CoCrypt
Multi Bio Proximity Encryption
Free
True collective encryption: your file, unlocked only when everyone is present.
CoCrypt protects your files with collective encryption — a file can only be unlocked when every trusted participant is physically present and confirms in person. No exceptions.
How It Works
1. Key Registration: Each participant generates a unique cryptographic key pair on their own device. Public keys are exchanged wirelessly through physical proximity — nothing leaves the room.
2. Locking: The owner encrypts any file. The encryption key is mathematically split into fragments, one per participant, and sealed into a single .cvl file.
3. Collective Unlocking: Every participant must physically bring their device close to unlock. A single missing presence makes decryption mathematically impossible — forever.
Key Features
- N-of-N Collective Approval: Ownership is truly shared. Not one person, not a majority — everyone must be present.
- Presence-Based Key Exchange: Keys are exchanged through physical proximity only. No internet, no cloud, no remote access.
- Challenge-Response Protocol: Every session uses a unique time-stamped ECDSA challenge, making replay attacks impossible.
- Zero-Cloud & Zero-Account: No servers. No accounts. No telemetry. Private keys never leave the device's secure hardware.
- Universal File Support: Documents, photos, videos, archives — any file format can be locked.
Ideal For
- Enterprises: Require all board members to be physically present before accessing critical files.
- Families: Protect inheritance documents, accessible only when the whole family is together.
- Teams: Store shared secrets where no single individual holds complete authority.
- Journalists: Tie source access to the physical authorization of multiple colleagues.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Erhan Olgunelma, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Erhan Olgunelma
- Size
- 24.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Copyright
- © 2026 Beyondend Dev