Phone numbers, browser histories, and social media posts are all examples of the sort of data that could be mined from those entering the US under Trump’s “extreme vetting” policy, Department of Homeland Security secretary John Kelly said today.

As Talking Points Memo reported, Kelly held a press conference this afternoon to discuss the president’s new (and massively unpopular) travel ban. When pressed to explain what the “extreme vetting” part of the order could involve, Kelly answered, “It might be certainly an accounting of what websites they visit.” He stressed, however, that the new rules—whatever form they may take—are still “under development.”

“It might be telephone contact information [and] social media,” he continued. “We have to be convinced that people that come here, there’s a reasonable expectation that we don’t know who they are and what they’re coming here for and what their backgrounds are.”

Source: Trump’s ‘Extreme Vetting’ for US Visitors Could Involve Social Media Posts and Browser Histories