Tapping data via fiber optics

Fiber Optics carries lots and lots of data , video and voice on daily basis around the globe. One of the main reasons of using fiber optics is to have secured communications.
Unlike wireless communications  the issue of tapping or unauthorised eavesdropping is of the main concern. 
But now human managed to find a way on how to tap fiber optics by using the concept of minimum bending radius..
It look easy to tap fiber optics by locating the fiber optics cable but finding the actual fiber core to tap is another story unless you know exactly which  fiber core to tap...