Dave Schroeder, a national security strategist and cybersecurity expert at the University of Wisconsin-Madison, said Americans may be vulnerable because China has an app on millions of cell phones.
The content that can be pushed on TikTok is also a problem, he said, even if most of it is benign.
“There’s a concern there that the messages or the narratives that might be subtly pushed on TikTok are going to be those that are supported by the Chinese government,” he said.