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Re: [webauthn] Note to encourage storage of registered credential details (#1556)

From: Matthew Miller via GitHub <sysbot+gh@w3.org>
Date: Thu, 04 Feb 2021 01:58:38 +0000
To: public-webauthn@w3.org
Message-ID: <issue_comment.created-772966248-1612403918-sysbot+gh@w3.org>
This is something I'm tackling right now in my library. A user raised an issue requesting additional information out of attestation verification so that they could more closely design their RP around [Yubico's developer guide](https://developers.yubico.com/WebAuthn/WebAuthn_Developer_Guide/Registering_Multiple_Devices.html), which encourages the "credentials" table to store the following information:


So there's at least something out in the wild taking an opinionated stance on what information out of an attestation is/might be useful for future-proofing an RP as utilization of WebAuthn grows and the spec evolves.

> sounds to me like something for the webauthn adoption community group to discuss?

This guide seems like a reasonable starting point for the WACG to have this conversation considering everything except the last three are things that can be extracted from an attestation and stored fairly easily (`metadata` is how they track things like authenticator attachment, "form factor", OS, etc...). Unless someone beats me to it I can bring it up at our next meeting on 2/8.

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