Secure Element

Device security often ends at a very concrete question: where should the key live?

The answer cannot simply be “use a secure element” or “put it in eFuse”. Different keys have different uses, lifetimes, attack surfaces, and costs. They may need different storage locations.

Start by splitting the question:

what is the key used for
-> must it be exportable
-> does it need updates
-> what is the blast radius if it leaks
-> can the attacker physically access the device
-> how is it generated or provisioned
-> how is it rotated, repaired, and retired in the field

Device key storage is not about hiding a string. It defines whether key material can be read, copied, replaced, misused, and recovered throughout the device lifecycle.