  Another group of theorists characterize privacy in terms of access. Some commentators describe privacy as exclusive access of a person to a realm of his or her own, and Sissela Bok (1982) argues that privacy protects us from unwanted access by others — either physical access or personal information or attention. Ruth Gavison (1980) defends this more expansive view of privacy in greater detail, arguing that interests in privacy are related to concerns over accessibility to others, that is, what others know about us, the extent to which they have physical access to us, and the extent to which we are the subject of the attention of others. Thus the concept of privacy is best understood as a concern for limited accessibility and one has perfect privacy when one is completely inaccessible to others. Privacy can be gained in three independent but interrelated ways: through secrecy, when no one has information about one, through anonymity, when no one pays attention to one, and through solitude, when no one has physical access to one. Gavison’s view is that the concept of privacy is this complex of concepts all part of the notion of accessibility.  Furthermore, the concept is also coherent because of the related functions privacy has, namely “the promotion of liberty, autonomy, selfhood, human relations, and furthering the existence of a free society” (Gavison 1980, 347).