What is passwordless?
Multi-factor authentication (MFA) is a great way to secure your organization, but users get frustrated with the additional layer on top of having to remember their passwords. Passwordless authentication methods are more convenient because the password is removed and replaced with something you have plus something you are or something you know.
|Something you have||Something you are or know|
|Passwordless||Phone or security key||Biometric or PIN|
Each organization has different needs when it comes to authentication. Microsoft currently offers Windows Hello for our Windows PCs. We are adding the Microsoft Authenticator app and FIDO2 security keys to the passwordless family.
Microsoft Authenticator App
Allow your employee’s phone to become a passwordless authentication method. You may already be using the Microsoft Authenticator App as a convenient multi-factor authentication option in addition to a password. But now, it’s available as a passwordless option.
It turns any iOS or Android phone into a strong, passwordless credential by allowing users to sign in to any platform or browser by getting a notification to their phone, matching a number displayed on the screen to the one on their phone and then using their biometric (touch or face) or PIN to confirm.
FIDO2 security keys
FIDO2 security keys are an unphishable standards-based passwordless authentication method that can come in any form factor. Fast Identity Online (FIDO) is an open standard for passwordless authentication. It allows users and organizations to leverage the standard to sign in to their resources without a username or password using an external security key or a platform key built into a device.
For public preview, employees can use external security keys to sign in to their Azure Active Directory Joined Windows 10 machines (running version 1809 or higher) and get single-sign on to their cloud resources. They can also sign in to supported browsers.
While there are many keys that are FIDO2 certified by the FIDO Alliance, Microsoft requires some optional extensions of the FIDO2 CTAP specification to be implemented by the vendor to ensure maximum security and the best experience.
A security key MUST implement the following features and extensions from the FIDO2 CTAP protocol to be Microsoft-compatible:
|#||Feature / Extension trust||Why is this feature or extension required?|
|1||Resident key||This feature enables the security key to be portable, where your credential is stored on the security key.|
|2||Client pin||This feature enables you to protect your credentials with a second factor and applies to security keys that do not have a user interface.|
|3||hmac-secret||This extension ensures you can sign in to your device when it's off-line or in airplane mode.|
|4||Multiple accounts per RP||This feature ensures you can use the same security key across multiple services like Microsoft Account and Azure Active Directory.|
The following providers offer FIDO2 security keys of different form factors that are known to be compatible with the paswordless experience. Microsoft encourages customers to evaluate the security properties of these keys by contacting the vendor as well as FIDO Alliance.
If you are a vendor and want to get your device on this list, contact Fido2Request@Microsoft.com.
FIDO2 security keys are a great option for enterprises who are very security sensitive or have scenarios or employees who aren’t willing or able to use their phone as a second factor.
What scenarios work with the preview?
- Administrators can enable passwordless authentication methods for their tenant
- Administrators can target all users or select users/groups within their tenant for each method
- End users can register and manage these passwordless authentication methods in their account portal
- End users can sign in with these passwordless authentication methods
- Microsoft Authenticator App: Will work in scenarios where Azure AD authentication is used, including across all browsers, during Windows 10 Out Of Box (OOBE) setup, and with integrated mobile apps on any operating system.
- Security keys: Will work on lock screen for Windows 10 version 1809 or higher and the web in supported browsers like Microsoft Edge.