Can a passkey provider store credentials across devices?

Yes, some passkey providers support storing and synchronizing credentials across devices, but this depends on the type of provider and how the underlying WebAuthn implementation works.

There are two primary categories of passkey providers:

• First-party passkey providers (e.g., Apple iCloud Keychain, Google Password Manager, Microsoft Authenticator) can sync passkeys across devices logged into the same ecosystem.
• Third-party passkey providers (e.g., 1Password, Bitwarden, Dashlane) may offer their own mechanisms for syncing passkeys across multiple devices.

• Cloud Syncing: First-party providers like Apple and Google store passkeys in their cloud infrastructure (iCloud Keychain, Google Password Manager), enabling automatic synchronization across devices linked to the same account.
• End-to-End Encryption: Passkeys stored by major providers are end-to-end encrypted, ensuring only the user can access them.
• Third-Party Syncing: Some password managers integrate with WebAuthn and provide secure passkey syncing across platforms.

• Passkey Security: Since passkeys eliminate traditional passwords, their secure storage is critical. Providers use strong encryption to prevent unauthorized access.
• Platform Lock-In: First-party solutions may limit cross-platform usability (e.g., iCloud Keychain works best within the Apple ecosystem).
• Manual Transfer: Some providers may require manual export/import if automatic syncing is not available.

In summary, passkeys can be stored and accessed across multiple devices, but this depends on the provider’s implementation. First-party ecosystems offer seamless integration, while third-party solutions provide cross-platform flexibility.