Development of an Instant Messaging Application Based on MLS using QRNG-Generated Keys

Abstract

[Abstract] Nowadays, instant messaging applications have become the main channel of communication between people. In response to demands of privacy by users, some applications have begun to incorporate end-to-end encryption to protect conversations. The Messaging Layer Security (MLS) is a recent protocol that offers end-to-end encryption designed for groups, providing both efficiency and security. In this work we develop a messaging application that uses MLS as the basis for secure communications between users. The application will use a peer-to-peer network to prevent messages from passing through servers that could store them and try to decrypt them. Furthermore, the cryptographic keys used will be generated by a Quantum Random Number Generator and accessed through an Entropy-as-a-Service platform.