https://www.sciencemag.org/news/2016/05/your-call-and-text-records-are-far-more-revealing-you-think https://www.sciencemag.org/news/2016/05/your-call-and-text-r

https://www.sciencemag.org/news/2016/05/your-call-and-text-records-are-far-more-revealing-you-think https://www.sciencemag.org/news/2016/05/your-call-and-text-r... Metadata can be as damning as the actual message data, and in a lot of places you don't want the authorities to know that you are even communicating at all.