A collection of cryptographic algorithm implementations in Java, designed for both learning and experimentation. This repository is a practical resource for understanding how fundamental encryption, ...

A unified web-based encryption platform combining Tree-Based Playfair cipher (545×545 matrix) with RSA public-key cryptography for secure end-to-end messaging. - ...

Abstract: Cryptography or message hiding techniques can be a solution to avoid cybercrime. One of the techniques is Playfair Cipher that is a cryptographic algorithm. It can hide messages by forming a ...

The Playfair cipher is an incredibLe code system that is both difficult to decrypt without a computer and easily solvable by hand. You might be familiar with the Cryptoquip in the comics section of a ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher. Its ...

Abstract: In this paper, we have proposed an encryption method which is developed by extending Playfair Cipher to make it more secure. Known as Polyalphabetic cipher, Playfair uses a key matrix ...

The Double Playfair is an extension of the Playfair to use two separate keys and to encipher each pair of letters twice. The German police made the mistake in late 1941 of switching from the rather ...