MOBILE FORENSICS

Android Verified Boot (AVB)

Android Verified Boot (AVB) protects modern Android devices from tampered operating system components. The device checks the integrity of key partitions as early as the boot process. This security concept is of great importance to IT forensics, as it has a direct impact on data recovery and analysis capabilities.

Android Verified Boot (AVB 2.0)
Chain of Trust
Bootloader
vbmeta partition
dm-verity
Verified system partitions
OEM keys and signatures
Rollback protection

TECHNICAL BACKGROUND

Technical Fundamentals

AVB forms a chain of trust that extends from the bootloader to the system partitions. Digital signatures ensure that only authorised software is launched.

Key components include, amongst others:

  • •Android Verified Boot (AVB 2.0)
  • •Chain of Trust
  • •Bootloader
  • •vbmeta partition
  • •dm-verity
  • •Verified system partitions
  • •OEM keys and signatures
  • •Rollback protection

The mechanisms used depend on the manufacturer and the version of Android.

OUR APPROACH

This is how your examination will be carried out

A transparent process – from the initial enquiry to the handover of the report.

1
Before each investigation, the device’s security architecture is assessed. This assessment takes into account the bootloader status, AVB configuration and other protective mechanisms. The analysis is carried out using recognised IT forensic tools as well as manual checks. All stages of the investigation are documented in a reproducible manner.
2
LanCologne produces expert reports for private individuals, as well as for companies and solicitors. Our reports have already been used in court proceedings. In some cases, we have been directly commissioned to produce IT forensic reports. Upon request, we can provide anonymised or redacted sample reports or extracts.

TYPICAL QUESTIONS

When is this analysis required?

  • ✔Is Android Verified Boot enabled?
  • ✔Has the operating system been modified?
  • ✔Is the bootloader locked or unlocked?
  • ✔What are the implications for data backup?
  • ✔What conclusions can be drawn from a forensic analysis?

LIMITATIONS & CONCLUSION

What you should know

AVB protects the integrity of the system and may restrict certain forensic procedures. Depending on the device model and security configuration, not all extraction methods are technically feasible. These restrictions are documented transparently.

Android Verified Boot is a key component of the security architecture of modern Android devices. In IT forensics, understanding the chain of trust is crucial to being able to interpret investigation findings correctly.

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Would you like to have the security architecture or integrity of an Android device professionally examined? LanCologne can assist you with an objective IT forensic analysis and comprehensive expert documentation.

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FREQUENTLY ASKED QUESTIONS

Frequently Asked Questions

Click on a question to see the answer.

What is Android Verified Boot?

A security mechanism for verifying the integrity of the Android system during the boot process.

What does ‘chain of trust’ mean?

Each boot component cryptographically verifies the next component in the boot chain.

What is dm-verity’s role?

It detects tampering with protected partitions whilst the system is running.

Does AVB influence forensic science?

Yes. Security mechanisms can restrict access to certain data or extraction methods.

Could an expert report be drawn up on this matter?

Yes. The technical findings are documented and assessed in a way that is easy to follow.