When employees work from home, cafes and personal phones, the line between "inside and outside the company" loses meaning. Zero Trust — "never trust by default, always verify" — is the security model replacing traditional firewall-based defense.
What is Zero Trust?
Zero Trust is a security philosophy built on one principle: never automatically trust any user or device, whether inside or outside the company network. Every access request must verify identity, check the device and grant the minimum privileges needed.
Why isn't the old model enough?
The old "castle-and-moat" model assumed everything inside the company network was safe. But when data lives in the cloud and staff connect from everywhere, one compromised account lets an attacker inside to move freely. Zero Trust fixes this by verifying every access request.
The 5 pillars of Zero Trust
| Pillar | Meaning |
|---|---|
| Identity | Strong authentication (MFA) for every user |
| Device | Only compliant devices may access |
| Least privilege | Each person has exactly the access their job needs |
| Segmentation | Split systems to limit damage if breached |
| Monitoring | Continuously watch & alert on unusual behavior |
Starting Zero Trust for an SME
SMEs don't need a huge project to begin. The first three steps are simple with high impact:
- Enable MFA org-wide — the single most important step, blocking most account-takeover attacks.
- Role-based permissions — remove excess admin rights, apply least privilege.
- Use a platform with built-in Zero Trust tools — Google Workspace and Microsoft 365 include authentication, device control and access logs.
Secure your business the Zero Trust way
Viet Nis advises & configures MFA, permissions and access control on Google Workspace / Microsoft 365.
