Request for clarification on the usage of Domain and Challenge Parameters

[Sh-Amir]

This issue refers to the security review requested at w3c/security-request/#55.

In Section 2.1, I would recommend providing additional information or changing the wordings regarding the usage of "Domain" and "Challenge" parameters to better highlight the scenarios in which their usage becomes mandatory. I do agree that not all use cases demand replay protection, but it would be nice to make this explicit by providing examples or adding a note to better highlight this aspect.

[TallTed]

in issue title, s/uage/use/

[Sh-Amir]

in issue title, s/uage/use/

Thanks for pointing out the typo.

[brentzundel]

We are grateful for this response from SING and look forward to considering it as part of a future version of the specification