CrypTalk: A Secure Multi-Modal Communication Framework Using Kyber and AES

Abstract

This project introduces CrypTalk, a secure and user-friendly communication platform designed to make online conversations safer and more organized. CrypTalk allows users to send encrypted messages, join video calls, share files, and collaborate in real time through two types of communication rooms: public rooms, which anyone can join, and private rooms, which require admin approval or invitation. This structure ensures open discussions when needed, while sensitive or confidential conversations remain protected.

To guarantee strong security, CrypTalk uses a hybrid encryption model that combines Kyber, a post-quantum encryption algorithm built to resist future quantum-based attacks, with AES, a widely trusted standard for securing fast, real-time communication. In this system, Kyber is used to safely exchange encryption keys, while AES handles the actual message and media encryption. This layered approach keeps user data protected from both current and future security threats. The platform also includes practical features such as voice messaging, emoji reactions, typing indicators, and admin moderation tools like accepting or rejecting join requests and removing participants during chats or video sessions. These features help maintain safety while keeping communication smooth and engaging. Overall, CrypTalk combines modern cryptographic techniques with everyday communication features to provide a secure, efficient, and easy-to-use platform suitable for academic, professional, and privacy-focused users.

KEYWORDS: CrypTalk, Hybrid Encryption, Kyber Algorithm, AES Encryption, Secure Communication, Real Time Collaboration