#zero-trust

The Network Was Never the Boundary: What mTLS Actually Buys Service-to-Service Traffic

Every internal service already treats "it's on the same network" as proof enough. mTLS replaces that assumption with a certificate check on every connection — which is exactly why it works, and exactly why a bad rotation can take down more at once than an attacker ever could.

July 28, 2026 · 8 min read