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

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Phishing-Resistant Authentication for transitional hybrid environments with AD and Azure AD using Smart cards – Yubico

TaxManagement - Commercial & Investment Solutions

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The Best 2FA Apps 2023: Authy vs Google Authenticator & More

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Yubico Authenticator with Smart Cards on iOS — Yubico Authenticator User Guide documentation

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Unifyia