CypherQR

Send and receive end-to-end encrypted messages using QR codes.
No servers. No accounts. No tracking. Your data stays on your device.

CyperQR is a privacy-first messaging tool that uses QR codes and modern cryptography to enable secure communication without servers, accounts, or internet dependency.

- How it works

CyperQR uses public/private key cryptography to encrypt messages locally on your device. The encrypted message is converted into a QR code, which can be shared via any platform (WhatsApp, email, etc.).

The recipient scans the QR code on a secure (offline) device and decrypts it using their private key.

⚙️ Key Features

- End-to-End Encryption
Uses X25519 + AES-256-GCM
Only the recipient can decrypt messages

- QR-Based Messaging
Send encrypted messages as QR codes
Scan QR codes to decrypt messages instantly

- Offline Security
Decryption happens entirely on-device
No internet connection required

- Private Key Protection
Keys stored locally using strong encryption (Argon2id + SQLCipher)
Private keys never leave your device

No Servers, No Tracking
No accounts
No cloud storage
No message logging