[jsnell]

The RFC explicitly says that "host" doesn't necessarily mean an actual host and you still insist the opposite. So I don't really know what to say.

> One of the common security advice banks used to give is "check your browser address that you are in our server"

So you say that everyday users have an expectation that they're "in the bank's server"? That doesn't seem very concrete, since that could mean anything. Surely there is some kind of expectation they have about actual behavior or property. Something that will happen / can't happen right now, but the opposite with signed exchanges.

> Anyone who has the file can intercept the form data from that page now - a complete phishing attack.

Uhh... And just how would they do that? They can't inject anything into the page, and they can't modify the page. How do you figure they force the browser to submit the form to the wrong server?

[buboard]

> They can't inject anything into the page

assuming that someone finds a way to sign a malicious Html page (e.g. by sneaking into the editors office) they can serve it from anywhere, and the browser will pretend it's coming from the bank

[echeese]

If someone's able to get the signing key you've already failed at security.