This is a solved technology problem[1]. A technical solution has not changed the fact that people do not want all of their pictures scanned by a third party.<p>1. <a href="http:&#x2F;&#x2F;www.ibtimes.co.uk&#x2F;microsoft-launches-free-cloud-version-photodna-help-detect-child-pornography-1511390" rel="nofollow">http:&#x2F;&#x2F;www.ibtimes.co.uk&#x2F;microsoft-launches-free-cloud-versi...</a>