From the original part: "MCS Holdings on the basis that MCS would only issue certificates for domains that they had registered"
I don't understand why this would be allowed. Like, doesn't this break the entire concept of a CA if the CA will allow third parties to issue certs? I understand the need for corp MITM but that's best done by pushing out your own CA. And I understand the desire for a company to have its own self-managed CA system that's publicly trusted. But that simply cannot require the CA to put any trust into the other company; there's gotta be technical measures. That's why I'm confused as to why it matters if an HSM was used or not. Can someone enlighten me on what's going on?
I don't understand why this would be allowed. Like, doesn't this break the entire concept of a CA if the CA will allow third parties to issue certs? I understand the need for corp MITM but that's best done by pushing out your own CA. And I understand the desire for a company to have its own self-managed CA system that's publicly trusted. But that simply cannot require the CA to put any trust into the other company; there's gotta be technical measures. That's why I'm confused as to why it matters if an HSM was used or not. Can someone enlighten me on what's going on?