It's the successor of the Copperhead OS project. Some details at https://liliputing.com/2019/04/grapheneos-is-an-android-based-security-hardened-open-source-ope

It's the successor of the Copperhead OS project. Some details at https://liliputing.com/2019/04/grapheneos-is-an-android-based-security-hardened-open-source-operating-system.html https://liliputing.com/2019/04/grapheneos-is-an-android-base...