Find adventure
My adventures Online Events Kits Boxes Challenges Shows Services Pages
Privacy Policy Terms of Use Sponsors About Contacts FAQ Pages Services Shows Boxes Kits Online Events My adventures

What is Bacon's cipher?

Bacon's cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. To encode a message, each letter of the plaintext is replaced by a group of five of the letters A or B. Those letters could also be some sort of differences in font. So that there could be two different fonts and one font represents A and other represents B.


There are two versions of Bacon cipher. One has 24 unique letters (I and J, U and V are combined) and the other has 26 (all letters are separated).


Here is the conversion table (24):



Here is the conversion table (26):



We can use Bacon's cipher in two ways.


First is just straight convert A and B segments to latin alphabet like this (26 letters version):




Second way is where the code really shines. We can use two different objects which one will be treated as A and the other as B. In this example, we will use different fonts. A will be regular letters and B will be bolded letters. Spaces with punctuation will be ignored.


We can use some help down here, J!


This transforms to AABBBAABAAABABBABABBABBBA which transforms to blocks by 5: AABBB AABAA ABABB ABABB ABBBA. So we get the same HELLO.


We also can use big and small letters and so on, like here:


we CAN usE somE hELp DoWN hERE, j!