 5]] - Modular arithmetic, multiplicative inverses, importance of prime modulus and factoring
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| [[Puzzles/Crypto Level 2/Puzzle 6]] - Modular exponentiation, Fermat's Little Theorem, Euler's Theorem, relative prime
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| [[Puzzles/Crypto Level 2/Puzzle 7]] - RSA baby steps
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| [[Puzzles/Crypto Level 2/Puzzle 8]] - RSA bigger numbers
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| [[Puzzles/Crypto Level 2/Puzzle 9]] - Final Challenge Puzzle
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| (Finite fields? mod arithmetic with different base)
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| =References= | | =References= |
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| ==External Links== | | ==External Links== |
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| http://www.math.brown.edu/%7Ejhs/MathCrypto/MCOnlineExercises.html | | Crypto math: http://www.math.brown.edu/%7Ejhs/MathCrypto/MCOnlineExercises.html |
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| | Nice collection of probability puzzles, solved with Python 3: https://github.com/BillCruise/Probability |
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| | handbook of applied cryptography: all chapters provided for free: http://cacr.uwaterloo.ca/hac/ |
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| =Flags= | | =Flags= |
