this post was submitted on 13 Mar 2026
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If they arent on a USB stick, protected against being copied, they are only a single factor that instill false safety.
Depends on the system. The thing where your password manager is managing your passkeys? That's a single factor unless it's doing something tricky that none of them do.
When it's the tpm or a Bluetooth connection to your phone? That's actually two factors, and great.
Can it be copied from your phone? (e.g. by migrating your phone via a backup)
Then it can be compromitted and is essentially a single factor (because some website permit you to login via the key only).
Only if you'd need to completetly renew the key, then it's truly secure.