The vendor, who would see that I'd sent it, would be confident that they could then send the product to me, and then when I received it, at least two of the three people engaged in the transaction -- vendor, buyer, site administrator -- would have to sign the transaction off with a unique digital signature, and then the money would be transferred.
Sælgeren kan se  jeg har sendt pengene, og kan trygt sende  varen til mig. Når jeg så modtager  forsendelsen vil mindst to af de tre  der er involveret i transaktionen -- sælger, køber og administrator -- underskrive den med en unik digital signatur, og pengene bliver overført.