Zero Trust
A security model that treats every request as untrusted until verified, regardless of whether it originates inside or outside the network. The operating principle: never trust, always verify.
Why it matters
Perimeter security assumed everything inside the office network was safe. Cloud apps, remote work, and phone-based workflows dissolved that perimeter, and a single stolen password now walks straight past a castle-and-moat defence. Zero Trust matters because it limits how far an attacker can travel after any single control fails.
How it works
Every access request is evaluated on identity, device, context, and least privilege before it is granted, and the evaluation repeats continuously rather than once at login. In practice that combines strong authentication, per-role permissions, network segmentation, and audit logging, so each resource makes its own trust decision instead of inheriting one from the network.
A real-world example
A multi-branch business runs its expense system in the cloud. Under Zero Trust, a branch accountant signs in with their own identity, sees only their branch's vouchers, and every approval they make is logged with who, where, and when. If their password leaks, the attacker still cannot see other branches, approve beyond the accountant's tier, or erase the trail.
Common mistakes
- ✗ Buying a 'Zero Trust product' and declaring the job done; it is an architecture and a discipline, not a single tool
- ✗ Verifying identity once at login and then trusting the session forever
- ✗ Granting broad roles because fine-grained permissions feel slow to set up
- ✗ Leaving service accounts and integrations outside the model while locking down only human users
Best practices
- ✓ Start from least privilege: every role gets the minimum access its job needs
- ✓ Make audit logging non-optional and immutable, verification without evidence is theatre
- ✓ Apply the model to machines and API keys, not just people
- ✓ Roll out incrementally: protect the highest-value system first, then expand
Frequently asked questions
Is Zero Trust only for large enterprises?
No. Small multi-branch businesses arguably benefit more, because one shared password or over-broad role can expose the whole operation. The principles scale down cleanly: least privilege, per-user identity, and logged actions.
Does Zero Trust slow teams down?
Implemented well, users mostly notice nothing: they sign in and see exactly what their role needs. The friction of occasional re-verification is far cheaper than the downtime of an account-takeover incident.
Where should a business start?
With the system that moves money or holds customer data. Give every user their own identity, scope roles tightly, turn on audit logs, and expand outward from there.
AEGIBIT builds every product on Zero Trust foundations: per-user identity, role-scoped access, and immutable audit logs are defaults, not add-ons.
How AEGIBIT engineers security →