Multi-Tenant GPU Security Isolation

Isolating GPU workloads in multi-tenant environments-network segmentation, memory protection, sideband channels, and compliance-grade boundaries.

The Root Backdoor Every QEMU VM Ships by Default

Most of the virtual machines running in the world at this moment booted with a root-level backdoor already wired in. I will defend the word. Nobody can count live VMs exactly, but the order of magnitude is not in question: tens of millions on QEMU and KVM alone, and that is the conservative read, because KVM sits under most of the public cloud. On a large share of them, an account on the host can run commands as root inside the running guest. No guest password. No SSH session. No packet on the guest network. It is not planted by an attacker and it is not a bug. It is the guest agent the platform ships, running as root on the far end of a channel the host controls, with the one setting that turns it into a remote root shell left on at install and never questioned since. Documented, default, working as intended. The distance between what that feature is documented to do and what anyone actually defends against is the ground we build on. ...

Security Assurance - URE Case - 4/5 - Enabler

4/5 — Security as an Enabler (and “forward agency”) Series: Security Assurance — URE Case — 4/5 Start from the beginning: 1/5 — The Inception Next: 5/5 — Conclusion — Assurance Without Theater Security enables the business when it shows up with agency: not just identifying risk, but carrying enough context to propose solutions that preserve the mission. That requires a maturity shift. When security arrives late, it often speaks in “non-English.” It blocks because the system is already committed to choices no one can defend. ...