The term
privacy dates back to 1450 (see Feith, 2003) and is constantly adjusted to the needs of a changing society. In its original meaning, the term
privacy referred to a state of ‘being apart or belonging to oneself’, in contrast to belonging to the state. When the term
privacy is used today, especially in relation with information and communication technology, it usually refers to the concept of
informational privacy. One of the most popular definitions is probably the one by Westin (1967), who defined
privacy as ‘the claim of individuals, groups or institutions to determine for themselves when, how and to what extend information about them is communicated to others’. In this context, the term
informational privacy refers to all data about a person, in general everything other people know about a person, and especially includes individual-related data (von Locquenghien, 2006).
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