Overview
Making hardware-backed DRM the default for premium video on Windows.
This initiative transitions Windows protected video playback from primarily software-based DRM paths to hardware-backed DRM by default, improving the security posture, content-protection robustness, and reliability of premium media playback across the Windows ecosystem. The scope covers industry-standard DRM protocols and premium streaming experiences delivered through browsers and media applications.
Enabling hardware-backed DRM by default strengthens the trusted execution path by leveraging hardware security capabilities instead of relying primarily on software-protected playback. This aligns Windows with studio security requirements, reduces exposure to content-extraction attacks, and provides a stronger foundation for premium scenarios including 4K, HDR, and other high-value content.
The Problem
Rollouts at this scale need real experimentation, not guesswork.
Moving a security-sensitive default across hundreds of millions of devices means every change has to be measurable. Before this work, there was no clean way to isolate treatment devices from control devices, or to attribute reliability changes to a specific rollout flight. Without that, "did this help?" was a question aggregate trends couldn't answer.
What I Built
Metrics, cohorts, and the telemetry to see them.
- Experimentation-compatible reliability metrics. Redesigned the reliability metric layer so every metric can be sliced along treatment / control cohorts without recomputation.
- Flight-ID-based cohort attribution. Shipped the plumbing that ties every telemetry event to the specific rollout flight it came from, enabling proper A/B comparisons.
- Reliability dashboards. Built the Power BI surfaces the team uses day-to-day to watch the rollout, spot regressions early, and hand off findings to content-protection engineering.
- Ecosystem-readiness analysis. Analyzed playback telemetry to identify failure patterns and close instrumentation gaps needed to safely expand adoption — in coordination with browser teams, streaming partners, silicon vendors, and device manufacturers.
Impact
~$1B
Projected reduction in security liability tied to the rollout this experimentation infrastructure supports.
Beyond the headline number, the more durable win is a repeatable experimentation pattern the team can reuse for future Windows Media rollouts — hardware feature or otherwise.
What I Learned
The engineering that mattered most wasn't in any single dashboard — it was in the small decisions all the way down: how to shape metrics, how to identify cohorts consistently across pipelines, how to make the resulting views legible to engineers who aren't data specialists. The skill I'm most trying to keep developing is spotting when one of those small decisions is going to matter a lot later.