CryptNShare

End-to-end encrypted file sharing with post-quantum security. Upload, encrypt, and share files with passwords, expiry dates, and download limits.

CryptNShare is a secure file-sharing app built for a post-quantum world.

Every file you upload is encrypted at rest using a hybrid scheme that combines post-quantum cryptography (ML-KEM-768) with AES-256-GCM — protecting your data against both today's threats and future quantum attacks.

KEY FEATURES

• Post-Quantum Encryption — Files are protected with ML-KEM-768, a NIST-standardized post-quantum algorithm, layered with AES-256-GCM.

• Secure Share Links — Generate shareable links for any file with full control over who can access them.

• Access Controls — Protect shares with passwords, restrict access to specific email addresses, set expiry dates, and limit the number of downloads.

• Encrypted at Rest — Your files are never stored in plain text. Encryption and decryption happen with streaming chunks for performance and security.

• Simple, Fast Sharing — Upload from your photo library or files, get a link, and share in seconds.

• Sign In Your Way — Use email, your Google account, or Sign in with Apple.

WHO IT'S FOR

CryptNShare is for anyone who needs to share sensitive documents, photos, or files without compromising privacy — professionals, teams, and individuals who take security seriously.

Whether you're sending a contract, a personal document, or confidential work files, CryptNShare keeps your data protected from the moment it leaves your device.

Download CryptNShare and share with confidence.