A Literature Survey on Secure Messaging App.

With privacy becoming more important today, this paper presents ”ZeroTrace,” a messaging app built to keep your chats safe and temporary. The app starts with a login screen where you can choose between using a phone number or Google to sign in. For the phone option, you enter your number, get a code from Firebase, and type it in to prove it’s you, then set up your profile. With Google, you pick your account and go straight to profile setup, where you add your name, photo, and a short bio, saved in Firestore. The main screen shows your chats and a button to pick contacts, letting you start secure talks in a chat window. You can send texts, files, pictures, videos, or voice notes—all locked with AES-256-GCM encryption, stored in Firestore and Firebase Storage, and unlocked only by the receiver. Your device keeps a copy for later. Once the receiver sees a message or file, it gets a 12-hour timer before it’s deleted by a Firebase tool that checks every hour, keeping things private. You can also manage your profile, delete your account, or log out from a settings page, and if you log in again, Firebase remembers you. By mixing strong encryption and smart storage, ZeroTrace offers a safe, easy way to message, better than most apps, fitting today’s security needs..