Certificate-based authentication with YubiKeys on iOS and Android

YubiKey is the sole external device supporting Azure AD Certificate-based authentication (CBA) on Android and iOS.

Tech Solvency: YubiKeys

Versasec - Mobile Certificate-based Authentication with Microsoft, YubiKeys, and Versasec

YubiKey HOTP Device Provisioning and Multi-Factor Authentication Guide

Certificate-Based Authentication (CBA) on mobile using a YubiKey, by Jonas Markström

YubiKey Begin Site Configuration Guide

How to use YubiKey as a companion device with Windows Hello – Cloud First

Yubico - FIDO Alliance

Yubikey 5 NFC /5 Nano /5C /5C NFC FIPS Token OTP U2F 4096-Bit Certificate - AliExpress

Azure AD Certificate-based Authentication (CBA) on Mobile - Microsoft Community Hub

Bypassing LastPass's “Advanced” YubiKey MFA: A MITM Phishing Attack

Palantir, FIDO2 secure implementation rollout

Client Certificate Authentication – text/plain

Phishing-resistant MFA on Azure AD with YubiKeys now generally available - NetuniverseCorp

Azure AD Certificate-based Authentication (CBA) on Mobile - Microsoft Community Hub

Yubico's new security keys are available in even more form factors