Internet and digital privacy are viewed differently from traditional expectations of privacy. Internet privacy is primarily concerned with protecting user information. Law Professor Jerry Kang explains that the term privacy expresses space, decision, and information. In terms of space, individuals have an expectation that their physical spaces (e.g. homes, cars) not be intruded. Privacy within the realm of decision is best illustrated by the landmark case "Roe v. Wade." Lastly, information privacy is in regards to the collection of user information from a variety of sources, which produces great discussion.