The Justice Department late Friday filed its response to TikTok's civil suit aimed at derailing a law that would force the app to be sold or face a U.S. ban.

TikTok's suit in a Washington federal court argues that the law violates First Amendment rights of free speech. The US response counters that the law addresses national security concerns, not speech, and that TikTok's Chinese parent company ByteDance is not able to claim First Amendment rights here. The filing details concerns that ByteDance could, and would, comply with Chinese government demands for data about US users or yield to pressure to censor or promote content on the platform, senior justice department officials said in a briefing.

"The goal of this law is to ensure that young people, old people and everyone in between is able to use the platform in a safe manner," a senior justice department official said. "And to use it in a way confident that their data is not ultimately going back to the Chinese government and what they're watching is not being directed by or censored by the Chinese government." The response argues that the law's focus on foreign ownership of TikTok takes it out of the realm of the First Amendment.

US intelligence agencies are concerned that China can "weaponize" mobile apps, justice department officials said. "It's clear that the Chinese government has for years been pursuing large, structured datasets of Americans through all sorts of manner, including malicious cyber activity; including .