Build a Secure End-to-End Encrypted Messaging Platform

Traditional messaging systems are vulnerable to surveillance, hacking, and data leaks. Users today demand absolute privacy and security when communicating online. End-to-end encryption ensures that only the sender and receiver can read the conversation, with no third-party (even the platform) able to decrypt the data.

By using cryptographic techniques like asymmetric encryption (RSA, ECC) for key exchange and symmetric encryption (AES) for message transmission, a secure real-time chat platform can be created. Messages are encrypted on the sender’s device and decrypted only on the receiver’s device, ensuring complete privacy.

When users initiate chats, their devices generate private-public key pairs. Messages are encrypted with the recipient’s public key and can only be decrypted using the recipient’s private key. Real-time messaging is handled using WebSockets while ensuring encryption at rest and in transit. Media files are encrypted before upload and decrypted only by the intended user.

• Users register securely and generate cryptographic key pairs.
• Messages are encrypted using asymmetric and symmetric encryption before sending.
• WebSocket connections enable real-time delivery of encrypted message packets.
• Clients decrypt messages locally using private keys without server intervention.
• Optional features include self-destruct timers, secure group chats, and device-level security checks.

• How End-to-End Encryption Works (Explained)
• CryptoJS Library for Encryption in JavaScript
• Secure Messaging App Architecture Best Practices