Android boot verification to ensure integrity of OS and parti…
summary
Explains how Android ensures OS and partition integrity from a hardware root of trust through bootloader checks to app runtime attestation, showing concrete mechanisms: locked vs unlocked device states, AB slot swapping with Update Engine, boot flags like ebootable and successful, and protection against downgrade using a stored roll back index. Describes large-partition verification using tree hashing, the signed VBMeta structs that store hashes and metadata, and hardware-backed attestation to report verified or failed boot states.
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chapters (9)
- 0:00Android boot verification
- 3:13Boot verification significance
- 9:36Root of trust and device states
- 13:51Verifying partitions and hashing
- 17:47Verification sequence and errors
- 20:54AB updates and OTA process
- 23:45Rollback protection in updates
- 24:50Verified Boot 2.0 and VBmeta
- 27:42Conclusion
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