Overview
The “'electronic communication' means any transfer of signs, signals, writing, images, sounds, data, or intelligence of any nature transmitted in whole or in part by a wire, radio, electromagnetic, photoelectronic or photooptical system that affects interstate or foreign commerce, but does not include (A) any wire or oral communication; (B) any communication made through a tone-only paging device; (C) any communication from a tracking device (as defined in section 3117 of this title); or (D) electronic funds transfer information stored by a financial institution in a communications system used for the electronic storage and transfer of funds."
Title I of the ECPA protects wire, oral, and electronic communications while in transit. It sets down requirements for search warrants that are more stringent than in other settings. Title II of the ECPA, the Stored Communications Act (SCA), protects communications held in electronic storage, most notably messages stored on computers. Its protections are weaker than those of Title I, however, and do not impose heightened standards for warrants. Title III prohibits the use of pen register and/or trap and trace devices to record dialing, routing, addressing, and signalling information used in the process of transmitting wire or electronic communications without a court order.
Electronic Communications Privacy Act of 1986 (ECPA, Pub.L. 99-508, 100 Stat. 1848, enacted October 21, 1986, codified at 18 U.S.C. §§ 2510–2522) was enacted by the United States Congress to extend government restrictions on wire taps from telephone calls to include transmissions of electronic data by computer. Specifically, ECPA was an amendment to Title III of the Omnibus Crime Control and Safe Streets Act of 1968 (the Wiretap Statute), which was primarily designed to prevent unauthorized government access to private electronic communications.
The ECPA also added new provisions prohibiting access to stored electronic communications, i.e., the Stored Communications Act,18 U.S.C. §§ 2701-12. The ECPA also included so-called pen/trap provisions that permit the tracing of telephone communications. §§ 3121-27. Later, the ECPA was amended, and weakened to some extent, by some provisions of the USA PATRIOT Act. In addition, Section 2709 of the Act, which allowed the FBI to issue National Security Letters (NSLs) to Internet service providers (ISPs) ordering them to disclose records about their customers, was ruled unconstitutional under the First and Fourth Amendments in ACLU v. Ashcroft (2004). It is thought that this could be applied to other uses of National Security Letters.
Read more about this topic: Electronic Communications Privacy Act