How do IoT devices know the checksum of firmware upgrades

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When IoT devices update their firmware, they often verify the checksum before installation.

  • How do these devices know the correct checksum in advance?
  • Is the checksum stored on the device or fetched from a secure server?
  • How do cryptographic hashes (SHA-256, etc.) ensure the integrity of firmware updates?

I’d like to understand how checksum validation works and how it prevents malicious firmware updates.

3 days ago in Cyber Security & Ethical Hacking by Anupam
• 9,890 points • 11 views

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