OpenKeychain is a mobile OpenPGP key manager and identity provider used for storing, importing, and organizing encryption keys and digital certificates. It serves as an end-to-end encryption client and digital signature tool for encrypting and decrypting text and files.
The application functions as a central vault that provides encryption and decryption services to third-party apps, such as email clients and password managers. It enables secure public key exchange through online directory retrieval and QR code scanning.
The project covers cryptographic identity verification, including the ability to sign messages to verify sender identity and manage a local store of private and public keys.