A passkey is a sign-in credential stored on a device or password manager, rather than a string of characters you type into a website. When you log in, your device helps prove it holds the right credential—often with a fingerprint, face scan, or screen lock. That can remove some familiar password problems, but it doesn’t make account security automatic.
What happens during sign-in
Passkeys use a matched pair of digital keys: one stays private on your device, while the service keeps a related public key. The private key is not sent to the website when you sign in; your device uses it to answer a challenge from the service. This design can make passkeys harder to steal through fake login pages, because the credential is tied to the real service’s domain.
Where the risks move
You no longer need to remember a unique password for every account, but you do need a dependable way to access your passkeys. That might mean syncing through a platform account, using a password manager, or setting up another device as a recovery option. If you lose access to the account that manages your passkeys, recovery can become the weak point.
A sensible setup
Check which devices or services hold your passkeys and add an account recovery method before you need one. Keep your phone, computer, and platform accounts protected with their own screen locks and security settings. Passkeys reduce reliance on passwords; they don’t remove the need to protect the devices and accounts around them.
