u2f seed

Damien Miller djm at mindrot.org
Mon Jan 6 18:37:09 AEDT 2020

On Sun, 5 Jan 2020, David Lang wrote:

> I worked there and could use my token from any computer without having
> to do anything other than insert the key.

No - Google uses SSH certificates with keys backed in the tokens
(documented in [1]). This isn't U2F, they are regular SSH keys/certs
and the hardware in this case is behaving more like a PKCS#11 token
than a U2F device.


[1] https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/45728.pdf

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