Re: [webauthn] Consider allowing cross-domain credential use (#1372)

On 2020-02-19 webauthn call:

@sbweeden issues with cross-origin iframes:
* dirk has reported that some pymts folk want only 1st party network connections
* introduces complexity to RPs to host the PISPs iframes

wrt 3d party credentials approach:
* the pisp needs to be known to issuer at time of cred creation -- in contrast using RP ID mapping (eg facetID approach from uaf/u2f) provides late binding

@nadalin 
* banks have expressed not having the user establish rel with issuer on behalf of PISP is too much friction (?)
* this will be discussed again in public-webauthn-pay@ call in 2 weeks
* requests leave this issue open and we see what happens

@agl requests that we need detailed info on why cross-origin iframes are insufficient or onerous in web context
@christiaanbrand requests input from the (web) payments folk here also

@jcjones notes that if we add yet another so-called same-origin-policy violation/relaxation we're further stirring the architecture pot....

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Received on Wednesday, 19 February 2020 20:39:25 UTC