CoCrypt

Beyondend Dev

About this app

CoCrypt is a high-security application that ensures your files are locked and can only be decrypted when all trusted participants provide physical confirmation through NFC and biometric authentication.

How It Works
Participant Registration: Each participant generates a key pair on their own device and shares their public key with the file owner exclusively via NFC—no internet or servers required.

Owner-Side Locking: The file owner encrypts any file, and the encryption key is split into fragments corresponding to the number of participants, resulting in a single .ccr (veya tercih ettiğiniz uzantı) file ready for sharing.

Collective Unlocking: To unlock a file, every participant must physically tap their phone to an NFC tag and authenticate via fingerprint or face recognition. The file cannot be decrypted unless everyone provides their consent.

Key Features
N-of-N Multi-Party Approval: The encryption key is distributed among participants. If even a single fragment is missing, decrypting the file becomes mathematically impossible.

NFC Key Exchange: All key sharing is performed through physical proximity (NFC), eliminating the need for internet or cloud servers.

Biometric Authentication: Participants must verify their identity using biometrics to release their specific key fragment.

Challenge-Response Protocol: To prevent replay attacks, a custom time-stamped verification protocol is used for every unlocking session.

Zero-Cloud & Zero-Account: CoCrypt has no backend server, requires no account creation, and stores your private keys directly in your device’s secure hardware.

Compatible with All File Formats: Securely place documents, photos, or videos into a secure container and share them through any channel.

Ideal For:
Enterprises: Require the approval of all board members to access critical corporate files.

Families: Encrypt sensitive documents like inheritance plans so they can only be opened when the whole family is physically together.

Teams: Store shared secrets securely, ensuring no single individual has full authority.

Journalists: Protect sensitive sources by tying access to the authorization of multiple colleagues.

Offline Environments: Use seamlessly in air-gapped or internet-free environments thanks to NFC technology.

What’s new

Unlocking is simpler: once every participant key is collected, scanning stops and the flow continues clearly.

Participant registration and key collection are smoother. Files unlock only when everyone is physically nearby.
.cvl locked files are recognized more reliably on Android. Nearby-device connection and error messages are clearer.