05-22-2016, 12:15 PM
Data about the length of phone calls and the numbers called are enough to garner sensitive personal info about people. It's like a modern day form of numerology. They are associating and building profiles on people based on this info.
http://phys.org/news/2016-05-scientists-...itive.html
http://phys.org/news/2016-05-scientists-...itive.html