Delta Android Keysystem -

adb shell dumpsys media.drm | grep -A10 "com.widevine" Output example:

What is the Delta Android KeySystem? Is it a new standard? A fork of Widevine? A vulnerability patch? Or something else entirely?

I/WVME : [Delta KeySystem] Security level fallback from L1 to L3 due to tampered trust zone. 1. Streaming App Development (Debugging) If your ExoPlayer implementation suddenly throws MediaDrmException: Unsupported scheme , the device may have switched to a delta KeySystem. Debugging requires checking: