Definition of Electronic Communications Privacy Act
The Electronic Communications Privacy Act of 1986 (ECPA) was approved by the United States Congress to regulate monitor the U.S. government to access any kind of electronic communication just like the internet or telephone. Restrictions have been imposed on the wiretapping of telephone calls or transmissions of electronic data by computers.
Access to electronic communications that are already stored is also strictly prohibited. This act only allows pen trapping or pen register to log the numbers that are dialed from a particular telephone line.