Graphene is a GrapheneOS messaging application that originated as a fork of the renowned Signal app, aiming to provide a more secure, privacy-respecting, and fully open-source alternative. The project stands out for reintroducing security features that Signal had abandoned, such as the ability to encrypt the local database with a passphrase, thereby ensuring added protection for data stored on the device.

It is important to emphasize that this project has its roots in Criptogram, the celebrated