This morning, wamu.org : The Diane Rehm Show featured guests Robert O’Harrow, author of “No Place to Hide,” Bruce Schneier, security expert and blogger, and Joe Whitley, the former general counsel of the Department of Homeland Security.  The show outlined the current tensions between security and privacy and highlighted the threats to privacy brought about by advances in infomation technology, data minining and even medical technology.  While some of these issues may seem a bit tiresome for those who study security and privacy, the guests emphasized an important point: Threats to privacy are not well-understood by the public, which may be a reason for the general lack of concern over the overextension of the NSA’s surveillance powers.