Meta Open-Sources Stateless NTS: Authenticated Time Without Server-Side Cookie State
Data Engineering

Meta Open-Sources Stateless NTS: Authenticated Time Without Server-Side Cookie State

Meta has open-sourced its Network Time Security implementation and launched nts.meta.com. Here is how its stateless cookie design derives sealing keys from a master secret and the epoch day, how to try it with chrony, and what NTS still cannot fix.

Oct 12, 2026 · 12 min read