It's already known that the attacks in Paris were initiated after communication over an unsecured channel: SMS. This is already monitored (don't believe for a second that there isn't some shadowy, secretive government agency storing all those messages).
They didn't act on this information because the amount of data they have is way, way too big to do anything meaningful with it. Yet, somehow, we must know all stop using secure communication so that those unreliable secret agencies can gather even more data they won't know what to do with.
As usual - she is a politician after all - she is talking out of her behind.