![]() ![]() With Atbash, the Affine formula is a = b = ( m − 1), where m is the length of the alphabet. Text that has been encrypted with Atbash is most easily identified using frequency analysis. ![]() The most commonly used letters in English are E, T and A. When these have been encrypted using Atbash, they become V, G and Z. If you find a cipher text with a lot of Vs, there’s a good chance you are looking at Atbash. All you need to do is create a translation table with the letters of the alphabet written from A to Z across the top and reversed along the bottom. Find the letter in your cipher text on the bottom row and look above it to see it decrypted. While a lot of people look at ancient Egypt for the origins of codes (and that is where the first evidence of encryption was found) Atbash was actually the first cipher. It has its origins in Israel and was originally used to encrypt and decrypt the Hebrew alphabet. That’s where the name comes from, it’s a shortened version of Aleph Taw Bet Shin, The first, last, second, and second-from-last letters in the Hebrew alphabet.īecause of its simplicity, Atbash hasn’t been used for serious encryption purposes but it has been used to disguise words from casual readers. One example of this is in the bible where place names have been encrypted using Atbash in some chapters of Jeremiah. For example, Jeremiah 25:26 reads, ‘The King of Sheshach shall drink after them.’ Decrypting Seshach using Atbash gives you the more recognisable word, ‘Babylon’.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |