PhotoDNA is a technology developed
by Microsoft that computes hash values of images in order to identify alike
images. It is used with Microsoft's own services Bing and OneDrive, as well as by Google Gmail, Twitter, Facebook and the National Center for Missing & Exploited Children, to whom Microsoft donated the
technology.
It said it had made the PhotoDNA
tool available to tackle the 720,000 abuse images uploaded to the net every day.
Microsoft said the online tool was for small firms that lack
the resources to do image-checking themselves.
Spotting abuse images among the 1.8 billion pictures uploaded
to online services every day was an almost impossible task, said Courtney
Gregoire, a senior lawyer at Microsoft's Digital Crimes Unit in a blogpost
outlining the initiative.
"We needed an easier, more scalable way to identify and
detect these worst-of-the-worst images," said Ms Gregoire.
Many of the images shared online
have been seen before and spotting people trading them can help police forces
unearth abusers previously unknown to them.
The free service puts PhotoDNA in the cloud and
lets websites check images uploaded by users.
"It's definitely going to help," said
Christian Berg of NetClean which uses the PhotoDNA technology in the image
analysis software it makes for police forces and large companies.
"Especially for the smaller firms that cannot afford to do this
themselves.
"Those smaller services are regularly
exploited by people that like to share abuse images online," he said.
Sources-
BBC, Wikipedia, Microsoft
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