Not so long ago, those who trafficked in pornographic images of children kept to the shadows, operating their nefarious business far from mainstream channels. Then along came the Internet. The advent of instant publishing and file sharing has opened a global e-marketplace for child porn, with law enforcement lagging far behind tech-savvy traffickers.

Hany Farid, a computer scientist from Dartmouth College, was appalled to learn that not only is this illicit business booming, “but the children...

Want more? Sorry, the full text of this article is only available to subscribers. Subscribe now.

Already a subscriber? Please log in by entering your email address and password into the red login box at the top-right corner of this page.

Need to register for your premium online access, which is included with your paid subscription? Register here.

Tracker Pixel for Entry