Baconian Cipher Encoder/Decoder (BAC)

Encode or decode text with the Baconian cipher using A/B patterns.

Choose the same variant your source used.

Optional: hide A/B in a cover text

Paste a cover text. We will replace characters with uppercase (=A) and lowercase (=B) according to your encoded sequence. Extra cover characters will stay the same.

How the Baconian cipher works

The cipher turns every letter into a block of 5 characters, each either “A” or “B”. For example, in the original 24-letter alphabet:

A = AAAAA
B = AAAAB
C = AAABA
...
I/J = ABAAA
U/V = BAABB

Once you have the A/B sequence, you can hide it in many ways: two fonts, two typefaces, two colors, or simply upper/lowercase. A recipient who knows the scheme can map it back to As and Bs and then to letters.

24 vs 26 letters

  • 24-letter (classic): I=J and U=V are merged to fit 24 patterns.
  • 26-letter (extended): every letter A–Z is unique. Pick this if you don’t want merged letters.

Common decoding problems

  • Make sure the symbol you use for A and B is the same throughout.
  • If the encoded message length is not a multiple of 5, the last letter may be incomplete.
  • If the original text used the 24-letter alphabet, decoding with 26-letter mode will produce odd results.
Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\\]
','\
Formula (extracted text)
A = AAAAA B = AAAAB C = AAABA ... I/J = ABAAA U/V = BAABB
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
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