Passkeys in Microsoft Entra ID: What They Are and Why They Matter
Passwords remain one of the easiest ways into a business account. Passkeys in Microsoft Entra ID close that gap with phishing resistant authentication built on public key cryptography.
Why Passwords Keep Failing
Passwords remain behind the majority of account compromises, not because people choose obviously bad ones, but because passwords can be phished, guessed, reused across multiple sites, or bought in bulk after an unrelated data breach somewhere else entirely. Multi factor authentication has closed much of that gap, but not all of it. SMS codes can be intercepted, and push notification approvals can be worn down through repeated prompts until someone approves one by mistake. Passkeys are designed to remove the weakness at its source, rather than adding another layer on top of a password that can still be attacked.
What a Passkey Actually Is
A passkey is built on public key cryptography instead of a shared secret. When a passkey is created, the device generates a public and private key pair. The private key never leaves the device, or stays within a trusted, encrypted sync such as Windows Hello, and only the public key is stored with Entra ID. Signing in proves possession of the private key without ever transmitting anything a fake website could capture or replay. That is what makes passkeys genuinely phishing resistant rather than simply harder to guess, there is no secret in transit for an attacker to steal in the first place.
Why Passkeys Help
Phishing Resistant
No secret is ever transmitted, so a fake login page has nothing worth capturing.
Faster to Use
A biometric or device PIN unlocks the key locally, no password to type or remember.
No Shared Secret
Nothing sits in a password database anywhere, waiting to be breached, reused or sprayed.
Phishing Resistance
From passwords and SMS codes to a phishing resistant passkey.
Rolling Passkeys Out Across Your Business
Entra ID supports passkeys through the Microsoft Authenticator app, physical FIDO2 security keys, and Windows Hello for Business, giving most businesses a realistic mix of options for different roles and device types. A rollout starts with enabling passkey authentication methods inside your Authentication Methods policy, deciding which passkey types to allow, and setting a realistic timeline for moving people off older, weaker sign in methods. This is exactly the kind of change we manage through our Identity and Access Management service. If your business is still relying mainly on passwords and SMS codes, passkeys are one of the more meaningful upgrades available right now.