Foreigners who are allowed to enter the United States without a visa may soon be required to provide information about their social media accounts, email, and an extended family history to the Department of Homeland Security before their travel is approved.

A notice published Wednesday in the Federal Register stated that U.S. Customs and Border Protection is proposing to collect social media information for five years from travelers from certain countries who do not need a visa to enter the United States, as part of President Donald Trump's administration's intensified monitoring of international travelers and immigrants.

The announcement refers to travelers from more than 36 countries participating in the Visa Waiver Program who submit their information through the Electronic Travel Authorization (ETA) system, which automatically screens them and then approves their travel to the United States. Unlike visa applicants, they do not typically need to visit an embassy or consulate for an interview.

The program, overseen by the Department of Homeland Security, currently allows citizens of about 40 countries, mostly European and Asian, to travel to the United States for tourism or work for three months without a visa.

The announcement added that U.S. Customs and Border Protection will also begin requesting a list of other information, including phone numbers used within the past five years or email addresses used within the past decade. Metadata will also be requested from electronically submitted photos, as well as extensive information about the applicant's family members, including their places of birth and phone numbers.