Beaufort Cipher Tutorials and Guides

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Beaufort Cipher
March 19, 2026
15 min read

Beaufort Cipher Guide: Self-Reciprocal Encryption & How It Differs from Vigenere

A complete guide to the Beaufort cipher covering Sir Francis Beaufort's history, the mathematical formula B(p,k) = (k - p) mod 26, proof of self-reciprocity, worked examples, differences from the Vigenere and Variant Beaufort ciphers, and cryptanalysis techniques.

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