Application of selected cryptographic algorithms in an end-to-end messenger application

Abstract

This article presents the project and implementation of a simple text messenger with hybrid end-to-end encryption running on Windows and Android platforms using a Firebase server. Popular messengers are often unsafe due to the lack of default end-to-end encryption. The project covers key generation, message encryption and decryption, and cross-platform multi-user communication. The project demonstrates that it is possible to independently create a solution offering a high level of text conversation security, comparable to the best market applications.