Build an Encrypted Chat Application

Privacy in communication has become a necessity in a world filled with surveillance and cyberattacks. Encrypted messaging ensures that only the sender and receiver can read the conversation, making it a valuable cybersecurity project that promotes secure digital communication.

This app enables secure one-to-one and group messaging using cryptographic techniques like AES or RSA. Messages are encrypted before transmission and decrypted only by the intended recipient. The app also supports user authentication and optional self-destructing messages.

When two users connect, the app generates or exchanges cryptographic keys to establish a secure channel. Messages are encrypted before leaving the sender’s device and decrypted only by the recipient. Even the server handling the transmission cannot read the messages.

• User logs in with credentials and initializes encryption keys.
• Chats are established with secure handshake or key exchange.
• Messages are encrypted using public/private key pairs or shared symmetric keys.
• Messages are transmitted via a WebSocket channel or REST API.
• Recipient decrypts the message and displays it securely.

• Web Crypto API Guide
• CryptoJS JavaScript Library
• Socket.io Documentation
• PyCryptodome for Python Encryption
• OWASP Secure Messaging Guidelines