Date Added: Nov 2011
Hidden terrorist cells in high dimensional communications networks arise when terrorists camouflage connectivity to appear randomly connected to the background network. The authors investigate hidden network detectability when the background network does not support terrorist activities. Using two September 11 terrorist networks as the test bed and a network measure called assortativity, they suggest hidden terrorist networks can behave as Peer-to-Peer networks. They compare the September 11 hidden networks with Peer-to-Peer networks containing embedded terrorist networks, as well as with generic Peer-to-Peer networks.