US Bans DeepSeek From Federal Civilian Systems Citing Security Risks The US has banned Chinese AI developer DeepSeek from federal civilian systems, citing security risks, under a Department of Homeland Security order issued through the Federal Acquisition Supply Chain Security Act. China opposed the move, saying it overreaches the concept of national security. The US has banned Chinese AI developer DeepSeek from federal civilian systems, citing security risks, in a move that China has opposed, saying it overreaches the concept of national security. This decision follows a Department of Homeland Security order under the Federal Acquisition Supply Chain Security Act.