🔐 Encrypted Notes

Encrypted Notes is a secure full-stack web application designed for creating, storing, and managing personal notes with strong encryption. Notes are encrypted server-side using AES-256-GCM before being stored, ensuring privacy even if the database is compromised.

🌐 Frontend

• Modern UI — Clean, responsive interface built with React and Tailwind CSS
• Authentication — Email & password login and registration via Firebase Auth
• Create Notes — Add new encrypted notes with title and content
• Edit Notes — View and update notes using modal dialogs
• Delete Notes — Safely remove notes with confirmation
• Search Notes — Instantly filter notes by title or content

🛡️ Backend

• Secure API — REST API built with Go
• AES-256-GCM Encryption — Notes encrypted before storage
• Decryption on Read — Notes decrypted only for authenticated users
• Firebase Admin SDK — Secure access to Firestore
• Access Control — Each user can only access their own notes

🛠️ Technologies Used

• Frontend: React, Vite, TypeScript, Tailwind CSS
• Backend: Go
• Authentication: Firebase Authentication
• Database: Firestore
• Encryption: AES-256-GCM

🔐 Security Model

• Notes are never stored in plaintext
• Encryption keys are managed via environment variables
• Frontend never has access to encryption keys

💻 Local Development

1. Clone the repository:

git clone https://github.com/Danindu05/encrypted-notes.git
cd encrypted-notes

2. Backend setup

cd backend
go mod tidy
export ENCRYPTION_KEY=Enter Your Encryption Key
export FIREBASE_SERVICE_ACCOUNT=/path/to/FireBaseKey.json
go run .

Backend: http://localhost:8080

3. Frontend setup

cd frontend
pnpm install
echo "VITE_API_URL=http://localhost:8080" > .env
pnpm dev

Frontend: http://localhost:5173