Pew Research Center. November 12, 2014.
Privacy evokes a constellation of concepts for Americans—some of them tied to traditional notions of civil liberties and some of them driven by concerns about the surveillance of digital communications and the coming era of “big data.” While Americans’ associations with the topic of privacy are varied, the majority of adults polled in this survey feel that their privacy is being challenged along such core dimensions as the security of their personal information and their ability to retain confidentiality. [Note: contains copyrighted material].
http://www.pewinternet.org/files/2014/11/PI_PublicPerceptionsofPrivacy_111214.pdf [PDF format, 57 pages].