But this isn’t any run-of-the-mill Bitcoin address; It combines the three users’ public encryption keys, created based on a private encryption key generated when they installed DarkMarket, to offer what’s known as a “multisignature” address.
“Inside DarkMarket: a Silk Road the FBI can’t touch” via Wired
I find it amazing to hear how sophisticated these dark networks are becoming (regardless of the fact that I don’t support what actually gets bought and sold in them).