~upd~ — Ro.boot.vbmeta.digest

getprop ro.boot.vbmeta.digest

, the bootloader reads the vbmeta partition, which contains: ro.boot.vbmeta.digest

This is where our keyword enters the stage. getprop ro

If you’ve ever delved into Android terminal commands, checked your device’s properties via ADB, or dabbled in custom ROM development, you might have encountered a specific system property: ro.boot.vbmeta.digest . the bootloader reads the vbmeta partition

image, which itself contains the verification data (like public keys and hash tree descriptors) for other partitions like Boot Integrity Verification