I think it means that while those weaknesses capabilities have not gone away, the data exposed to such, might evaporate (be moved away) from such exposure. Example, the claim that FSB is moving to typewriters.[1] Or criminals moving to other methods of communication, if they perceive the internet as inherently insecure.
[1]http://www.globalpost.com/dispatch/news/afp/130711/kremlin-t...