## Bifid Cipher[Back] This page defines a Bifid Cipher [Theory]: 1 2 3 4 5 1 B G W K Z 2 Q P N D S 3 I O A X E 4 F C L U M 5 T H Y V R First we look up the grid, and the arrange the two character value into two rows. For example is we have plaintext of "maryland", then "m" is "4" and "5", so we place "4" in the first row, and "5" in the second row, and continue to do this for all the letters: maryland 43554322 53533334 Next we read along the rows and merge, to give: 43 55 43 22 53 53 33 34 Next we convert them back to letters from the grid: L R L P Y Y A X |