Bifid is a cipher which combines the Polybius square with transposition, and uses fractionation to achieve diffusion. Keys for the Bifid cipher consist of a 25 letter 'key square'. Note that there is no 'j' in the key-square, it is merged with the letter 'i'.
The following buttons can be used to manipulate the text into various forms such as uppercase, lowercase, reverse text, etc. The choice text chosen will be copied and a new page will be opened.