Design of Lightweight Decentralized Secure Communication

This research focuses on developing a Peer-to-Peer Encrypted Chat Application, offering secure, decentralized communication without reliance on centralized servers. Utilizing SSL/TLS (Secure Socket Layers and Transport Layer Security) encryption ensures the confidentiality and integrity of user data. Built with the Qt framework, the application provides a user-friendly interface for establishing encrypted connections, exchanging messages, and managing communication sessions. Another important aspect of the project is the Certificate-based authentication system which further enhancements of security by validating peers. The SSL/TLS encryption mechanism helps to prevent unauthorized access by ensuring that the messages exchanged between peers are encrypted and that only the intended recipients can read the communication. It also protects against Eavesdropping as in a P2P network, the data travels through various intermediate nodes. The TLS encryption ensures that even if an attacker intercepts the data somehow, the captured data cannot be deciphered. Another advantage of this level of security is that data integrity is maintained throughout the system, The communication network remains reliable, and the system remains tamper-proof. This project also demonstrates the ability of peers to connect and communicate without relying on centralized servers and ensures scalability as more users join. A special emphasis is given to its decentralized aspect ensuring benefits such as fault tolerance, the ability to handle high volumes of traffic, and high resilience. We have also ensured intuitive user interface design created with the help of the Qt framework ensuring seamless interactions for even the users that might not have any technical expertise.