What is "firmware rollback protection" and why is it important for IoT device security?
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Incorrect.
The correct answer is A) It prevents an attacker from "downgrading" a device to an older, vulnerable firmware version (which might have known security flaws) even if they can write to flash, often enforced via version counters checked during boot
Correct Answer
It prevents an attacker from "downgrading" a device to an older, vulnerable firmware version (which might have known security flaws) even if they can write to flash, often enforced via version counters checked during boot
Even with secure boot verifying signatures, an attacker might try to install an older, legitimately-signed but vulnerable firmware version; rollback protection (e.g., monotonic version counters in secure storage) prevents booting firmware older than a minimum allowed version.