Puzzles

Crypto Puzzles

The following cryptopuzzles follow a common format. See Puzzles/Crypto Puzzles

Level 1

Level 1 crypto puzzles: Puzzles/Crypto Level 1

Puzzles/Crypto Level 1/Puzzle 1: Hello POOKIE (Java encoded with Caesar cipher)

Puzzles/Crypto Level 1/Puzzle 2: Et tu, brute? (Caesar cipher cryptograms with spaces)

Puzzles/Crypto Level 1/Puzzle 3: Et three, brute? (Caesar cipher cryptograms with no spaces (frequency or brute force))

Puzzles/Crypto Level 1/Puzzle 4: Toga Party (Blocks of 8 integers, numbers -> letters -> message directly)

Puzzles/Crypto Level 1/Puzzle 5: Game of Drones (Game theory with pairs of drones)

Puzzles/Crypto Level 1/Puzzle 6: (Affine cipher ax+b (modular arithmetic focus, gcd, Euclid's algorithm))

Puzzles/Crypto Level 1/Puzzle 7 - OTP - modular arithmetic, chunks of data, first line of novels as OTP keys.

Puzzles/Crypto Level 1/Puzzle 8 - OTP with generating token

Puzzles/Crypto Level 1/Puzzle 9 - Final Challenge Puzzle

Level 2

Level 2 crypto puzzles: Puzzles/Crypto Level 2

Puzzles/Crypto Level 2/Puzzle 1 - Java encoded with Caesar cipher

Puzzles/Crypto Level 2/Puzzle 2 - more Caesar cipher cryptograms, no spaces (frequency or brute force)

Puzzles/Crypto Level 2/Puzzle 3 - Caesar encoded with numbers in blocks of 8

Puzzles/Crypto Level 2/Puzzle 4 - Affine cipher, gcd, Euclid's algorithm

Puzzles/Crypto Level 2/Puzzle 5 - Modular arithmetic, multiplicative inverses, importance of prime modulus and factoring

Puzzles/Crypto Level 2/Puzzle 6 - Modular exponentiation, Fermat's Little Theorem, Euler's Theorem, relative prime

Puzzles/Crypto Level 2/Puzzle 7 - RSA baby steps

Puzzles/Crypto Level 2/Puzzle 8 - RSA bigger numbers

Puzzles/Crypto Level 2/Puzzle 9 - Final Challenge Puzzle

(Finite fields? mod arithmetic with different base)

References

Related Wiki Pages

Pangrams

Puzzles/Clues

External Links

Crypto math: http://www.math.brown.edu/%7Ejhs/MathCrypto/MCOnlineExercises.html

Nice collection of probability puzzles, solved with Python 3: https://github.com/BillCruise/Probability