The conference offered a diverse set of mostly closed-door sessions, with topics such as "Cyber Jihad and the Globalization of Warfare" and "Current Trends in Digital Forensics."
Child pornography has become a huge problem for DOD investigators, accounting for as much as 50 percent of the criminal digital evidence processing work done by the DOD's Defense Cyber Crime Center (DC3), said Steven Shirley, executive director of DC3.
The proliferation of inexpensive digital cameras and scanners has caused instances of child pornography to mushroom in the military, as elsewhere in society, said Jim Christy, director of the Defense Cyber Crime Institute at DC3.
Other hot topics at the show were techniques for capturing and analyzing data from a flood of new digital storage media, including Apple iPods, GPS (Global Positioning System) devices and portable USB (Universal Serial Bus) memory sticks, Christy said.
Government investigators working on cases, ranging from homicides to espionage, need to be aware of the wide range of new places that valuable information could be stored, he said.
"Twenty years ago, investigators used to walk right past the desktop computer when they were gathering evidence. Now they know enough to seize that, but we've got to get them to be aware of these other devices," he said.