To understand the digest, one must first understand "VBMeta." Short for , VBMeta is the cornerstone of Android’s Verified Boot process (AVB).
: High-security applications and Google's SafetyNet (or Play Integrity) check this digest to ensure the device has not been tampered with. Technical Details ro.boot.vbmeta.digest
: Userspace applications can use this digest to verify that the loaded OS images match the version intended by the manufacturer. Binary Transparency : On newer Pixel devices, this digest is part of Pixel Binary Transparency To understand the digest, one must first understand "VBMeta
During the boot sequence, the bootloader verifies the vbmeta image. Once verification passes, the bootloader extracts the hash of the VBMeta structure itself (or the hash of the entire verified chain) and passes it to the kernel via the Android bootloader control block. The kernel then exposes this as the read-only system property: Binary Transparency : On newer Pixel devices, this