He explains it.
You go to an office set aside for this and give them some rings. You get a name, a password, and a little highly secured encryption widget. This is a 'virtual necklace' that has exactly as many rings as you put in. You can withdraw the rings in your virtual necklace by visiting the place and giving the correct password and having the widget - with a slightly longer verification process if you've forgotten one or both of those things, and a grace period for his bank to give the rings back if you want to withdraw a really huge amount all at once.
Web site owners can put in a bit that connects to a set of computers that only do virtual necklace transactions. It will show a prompt saying 'you are sending 30 rings to...' You have to enter your password and the six digit number on the encryption device, and then it will verify that the info is accurate, and then it will subtract rings from your virtual wallet and give a transaction number. (The transaction number is for tracking disputes and such.) There's also a nice program that shows transaction history and status and so on.
When you receive rings, you get them all at once, once every 10 days, and pay a transaction fee of 1/288 of all rings received (rounded up). It's free for spenders to encourage people to spend, but businesses will find that they are a lot more trusted online and have an easier time finding customers if they have a Virtual Necklace.
As to fraud and disputes - he's mostly concerned about customers who send money and then get defrauded and complain (he wants it to be as easy as possible for customers, and have a reputation for security, so everyone uses it), or people pulling complicated schemes involving moving money around and this somehow reflecting badly back on the virtual bank. You can cancel and raise disputes about transactions, and have it automatically reversed or sent to someone to review the dispute and decide what to do, depending on circumstances. He hasn't worked out all the details on that yet, and kind of needs a lawyer's input there.
He also has lots of technical detail about how it works and how it should be fraud-resistant and fast on the back end, which he does his best to explain in understandable terms.