Use Case: storing WebCrypto generated public key for an app

@bbfish wrote:

I have a simple foaf-browser application that can produce a public key using Http-Signature ((but this issue would be the same were I to use webid-rsa)). I can’t really test it without saving that key. So I need a space for the application to save that key which can then identify the application when used by that browser.

There has been some discussion on with @timbl and would like to invite more here.