Immigrants could lose citizenship based on "unknown" information that the ATLAS system provides to authorities.

ATLAS software, used by the Department of Homeland Security (DHS) to scan the records of millions of immigrants, can automatically mark naturalized Americans for citizenship revoking , based on secret criteria.

This is revealed by an investigation by The Intercept based on documents it obtained, which explains that the system takes information from immigrant case files and compares them with various federal databases.

"ATLAS looks for indicators that someone is dangerous or dishonest and is apparently designed to detect fraud among people who come into contact with the US immigration system," the report states.

It is indicated that there are several "unknown sources" that feed the database and the reports, but the information review from the FBI and the National Crime Information Center could be confirmed .

The system operates on Amazon servers that allowed, in 2019, to perform 16.5 million reviews, marking "more than 120,000 cases of possible fraud or threats to national security and public safety."

Although the system provides the files of immigrants to take away their citizenship , it is DHS officials who analyze and make a final decision.

“From what we can look at in terms of the bottom line… there are many reasons to view ATLAS as a threat to naturalized citizens,” said Laura Bingham, attorney for the Open Society Justice Initiative.

DHS refuses to reveal to the public how exactly ATLAS works or at least the rules it enforces and puts an immigrant in danger.