In 2024, reports emerged of a highly sophisticated cyber espionage campaign against US telecoms companies, which some analysts believe went all the way up to the Chinese government.

The group behind this campaign would later be codenamed Salt Typhoon, and it is believed to have quietly infiltrated critical US telecoms infrastructure in order to collect private information on influential Americans – including presidential candidates. In the process, it may have also swept up data from millions of ordinary Americans. The Chinese government has denied responsibility for Salt Typhoon.

We speak to former Deputy National Security Adviser Anne Neuberger, who was working inside the White House when the attacks were first uncovered. We also speak to BBC cyber correspondent Joe Tidy about how this hack unfolded – and what it reveals about who may be winning the cyber war.

Producer: Aron Keller

Sound engineer: Travis Evans

Executive producer: James Shield

Senior news editor: China Collins

(Photo: Analysts in the Security Operations Center at the Dell Secure Works office in South Carolina, US. Credit: Stephen Morton/Getty Images)