Government Collection of Private Information: Background and Issues Related to the USA PATRIOT Act Reauthorization [December 23, 2009] [open pdf - 296KB]
"Congress enacted the USA PATRIOT Act soon after the 9/11 terrorist attacks. The most controversial sections of the Act facilitate the federal government's collection of more information, from a greater number of sources, than had previously been authorized in criminal or foreign intelligence investigations. The Foreign Intelligence Surveillance Act (FISA), the Electronic Communications Privacy Act (ECPA), and the national security letter (NSL) statutes were all bolstered. With the changes came greater access to records showing an individual's spending and communication patterns as well as increased authority to intercept e-mail and telephone conversations and to search homes and businesses. In some cases, evidentiary standards required to obtain court approval for the collection of information were lowered. Other approaches included expanding the scope of information subject to search, adding flexibility to the methods by which information could be collected, and broadening the purposes for which information may be sought."
CRS Report for Congress, R40980