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Microsoft said the online tool was for smaller web firms without the resources to do image-checking themselves but now has launched a free service that helps identify and remove these photos, is now available in the cloud of which more than 70 companies including Facebook and Twitter are already using it.
Companies and organizations can learn how to access these free tools to help protect their businesses and curb the spread of child sexual abuse images on the PhotoDNA Cloud Service site.
"While it was possible to identify illegal images if they were exact matches of known sexual abuse photos, perpetrators could keep the photos from being detected by changing them slightly", says Courtney Gregoire, a senior attorney at Microsoft’s Digital Crimes Unit.