Zero Trust is a cyber security model based on the principle of never automatically trusting any user, device or connection, regardless of whether it originates inside or outside a business's network. Traditional security models often trusted anything already inside the office network. Zero Trust instead verifies every access request individually, based on identity, device health and context, before granting access to systems or data.
How Zero Trust works
Zero Trust is implemented through a combination of policies and technologies rather than a single tool. Multi-factor authentication verifies who a user is, Conditional Access evaluates the context of each sign-in attempt, and device compliance checks through tools like Microsoft Intune confirm a device meets security standards before access is granted. Access is also typically limited to only what each user genuinely needs, reducing the impact if any single account is compromised.
Zero Trust in practice for UK businesses
- A business requires multi-factor authentication and a compliant, managed device for every user accessing company email and files, regardless of whether they are in the office or working remotely.
- An organisation segments access so that staff only reach the specific systems and data relevant to their role, limiting the damage a single compromised account could cause.
- A company uses Conditional Access risk-based policies to automatically require additional verification when a sign-in attempt looks unusual, while allowing low-risk, routine access to proceed smoothly.
- A business moving away from a traditional office-network-trusted model adopts Zero Trust principles as part of a wider shift to hybrid and remote working.
How Advantage implements Zero Trust
Advantage designs and implements Zero Trust security architecture for UK SMEs, combining Microsoft Entra ID, Conditional Access and Microsoft Intune into a coherent security posture rather than isolated point solutions. Find out more about our cyber security services.
Frequently asked questions
Is Zero Trust a specific product a business can buy?
No. Zero Trust is a security model and set of principles rather than a single product. Implementing Zero Trust typically involves combining several technologies and policies, such as multi-factor authentication, Conditional Access and device compliance checks, configured to work together according to Zero Trust principles.
Does Zero Trust mean staff have to verify their identity for every single action?
Not in practice. Well-implemented Zero Trust uses risk-based and Conditional Access policies, so low-risk activity from a known device on a trusted network may require minimal friction, while higher-risk or unusual access attempts trigger additional verification. The aim is targeted verification rather than constant interruption.
How does Zero Trust relate to Microsoft Entra ID and Conditional Access?
Microsoft Entra ID and Conditional Access are the primary tools Microsoft provides to implement Zero Trust principles within a Microsoft 365 environment, allowing policies that verify identity, device compliance and risk level before granting access to resources.
