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If you really think PSB doesn't provide any security benefit or "improves security in a meaningful way" you should do more security research.
by YXNjaGVyZWdlbgo 5y ago
If you really think PSB doesn't provide any security benefit or "improves security in a meaningful way" you should do more security research.
- monocasa 5y agoI was pretty sure that I made it clear that the concept under discussion was using a hardware root of trust scheme like PSB to tie a specific CPU to a particular vendor's boards. As an aside I'm putting a lot of effort into staying civil; I'd appreciate seeing that effort be a bit more reciprocal.
- YXNjaGVyZWdlbgo 5y agoPSB is there to protect you from a compromised motherboard it protects you from malware in your UEFI firmware. It's not even a vendor lock in it's signing key lock in that is used in that manner by AWS, Gcloud and Azure. Compromised UEFI Firmware is a constant point of failure in pentesting of the secure chain of trust. That you as a security researcher are dismissing the fact is honestly just unbelievable.
- monocasa 5y ago> It's not even a vendor lock in it's signing key lock in that is used in that manner by AWS, Gcloud and Azure. Which is not the mechanism under discussion.
- YXNjaGVyZWdlbgo 5y agoNo, my comment talked about that some believe PSB is only there to destroy the second hand market and I wrote that it is a false statement and PSB actually provides a higher security for servers and you persisted it's not.
- monocasa 5y agoYou started off saying > The feature was implemented in 2017 the only vendors that are using it are lenovo and dell. With lenovo being the only one using it on lower tier cpus than epyc. All of the ODMs use PSB in some way (the PSP won't start without it); it's only Lenovo and Dell that use PSB to tie CPUs to certain boards.