Cryptography in a secure chat application

Abstract

In today's digital age, secure communication has become a critical concern as users demand privacy and data integrity across online platforms. This project explores the application of cryptography in designing a secure chat application that ensures confidentiality, authentication, integrity, and availability of communication. By leveraging modern encryption techniques such as end-to-end encryption, asymmetric key exchanges, and secure hashing algorithms, the proposed chat application prevents unauthorized access, eavesdropping, and tampering of messages. The project evaluates existing cryptographic protocols, such as RSA and AES, and implements a hybrid model to achieve optimal security and performance. Additionally, practical challenges such as key management, scalability, and user experience are addressed. The implementation is tested rigorously against simulated threats, demonstrating its effectiveness in providing a secure and user-friendly communication platform. This research contributes to the growing need for secure digital solutions, paving the way for robust applications in personal and enterprise environments.