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ISO/SAE 21434, rollback protection, and the threat models that keep a bootloader honest.
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ISO 21434 for Engineers Who Just Want to Ship Code
A translation guide, not a summary of the standard. Here's what each term actually means for your Tuesday.

Flash Bootloader Rollback Protection: Defending Against Downgrade Attacks
Think like the attacker for a minute. Then build the bootloader that makes their plan pointless.