🔒 DailyVault

DailyVault is a privacy-focused web application that lets you write your daily diary and manage to-dos — fully protected with end-to-end encryption (E2EE).
Only you can read what you write. Even the server cannot decrypt your data.

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✨ Features

• 🧠 Write and store diary entries securely
• ✅ Manage personal to-do lists
• 🔐 End-to-End Encryption (AES-GCM in browser)
• ☁️ Data stored securely in MySQL via Node.js backend
• 💬 Decryption happens only on your device
• 🚫 Zero-knowledge backend — your data stays private

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🏗️ Tech Stack

Frontend: React, JavaScript, Web Crypto API
Backend: Node.js, Express.js
Database: MySQL
Encryption: AES-GCM, PBKDF2 (password-based key derivation)

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🔧 How It Works

1. User writes a diary entry or to-do item.
2. React encrypts the text locally using AES-GCM before sending.
3. Encrypted data (ciphertext + IV + salt) is stored in MySQL.
4. When fetched, data is decrypted locally again using the same password.

💡 The server never sees or stores your encryption key or plaintext — total end-to-end privacy.

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🚀 Setup

git clone https://github.com/jadhav045/DailyVault.git
cd DailyVault

# Backend
cd server
npm install
# create .env with PORT, MONGODB_URI, GROQ_API_KEY
npm run dev

# Frontend (new terminal)
cd ../client
npm install
npm start