Delta: Android Keysystem [best]

Launch the Delta app on your Android device.

You will be directed to a site (often Linkvertise or similar). Follow the instructions, which usually involve watching a short video, reading an article, or waiting for a timer. delta android keysystem

Output example:

The term "Delta" in mathematics signifies change or difference. Applied to an Android KeySystem, Delta implies a modular architecture where the key management logic is partially updatable without replacing the entire TEE firmware. The Delta Android KeySystem would consist of three layers: Launch the Delta app on your Android device