Chat Application with A Codified Information Traveling Option

Barbara Emma Sanchez Rinza, Ruth Itzel Gutierrez Castro, Emmanuel Felix Valenzuela

Cryptology is the science that involves the study of the various techniques to keep information secure. It is the science that deals with the theoretical problems related to the safety in the interchange, between a transmitter and a receptor, of codified information traveling in a communication channel [1]. The project consist of building a software to cipher text messages using a variant on the Playfair cipher method, which is an algorithm used in cryptology. The variant consist on extend the allowed characters from Playfair to include every character on the ASCII code. In this case, a 16x16 matrix will be used, to be able to also include the extended characters. The project was developed in Matlab, a programming and design platform that is able to do matrix manipulation and calculation easily. For the possible implementation, we’re going to use a virtual application developed in Matlab using the TCP/IP protocol to send and receive encrypted messages.