COCRYPT
One file. Every key matters.
Lock a file with a shared decision. CoCrypt splits its encryption key among your chosen participants and collects their approvals through nearby Bluetooth connections.
Every key piece counts
AES-256-GCM protects the file. Its key is split into N pieces with XOR; all pieces are required to reconstruct it. Each piece is encrypted for its participant using EC P-256 and ECIES.
Nearby, device to device
Exchange public keys and collect approvals over Bluetooth Low Energy. Encryption and approval need no internet connection or cloud relay.
Approve with biometrics
Participants authenticate with face or fingerprint recognition on their own device before sending an approval. CoCrypt receives the authentication result, not biometric templates.
A fresh challenge
Unlock requests use a fresh, time-stamped challenge. The app verifies the participant’s ECDSA signature before accepting the returned key piece.
Your key, your recovery
Create a 12-word recovery phrase during setup. It can restore the same key on another device. Keep it private: anyone with those words can recreate your key.
One portable .cvl file
Documents, images, videos and archives can be encrypted into a .cvl container. Save or share the encrypted file using the system share sheet. Device memory and storage limit file size.