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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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Can you give an example?
Amazon/whatever login:
Email login:
There. You've solved 90% of online fraud that begins with website(s) leaking your credentials and someone combining leaks to gain access to everything in your life via your email (including bank, socials, porn habits, whatever).
How do you suggest enforcing it?
Enforcing what? It's up to your email service to adopt the change. The way it currently works was probably okay for the early days of the internet when people had just started using emails, but now that so much private and sensitive financial information passes through your email account, it makes little sense that the same credential you use to login to your email account (email id) is also what you must use when some random website forces you to register in order to access it, just so they can send you massive volumes of unsolicited spam.
Certainly a simpler change with more potential to do good relative to the ease of enforcing a convoluted passkey-slash-usb-slash-save-this-file-somewhere-safe implementation
I don’t understand what will stop the users from using same passwords for both services
Then you've missed the point of the change entirely. Splitting email addresses into public and private-facing addresses is one thing. Reusing passwords is entirely another evin if both are related to securtity.