Playfair cipher decrypt online

Playfair Breaker will search for Playfair keywords that take a given plaintext to a given ciphertext. Wildcards are allowed in the plaintext, and it is possible to break a code from ciphertext alone. A surprisingly short amount of ciphertext is required! See the results : the correct keyword, promise , appears as the fourth choice using UKACD , with corresponding plaintext giantdespair.

Enter pb in the plaintext box and au in the ciphertext box to find keywords which include doublespacing and tricephalous that will transmute lead into gold.

It was then used by all warring parties during both world wars. Like other ciphers of this period, with the advent of the computer age, it was withdrawn from use due to the possibility of breaking with the use of brute force attacks, finding the most common digrams in a given language. It consists of a code table with 25 letters of the Latin alphabet. Due to the fact that the Latin alphabet contains 26 letters, the one letter that is least used in the alphabet is removed or the letters are used alternatively eg I instead of J.

We also enter a keyword or keywords into the table. The repeated letters are removed. We fill the rest of the table fields with the remaining letters of the alphabet in alphabetical order.

To encrypt the plaintext, we divide it into digrams consisting of pairs of letters. If the explicit word does not have an even number of letters, then at the end we add the letter X. If there are the same letters in a pair, we separate them also with the letter X.

We added an X between the letters OO to separate a pair of the same letters. Now we read letters from the intersection of lines drawn vertically and horizontally from each open letter.

The first encoded letter pair of CA of the plaintext will be KE. If a pair of letters appear on the same line, then for each open letter we read the letter immediately to its right.

For more detailed description of the Playfair cipher, please visit Crypto-IT webpage. Playfair Cipher The Playfair cipher is a polygraphic substitution cipher.

Enter a secret password. If no password is provided, the table will be sorted alphabetically.