United States orders removal of DeepSeek from civilian agency computer systems

The U.S. federal administration has intensified its technological protection measures against potential information leaks to Beijing. Through a directive adopted on October 19, 2026, and effective the following day, the Department of Homeland Security requires the purging of these artificial intelligence tools from civilian networks and strictly bans any future acquisitions linked to the firm.

The government mandate extends to both the company's subsidiaries and third-party services developed on DeepSeek's technical implementations. The Department of Homeland Security justified the measure after detecting threat vectors that could lead to the transfer of sensitive information to the People's Republic of China, in addition to security vulnerabilities identified in the firm's application for the iOS operating system.

The federal order warns that the use of these tools by public employees or government contractors allows for the collection of intelligence on U.S. citizens and agency programs. An internal department memorandum issued in July 2026 had already requested that agencies monitor incoming and outgoing traffic on their websites to detect connections associated with this computing infrastructure.

Technical scope regarding external tools

The instruction is not limited to the direct DeepSeek web interface but affects the ecosystem of programs built from its code. Although the foundational model is open and allows for execution on local servers or in data centers located on U.S. soil through intermediaries, the firm's developers maintain a version hosted on servers located within China for users of their portal.

The Department of Homeland Security determined that these models present multiple threat vectors to federal confidentiality. The restriction covers both the company's subsidiaries and third-party products and services developed from DeepSeek implementations, while also preventing affected agencies from making new purchases linked to this technology.

History of bans inside and outside the United States

The Department of Homeland Security resolution expands on a series of blocks adopted in stages within the public administration. The U.S. Department of Commerce and the Navy had already banned DeepSeek on their computer terminals, a path followed by the state administrations of New York, Tennessee, and Virginia on their respective government networks.

Internationally, the Australian government banned the presence of these models on public agency devices in February 2025. That same year, Italy's data protection authority demanded the platform be blocked after labeling the company's explanations regarding the processing and privacy of information handled on its servers as entirely insufficient.

Doubts regarding data management intensified in April 2025, when a special committee of the U.S. House of Representatives on the Chinese Communist Party accused the firm of sending U.S. user data to Beijing authorities. The same parliamentary report noted that DeepSeek may have used some 60,000 Nvidia processors in its infrastructure, including 20,000 components subject to Washington's export control regime.

Impact on the artificial intelligence market

DeepSeek burst into the tech sector on January 27, 2025, after announcing a model developed at a cost of less than 5 million dollars, which triggered a 16% drop in Nvidia shares and wiped about 600 billion dollars from the semiconductor company's market capitalization. The estimated global loss for the U.S. tech sector exceeded 1 trillion dollars that day due to the competitive capacity shown against Western systems.

Since then, the Chinese company has maintained its technical release schedule. In April 2026, it presented the preliminary version of its V4-Pro model with a commercial price 98% lower than OpenAI's GPT-5.5 Pro and distributed for free under an MIT license, to which it added an update focused on processing efficiency called V4.1-Flash in October 2026.

The next regulatory checkpoint is set for October 29, 2026, the date on which the Federal Communications Commission will vote on a ban preventing Chinese laboratories from conducting technical tests on electronic devices intended for the U.S. market.