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Cryptanalysis is the art and science of defeating encryption without knowing the secret key. Unlike cryptography, which designs ciphers, cryptanalysis exposes their weaknesses through statistical techniques, known-plaintext attacks, and mathematical insight. This tool lets you intercept a ciphertext, run letter-frequency analysis against natural language statistics, and iteratively decode the message—exactly how historical codebreakers approached enemy communications.
cryptanalysis · frequency analysis · substitution cipher · Caesar cipher · Vigenère cipher · index of coincidence
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