washingtontimes.com: Technology to track, curb child porn

jugendschutz.net

Pedophiles can be chased down, prosecuted and put behind bars, but in too many cases, their hideous handiwork still roams the world.

[...] This revictimization of children is about to end, thanks to a new technology called PhotoDNA, which was donated in December to NCMEC by Microsoft Corp.

With PhotoDNA, illegal child-pornography images can be broken down to their tiniest pieces, measured and assigned a unique digital "fingerprint."

Armed with a tell-tale "fingerprint," law enforcement officials can sift through millions of online images and find copies - even slightly altered ones - of an illegal photo.

When the officials find illegal copies, they can report them to the hosting Internet service provider (ISP).

The ISP can quickly "scrub" the images off their sites, said Mr. Allen. At least 68 ISPs are already interested in PhotoDNA, he added.