Follow ZDNET: Add us as a preferred source When creating a passkey on Windows for a specific relying party like PayPal, Microsoft’s Edge browser engages the Windows Hello subroutines within the operating system, which in turn engage the computer’s Trusted Platform Module to securely create and store the credential. Screenshot by David Berlind/ZDNET At a high level, the passkey registration and storage workflow on Windows is similar to that of Apple’s operating systems. Like Apple’s iCloud Keychain, Microsoft operates a central cloud service through which user IDs and passwords can be synchronized across all supported platforms. However, until recently, passkeys generated using Microsoft Edge could not be synced through the same cloud. Also: Microsoft Authenticator won’t manage your passwords anymore – or most passkeys In contrast to how passkeys are mainly software-generated and encrypted on Apple platforms, Windows previously relied on a system’s TPM hardware for encrypting passkeys (after which they’d get stored elsewhere on the local device in a secure file). Once generated, only the TPM that was used to encrypt a passkey could subsequently decrypt it for usage during a passkey authentication ceremony. As such, there was no way to sync them.
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