Metadata analysis and pattern recognition of publicly available data is one.<p>Better data organization tools are another (a family member is studying forensic science and has done internships with large-ish police departments that still largely use printed and hand-written documents to manage cases)<p>But that&#x27;s my point.  I haven&#x27;t done much thinking on this either, so I can&#x27;t see around the corners of time to see what it could be.  But just more yelling back and forth about encryption isn&#x27;t accomplishing much.<p>Maybe it&#x27;s not a bits and bytes technical problem, but it&#x27;s technical according to the definition of the adjective, &quot;of or relating to a particular subject, art, or craft, or its techniques.&quot;  If the Paris police had the information, but were unable to properly analyze it, that&#x27;s completely a technical problem.