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Passkeys are a trap. Do not use them
(nonfunctional.substack.com)
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this post was submitted on 12 Oct 2026
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Privacy
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Passkeys can be transferrable and syncable ( see keepassx, bitwarden, and relatives). But ideally, eventually, you never sync them because every time you log into a service with a new device, that device gets its own passkey. No need to sync them and you can revoke a devices access if it is lost or stolen without effecting any other device. They are closer to client certs than passwords in that respect.