especiallyissidents, for countries like egypt where they might be afraid to talk democracyut liberalnd secular values and things like that. there is a huge range of communities that use these kinds of platforms. you mentioned that it is decentralized and very difficult for them to control. that is the kreis across all of these technologies, the virtual private network. the content cannot be controlled by google that created the technology. -- cannot be controlled by the people that created the technology. putting in place, the content cannot be controlled. >> how many people are using these networks, this dark net? are we talking tens of millions, hundreds of millions of people? >> estimating who uses the dark net is extremely difficult. one way of looking at it is the amount of money going through online drug websites which makes up a significantly large portion. we are looking at buildings and billions of u.s. dollars moving cocaine alone. it is extremely difficult to tell who is using it and where. it is significant and its use is growing in the light of the revelations and increa