National Security Letters in Foreign Intelligence Investigations: A Glimpse of the Legal Background and Recent Amendments

[摘要] This report discusses the National Security Letters (NSLs), which seek customer and consumer transaction information in national security investigations from communications providers, financial institutions, and credit agencies.

[发布日期] 2010-12-27 [发布机构] Library of Congress. Congressional Research Service.

[关键词] Intelligence services;Intelligence activities;Business intelligence;Espionage