HMM: Spy agency ducks questions about ‘back doors’ in tech products.

These so-called back doors enable the NSA and other agencies to scan large amounts of traffic without a warrant. Agency advocates say the practice has eased collection of vital intelligence in other countries, including interception of terrorist communications.

The agency developed new rules for such practices after the Snowden leaks in order to reduce the chances of exposure and compromise, three former intelligence officials told Reuters. But aides to Senator Ron Wyden, a leading Democrat on the Senate Intelligence Committee, say the NSA has stonewalled on providing even the gist of the new guidelines.

“Secret encryption back doors are a threat to national security and the safety of our families – it’s only a matter of time before foreign hackers or criminals exploit them in ways that undermine American national security,” Wyden told Reuters. “The government shouldn’t have any role in planting secret back doors in encryption technology used by Americans.”

Wyden has long been solid on digital privacy.