NPR: Not-So-Private Metadata

NPR: Not-So-Private Metadata, On The Media:

The NSA has defended its controversial surveillance program by arguing that it just collects metadata, and therefore doesn’t violate the privacy of individual Americans. But computer scientists at Stanford Security Lab have conducted their own simulation of the NSA’s program, and found the metadata to be inherently revealing. Bob speaks with Jonathan Mayer, one of the researchers on the project, about how much can be learned just from the numbers.