Credit cards are the currency of the internet. But they aren't greasing the axles of commerce, because they weren't designed for customer-not-present.
How does the current system *really* work (the banks don't actually know, I've discovered).
What would be a better system?
And, until someone makes it, what can be done to shore up the current system, so that internet commerce can happen without uneconomic amounts of fraud?
You may download the slides of this talk from here.