🛡️ PeerSend

PeerSend is a full-stack encrypted messaging platform built entirely with Next.js — combining frontend and backend in one unified app. It ensures end-to-end privacy, cryptographic authenticity, and per-user decryption security.

🔐 Every message is encrypted.
✍️ Every message is signed and verified.
🧠 Every user has a mnemonic-based key recovery system.

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Tech Stack

• Framework: Next.js (App Router)
• Styling: Tailwind CSS
• Database: PostgreSQL + Prisma
• Auth: NextAuth.js
• Encryption: RSA (asymmetric), AES (symmetric), Digital Signatures (Node.js crypto module)

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Key Features

• End-to-End Encrypted Messaging
  Messages are encrypted using a fresh AES key for every send.

• Per-Recipient AES Key Encryption
  Each recipient gets their own encrypted copy of the AES key (via their public RSA key).

• Digital Signature Verification
  Only messages verified by the sender’s signature are displayed.

• Zero Trust Rendering
  Unverified messages are hidden until successfully validated.

• Mnemonic-Based Key Recovery
  Each user gets a 12-word recovery phrase to regenerate their RSA key pair.

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⚙️ Getting Started

1. Clone the Repository

git clone https://github.com/your-username/peersend.git
cd peersend

.env file

DATABASE_URL=your_postgresql_database_url
NEXTAUTH_SECRET=your_next_auth_secret

Run the development server

npm run dev