this post was submitted on 13 Jul 2023
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Technology

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How Hype (Passkeys) Will Turn Your Security Key Into Junk (fy.blackhats.net.au)
submitted 1 year ago* (last edited 1 year ago) by nihilx7E3 to c/technology
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tl;dr: passkeys, as proposed now, will fill up existing fido2/webauthn authenticators if the feature becomes widespread enough. this is because the feature of "passkeys" actually refer to resident keys, which most authenticators today can only store a limited amount of (some, none at all!). preventing this will require changes to either webauth, fido, or passkey libraries.

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[–] coldredlight 2 points 1 year ago (2 children)

I believe password managers are getting the ability to store passkeys, bitwarden is rolling it out as a new feature soon. Here's their announcement: https://bitwarden.com/blog/what-are-passkeys-and-passkey-login/

[–] oktux 2 points 1 year ago

Interesting! I wonder if they're actually storing the keys in the cloud or if they're just using Bitwarden as a way to sync keys between hardware.

In any case, it seems like your original suggestion is a good one. Thanks for the info!