Pen register - Smith v. Maryland, 442 U.S. 735 (1979)[1], was a case in which the Supreme Court of the United States held that the installation and use of the pen register was not a "search" within the meaning of the Fourth Amendment, and hence no warrant was required.
Privacy and law enforcement: federal electronic surveillance law; intelligence, terrorism, and national security
Privacy and Government Records and Databases: Public Access to Government Records; Government Records of Personal Information
Privacy, Business Records, and Financial Information: The Collection and Use of Personal Data; Regulating Business Records and Databases
Privacy, Business Records, and Financial Information: Government Access to Financial and Business Records; Privacy Policies: Private vs. Public Enforcement
Pen register - Smith v. Maryland, 442 U.S. 735 (1979)[1], was a case in which the Supreme Court of the United States held that the installation and use of the pen register was not a "search" within the meaning of the Fourth Amendment, and hence no warrant was required.
Privacy and law enforcement: federal electronic surveillance law; intelligence, terrorism, and national security
Privacy and Government Records and Databases: Public Access to Government Records; Government Records of Personal Information
Privacy, Business Records, and Financial Information: The Collection and Use of Personal Data; Regulating Business Records and Databases
Privacy, Business Records, and Financial Information: Government Access to Financial and Business Records; Privacy Policies: Private vs. Public Enforcement