The 'empty space' is the encrypted blob. The unknown variable that the rubber hose encryption system exploits is that the interrogator doesn't know what's insi

The 'empty space' is the encrypted blob. The unknown variable that the rubber hose encryption system exploits is that the interrogator doesn't know what's inside that blob, and there might be several 'partitions' inside. Edit: I think we're on the same page. That's why I said it doesn't seem to be relevant here. I don't see how it could be pulled off conveniently within html.