Invasion of privacy in the Internet age. Expanding the reach of law enforcement to snoop on e-mail traffic or on Web surfing. Those are among the criticisms being aimed at the FBI as it tries to update a key surveillance law.

With its proposed amendment, is the Obama administration merely clarifying a statute or expanding it? Only time and a suddenly on guard Congress will tell.

Federal law requires communications providers to produce records in counterintelligence investigations to the FBI, which doesn't need a judge's approval and court order to get them.

They can be obtained merely with the signature of a special agent in charge of any FBI field office and there is no need even for a suspicion of wrongdoing, merely that the records would be relevant in a counterintelligence or counterterrorism investigation. The person whose records the government wants doesn't even need to be a suspect.

The bureau's use of these so-called national security letters to gather information has a checkered history.

The bureau engaged in widespread and serious misuse of its authority to issue the letters, illegally collecting data from Americans and foreigners, the Justice Department's inspector general concluded in 2007. The bureau issued 192,499 national security letter requests from 2003 to 2006.

Weathering that controversy, the FBI has continued its reliance on the letters to gather information from telephone companies, banks, credit bureaus and other businesses with personal records about their customers or subscribers _ and Internet service providers.

That last source is the focus of the Justice Department's push to get Congress to modify the law.