Secure Tamper-Resistant chat Application using Digital Signature Algorithm (DSA)
Sivasangari G
Chat applications are widely used in personal, academic, and professional communication, but many existing systems lack proper security mechanisms to protect message from tampering, fake sender identities, and replay attacks. Messages can be altered during transmission, leading to serious security risks and misinformation. To address these issues, this paper presents a Secure Tamper-Resistant Chat Application developed using Java and Digital Signature Algorithms. In the proposed system, each message is digitally signed by the sender and verified by the receiver to ensure both message integrity and sender authenticity. Any modified or forged message is automatically rejected, ensuring secure and reliable communication through a client-server architecture.