By this reckoning, TikTok, or for that matter any Chinese company, can’t be trusted, because China can’t be trusted. “There are probably many people at TikTok who just want to run a profitable company. But they can’t,” said Dan Harris, a founder of the law firm Harris Sliwoski, which specializes in business in China. “If you know how China works, you cannot claim that TikTok is secure.”