Privacy is not something that one has, but something that one seeks to achieve. It requires constant negotiation as information flows and contexts shift. Privacy is particularly complicated in a networked era because of the ease with which people can share information, the increased availability of persistent data, and the ongoing ways in which contexts collapse. To achieve privacy in a networked world, people must actively try to manage the various social situations in which information is accessed, consumed, interpreted, and shared. They cannot simply focus on restricting the flow of information; they must also account for the ways in which information is inferred and used.