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This Flutter project is a chat application inspired by WhatsApp. The app features a familiar interface with a functional chat page, a Local Auth Screen, and user registration using email/password or Google Account.
This is a simple instant messaging application that uses end-to-end encryption, I used Elliptic Curve Diffie Hellman for key exchange, Its not like whatsapp but it does generate a new keypair for each new chat pair, then I used AES-256 for encryption and HMAC-SHA-256 for message authentication to identify tampering.
This is a native Android app that sends notifications to all users within 3km proximity when a user presses a button on their phone. Clicking on the notification leads the user to an activity with the broadcast message. It uses Firebase Firestore for the database and Firebase Cloud Messaging for sending notifications.