Stochastic, slippery hill climber with backtracking for Vigenere, Beaufort, Quagmire I, II, III, and IV ciphers.

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CrypTool Transcriber & Solver -- a tool for transcribing and cryptanalyzing historical ciphertexts

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Machine learning system for identifying unknown cipher/hash algorithms based on bit variations among plaintext-keyword-ciphertext (chosen-plaintext attack).

PHP code made for fun to try to decode the Oak Island 90 feet inscribed stone

Solutions to Stand Up Maths 5x5 Unique 25 letter problem