You’ve probably heard of passkeys: the shiny new "password killer" from Apple, Google, and Microsoft. Most are synced passkeys—they float across your devices via the cloud. Convenient? Yes. But they share a subtle weakness: a sophisticated attacker who compromises your iCloud or Google account could potentially clone those keys from afar.
Imagine a world where "hacking your password" is impossible—not because your password is a 20-character monster of symbols you can’t remember, but because the key to your account literally never exists on a server to steal.
They are bound to that device by physics and cryptography.