CipherLink

CipherLink lets you encrypt messages and share them as QR codes — with no need for internet, accounts, or servers.

Built for privacy and offline communication, CipherLink uses 2048-bit RSA public-key encryption to keep your messages secure. Just generate, scan, and decode. It’s that simple.

Key Features

🔒 End-to-end RSA encryption
Encrypt messages using the recipient’s public key — only they can decrypt it.

📷 QR code generation & flexible scanning
Turn encrypted messages into QR codes that can be shown, shared, or printed.
Decrypt QR codes either with the camera or by sharing an image directly to CipherLink — no second device required.

📴 Works fully offline
No internet connection is ever required — ideal for air-gapped or low-trust environments.

🧩 Secure local storage
Keys are stored locally using Android Keystore.

🚫 No servers, no accounts, no tracking
All encryption and decryption happens locally on your device.

🧭 How It Works

Add a contact and register their RSA public key (can be scanned or shared via QR).

1. Write your message and select a recipient.
2. CipherLink encrypts the message and displays it as a QR code.
3. Share the QR visually or as an image — entirely offline.
4. The recipient scans the QR or shares the image to CipherLink to decrypt it.

Messages are never uploaded or sent through the app — you control how and when they’re shared.

🧑‍💻 Ideal for:

· Privacy-focused users
· Journalists, activists, or researchers in sensitive environments
· People communicating across air-gapped or untrusted networks
· Developers and tech users interested in public-key encryption

🛡️ Your Privacy, Your Control

CipherLink does not collect or share any user data.
No ads, no analytics, no cloud sync — and no hidden data access.

When decrypting from an image, the app only processes the image explicitly shared to it. CipherLink does not scan or access your gallery, files, or personal data.

Your keys stay on your device. Your messages stay private.
Just you, your contacts, and secure encrypted communication — fully offline, fully under your control.