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Contextual Expectations of Privacy

Andrew D. Selbst

Yale Information Society Project; Georgetown University Law Center

March 25, 2013

35 Cardozo Law Review 643 (2013)

Fourth Amendment search jurisprudence is nominally based on a “reasonable expectation of privacy,” but actual doctrine is disconnected from society’s conception of privacy. Courts rely on various binary distinctions: Is a piece of information secret or not? Was the observed conduct inside or outside? While often convenient, none of these binary distinctions can adequately capture the complicated range of ideas encompassed by “privacy.” Privacy theorists have begun to understand that a consideration of social context is essential to a full understanding of privacy. Helen Nissenbaum’s theory of contextual integrity, which characterizes a right to privacy as the preservation of expected information flows within a given social context, is one such theory. Grounded, as it is, in context-based normative expectations, the theory describes privacy violations as unexpected information flows within a context, and does a good job of explaining how people actually experience privacy.

This Article reexamines the meaning of the Fourth Amendment’s “reasonable expectation of privacy” using the theory of contextual integrity. Consider United States v. Miller, in which the police gained access to banking records without a warrant. The theory of contextual integrity shows that Miller was wrongly decided because diverting information meant purely for banking purposes to the police altered an information flow in a normatively inferior way. Courts also often demonstrate contextual thinking below the surface, but get confused because the binaries prevalent in the doctrine hide important distinctions. For example, application of the binary third party doctrine in cases subsequent to Miller obscures important differences between banking and other settings. In two recent cases, United States v. Jones and Florida v. Jardines, the Supreme Court has seemed willing to consider new approaches to search, but they lacked a framework in which to discuss complicated privacy issues that defy binary description. In advocating a context-based search doctrine, this Article provides such a framework, while realigning a “reasonable expectation of privacy” with its meaning in society.

Number of Pages in PDF File: 67

Keywords: privacy, Fourth Amendment, civil liberties, contextual integrity, criminal procedure, constitutional law, technology

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Date posted: June 26, 2012 ; Last revised: December 20, 2013

Suggested Citation

Selbst, Andrew D., Contextual Expectations of Privacy (March 25, 2013). 35 Cardozo Law Review 643 (2013). Available at SSRN: https://ssrn.com/abstract=2093594 or http://dx.doi.org/10.2139/ssrn.2093594

Contact Information

Andrew D. Selbst (Contact Author)
Yale Information Society Project ( email )
127 Wall Street
New Haven, CT 06511
United States
Georgetown University Law Center ( email )
600 New Jersey Avenue, NW
Washington, DC 20001
United States
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