Privacy groups say Facebook's new Face Print technology could compromise users' personal biometric data.Earlier this year the social media firm launched software will allow it to recognise people in pictures, letting their friends tag them online.Electronic Frontier Foundation attorney Jennifer Lynch told the New York Times: “Facebook tries to explain their practices in ways that make Facebook look like the good guy, that they are somehow protecting your privacy.”But it doesn't get at the fact that they are scanning every photo”.In its privacy statements, Facebook says: “We'll let you know when someone else uploads a photo of you as their profile picture. We're doing this to prevent people from impersonating others on Facebook.'You'll hear from us if you're in a photo and are part of the audience, even if you haven't been tagged. You can choose whether to tag yourself, leave yourself untagged, or reach out to the person who posted the photo if you have concerns about it.'Finally, we'll make it easier for people with visual impairments to get more out of Facebook. Now, with face recognition, visually impaired people who use screen readers will know who appears in photos in their News Feed even if people aren't tagged.'