The Playfair Cipher uses digraphs to encrypt and decrypt from a 5x5 matrix constructed from a sequence key of 25 unique letters. Note that the letter J is not included. Memorization of the keyword and ...

This repository contains a Java implementation of the Playfair cipher algorithm, a classical symmetric encryption technique used for encrypting alphabetic text. The Playfair cipher operates on pairs ...

The Playfair cipher is an incredibLe code system that is both difficult to decrypt without a computer and easily solvable by hand. Here's how to solve it.

This paper will mainly study a kind of substitution ciphers-Playfair cipher and review three improved versions of the 3D Playfair cipher. Then, a conclusion was drawn for these three improved versions ...

Like the Playfair, the Double Playfair cipher uses 5x5 squares. In this case two keywords are chosen, and each square is filled in the same way as the Playfair.

3D-Playfair cipher is multiple letter encryption cipher. In this, trigraphs of plaintext are treated as single units and converted into corresponding cipher text trigraphs. 3D-Playfair Ciphers ...

The mechanics of the Double Playfair are involved enough that it is expected that solving this cipher would be most readily achieved by a computer program that ...