China’s top intelligence agency on Sunday accused the U.S. National Security Agency of carrying out a yearslong cyberespionage campaign against Beijing’s national time-service network, among the nation’s most sensitive pieces of digital infrastructure.

China’s Ministry of State Security said the alleged intrusion began in early 2022 when NSA targeted the National Time Service Center, which keeps and broadcasts China’s standard time, including to telecommunications, finance, transportation, and defense organizations.

Investigators allege the hackers deployed 42 “specialized cyberattack weapons” to maintain persistence and extract network data. An overseas phone provider was exploited to gain initial access, China said, without naming the specific company. From there, U.S. cyberspies we

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