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3.  Device Trust 

Authentication

# Device Trust

Device trust uses signals from a managed or attested device — MDM enrollment, disk encryption, OS version, EDR presence — as a factor in access decisions, ensuring only healthy devices can reach sensitive apps.

Last reviewed 3 months ago

Key points

-   Treats device health as an access factor alongside identity
-   Sourced from MDM (Jamf, Intune, Kandji) or EDR (CrowdStrike, SentinelOne)
-   Often combined with passkeys for phishing-resistant + device-bound auth
-   Core building block of Zero Trust and ZTNA
-   Distinct from device-bound credentials like passkeys — covers the \*device\*, not just the key

## What it is

Device trust answers, _is this device allowed to access this resource, and is it in a healthy state right now?_ It complements user identity with a check on the endpoint itself.

## How it works

The IdP or ZTNA broker pulls posture signals from MDM and EDR — disk encryption on, OS patched, EDR running, no jailbreak, in the corporate MDM tenant. A policy then evaluates: _Finance app requires fully compliant managed device; marketing site is fine from any device with a passkey._

## When buyers care

-   BYOD vs corporate-device policy enforcement
-   Replacing VPN with ZTNA
-   Reducing impact of stolen credentials by requiring a known device
-   Meeting CMMC, FedRAMP, and SOC 2 device-management requirements

## Common misconceptions

-   **Passkeys alone are not device trust.** Passkeys bind a credential to a device; device trust evaluates whether that device should be trusted right now.
-   **Device trust does not require MDM on every device.** Unmanaged devices can be evaluated with lighter signals and get reduced access.

## FAQ

### Where does device trust fit alongside identity?

It sits in the access decision: _identity + device + context → allow / challenge / deny._ IdPs increasingly integrate device-trust signals natively.

### Vendors to look at?

Okta Device Trust / Fastpass, Microsoft Intune + Conditional Access, Jamf + Beyond Identity, and dedicated ZTNA vendors all offer this.

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