Are Passkeys Safely Synced Across Multiple Devices?
Security Boulevard, Friday, January 30th, 2026
Ever wonder why you can create a passkey on your iPhone and it just magically works on your MacBook? It feels like cheating, but it's actually just clever engineering.
Basically, a synced passkey is a fido credential that lives in your cloud account instead of being stuck on one physical chip. Think of it like this:
- Hardware-bound keys: These are locked to a specific device, like a YubiKey or a TPM chip in a laptop. If you lose the device, you're locked out.
- Synced passkeys: Your cloud provider (Apple, Google, or Microsoft) acts as a secure vault. They encrypt the private key and sync it across all your logged-in devices.
- The fido alliance role: They wrote the specs so different companies can actually talk to each other, making passkeys a real standard rather than a walled garden.
According to the FIDO Alliance, passkeys are designed to be easier than passwords while keeping the public-key cryptography that makes them secure.