Every security vendor now sells “Zero Trust.” The architecture principle behind the term — never trust, always verify, least privilege by default — is sound. The marketing has made it harder, not easier, for security teams to actually implement it.
What Zero Trust actually requires
Strong identity verification for every request, regardless of network location; micro-segmentation so a compromised workload can’t move laterally; and continuous verification rather than a one-time login granting broad, standing access.
Where implementations go wrong
Teams often implement Zero Trust network access (ZTNA) as a VPN replacement and call it done — but ZTNA alone doesn’t address workload-to-workload trust, which is where most lateral movement in real incidents actually happens.
Micro-segmentation policies that are too coarse (segmenting by VPC/VNet rather than by workload identity) provide a false sense of security while leaving broad lateral movement paths open within each segment.
A realistic implementation sequence
Start with identity: strong MFA and conditional access for human users, then workload identity (SPIFFE/SPIRE or your cloud provider’s managed workload identity) for service-to-service calls, then layer in network micro-segmentation once identity is solid — doing it in the reverse order means rebuilding your segmentation policies once identity-aware access is in place anyway.
Leave a Reply