Home » BBC News - Technology » technology news » Extremist images 'fingerprinted' by tech firms Extremist images 'fingerprinted' by tech firms Unknown 3:36 PM BBC News - Technology technology news Facebook, Microsoft, Twitter and YouTube link up to curb the spread of extremist images on the platforms. from BBC News - Technology http://ift.tt/2gZFspC Share: Facebook Twitter Google+ StumbleUpon Digg Delicious LinkedIn Reddit Technorati