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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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The way i understand it is that remote attestation (main point of this article) makes it possible for services to deny unapproved software. They can deny off market devices, operating systems, or certain password managers. So even if you use password managers you mentioned, if you're using off market OS (e.x lineageos) they can deny access. Here's a quote from the article "Remote attestation lets a website demand cryptographic proof that your device, operating system, firmware, and passkey manager are all on an approved list."
Hm, so similar to websites blocking user agents now.