Researchers at various universities have come up with cybersecurity software that tricks hackers into revealing the tactics they use to penetrate and control computer systems. Instead of blocking hackers, the software ingeniously invites hackers in, routes them to a decoy Web site or network, and then studies their behavior as they reveal their nefarious methods. For example, the DEEP-Dig ((DEcEPtion DIGging) software transforms hackers into "a source of free labor," says Kevin Hamlen, a member of the research team and Eugene McDermott Professor of Computer Science professor at the University of Texas at Dallas.