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As I understand, the SIM is designed by special trusted companies, with special security requirements. It's easier to meet those requirements when the SIM is a
by audunw 4y ago
As I understand, the SIM is designed by special trusted companies, with special security requirements. It's easier to meet those requirements when the SIM is a separate chip that the company making them have full control over.
When you integrate it in the SoC, some of those requirements (tamper protection) will apply to the whole SoC, and you have to integrate the SIM module on the SoC without the company designing it, or the company manufacturing it, having the ability to compromise its security.
I'm guessing it has just taken time hash out the procedure for integrating the iSIM.
- azernik 4y agoYou don't need the tamper protections to apply to the whole SoC, you just need the trusted element (TPM, SE, whatever you call it) to be physically isolated from the rest of the system and include tamper protections.