Now Playing: 10-09-13 Marketplace Tech - Behind the Silk Road

We've been covering news about underground online market Silk Road since federal agents arrested the site's alleged founder in San Francisco last week. Today there's a bail hearing for Ross Ulbricht. Authorities say he masterminded the so-called eBay of drugs. Just using Silk Road, though, was a tricky process. Buyers and sellers had to deal in digital currency and use a kind of identity protection software called Tor.