According to a letter obtained by WIRED, a little-known surveillance program called Data Analytical Services (DAS) has been secretly collecting and analyzing more than a trillion domestic phone records within the U.S. each year. The program, which was formerly known as Hemisphere, is run by the telecom giant AT&T in coordination with federal, state and local law enforcement agencies.
The program uses a technique known as chain analysis, which targets not only those in direct phone contact with a criminal suspect but anyone with whom those individuals have been in contact as well. This means that innocent people who have no connection to any crime can have their phone records swept up and scrutinized by the authorities.
The program allows law enforcement agencies to access the records of any calls that use AT&T’s infrastructure, which covers a large portion of the country. The records include the phone numbers, dates, times, durations and locations of the calls, as well as the names and addresses of the subscribers.
The DAS program raises serious concerns about the privacy and civil liberties of millions of Americans. It operates without any judicial oversight or public accountability and violates the Fourth Amendment, which protects people from unreasonable searches and seizures.
Hellbound and Down 