The rise of commercial encryption technology, they say, risks shielding terrorists from surveillance — raising the bar for law enforcement to thwart future attacks.

“We in many respects have gone blind as a result of the commercialization and the selling of devices that cannot be accessed either by the manufacturer or, more importantly, by us in law enforcement, even equipped with the search warrants and judicial authority,” New York City Police Commissioner William Bratton said Sunday on “Face the Nation.”

Some lawmakers have revived calls for congressionally mandated access to devices. 

“In the Senate Armed Services, we’re going to have hearings on it and we’re going to have legislation,” Sen. John McCain (R-Ariz.), who chairs the committee, told reporters on Tuesday, calling the status quo “unacceptable.”