That logic informed ROOST — Robust Open Online Safety Tools, which I launched with Yann LeCun and Eric Schmidt at the Paris AI Action Summit . Take synthetic CSAM : a federation of mid‑size platforms (e.g., Bluesky, Roblox, Discord) can detect locally , convert signals to non‑identifying text (e.g., grooming patterns) to respect privacy and legality, and share those signals — similar to cybersecurity incident exchange — instead of relying solely on a single centralized tool like Microsoft PhotoDNA . In short, security and openness can reinforce each other when the problem is defense‑dominant.