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A comment on EME, CDM, AES, CENC, and Keys – Building Blocks of DRM. Parent comment

Re:EME, CDM, AES, CENC, and Keys – Building Blocks of DRM by vengefulduck on Tuesday November 03, 2020 @11:28AM (#24981088)
Intel SGX?
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Re:EME, CDM, AES, CENC, and Keys – Building Blocks of DRM by grishka on Tuesday November 03, 2020 @01:10PM (#24982237)
I've seen this name but still don't understand where's its root of trust. In other words:

- How does the program making use of it make sure it's not been patched so the code that's supposed to run in the enclave runs without one?

- How does it know it's not being run on an emulated CPU or in a VM? And that those checks haven't been patched out, too?

- How does it make sure the OS is cooperating? I assume there is some cooperation required from the kernel at least.

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