The use of deepfakes to impersonate high-level officials in the U.S. presents a growing security challenge. Deepfakes also disrupt corporate boardrooms and family living rooms. Advances in artificial intelligence mean it's easier and cheaper than ever before to create lifelike audio and video. These deepfakes can be used for gaining access to sensitive systems, for committing corporate espionage and for stealing national security secrets. But the size and scope of the problem are also prompting research into the best ways to counter it. Tech companies say new programs will help governments, businesses and everyday people detect deepfakes and ensure the people they see on the screen are who they say they are.

The State Department is warning U.S. diplomats of attempts to impersonate Secretary of State Marco Rubio and possibly other officials using AI-driven technology. That's according to two senior officials and a cable sent last week to all embassies and consulates. The warning came after the department discovered that an impostor posing as Rubio had tried to reach out to at least three foreign ministers, a U.S. senator and a governor. Those details were laid out in a July 3 cable first reported by The Washington Post. The recipients of the scam messages weren't identified in the cable shared with The Associated Press. The State Department says it's investigating.

Melania Trump says it's "heartbreaking" to see teens and especially girls grapple with the fallout after they're targeted by malicious and sexually explicit online content. The first lady spoke Monday at a roundtable discussion at the Capitol on legislation to regulate revenge porn. She called on the Republican-controlled House to pass the bill and send it to President Donald Trump to sign into law. The first lady says Congress must prioritize the well-being of young people because they deserve a safe online space to express themselves freely without the threat of exploitation or harm.