Unverified50% confidenceFactExact time
The Vigenère cipher is a polyalphabetic substitution scheme proposed in the 16th century, which uses a keyword to determine the shift amount for each plaintext letter.
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50%
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Long-term
Relevance
10/14/2026
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Related Claims
UnverifiedWhat the protagonist Legrand deciphers in 'The Gold-Bug' is a substitution cipher.70% similarUnverifiedClassical ciphers are broadly divided into two categories: substitution ciphers and transposition ciphers, with substitution ciphers further divided into monoalphabetic substitution (such as the Caesar cipher) and polyalphabetic substitution.68% similarUnverified17th-century alchemists recorded experiments using coded language, symbols, and encrypted text, and their communications were filled with ciphers and obscure terminology.64% similarUnverifiedRuneScape employed byte-for-byte 1-to-1 substitution encryption, making the encrypted data size exactly equal to the pre-encryption size with no bloat.62% similarUnverifiedWWI-era German military ciphers typically employed substitution ciphers, transposition ciphers, and codebook-based encoding systems.61% similar
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