But it's on Microsoft's Redmond, Wash., campus where some of the most interesting and potentially controversial work is under way. Developers there are considering ways to build into the Windows environment functionality that resists child pornography. "We are working internally to create products which are not going to be susceptible to that kind of misuse," says Rich LaMagna, director of worldwide digital integrity investigations and law-enforcement outreach for Microsoft.

It's unclear how far along Microsoft has gotten, but Hemanshu Nigam, a Microsoft lawyer whose background includes investigating child pornography at the Justice Department, has begun working directly with the Windows development group. Microsoft researchers also are exploring ways to determine whether a suspected child-porn image is authentic or a doctored-up digital composite.

Innovative uses of technology can make a difference. On Feb. 3, Toronto police released digital photos found on the Internet in hopes that the public might provide information on their origin. The image of the victim, a young girl, had been digitally erased from the pictures so that only the backgrounds could be seen. Police were hoping that someone might recognize the locations where the photos were taken, even though they were a couple of years old. Within hours, police got the lead they were hoping for when they learned that the pictures were taken at Walt Disney World in Florida, providing an extremely important clue in the case.

It's small victories like this that give child-protection advocates hope, despite the ever-expanding scope of this terrible trend. "We want to attack it at all levels, the supply and the demand," Immigration agent Cantor says. The mother of three adds, "I take it very personally."

-- with Marianne Kolbasuk McGee

Illustration by Anastasia Vasilakis

Continue to the sidebar:
Picture This: Should Google Filter Its Image Database?

Continue to the column:
The Privacy Lawyer: The Pain Behind The Pictures

Continue to the blog:
Teaming Up Against Child Porn

Continue to:
Responses To Our Story "Technology And The Fight Against Child Porn"