美方为何攻击我国家授时中心？一图看懂

Core Points - The Chinese National Security Agency announced evidence of cyberattacks by the U.S. National Security Agency targeting the National Time Service Center in China, starting from 2022 [1] - The U.S. exploited vulnerabilities in a foreign brand's SMS service to secretly control the mobile devices of several staff members at the National Time Service Center, stealing sensitive data [1] - From August 2023 to June 2024, the U.S. is reported to have used 42 specialized cyberattack tools to conduct large-scale attacks on the National Time Service Center, aiming to penetrate high-precision ground timing systems [1] Group 1 - The National Time Service Center, located in Xi'an, Shaanxi Province, is responsible for generating and maintaining the national standard time, which aligns closely with Coordinated Universal Time (UTC) [3] - The center is considered an ideal location for timekeeping due to its stable geological structure [4] - The core equipment, atomic clocks, have been running continuously for 60 million years with an accumulated error of less than one second [4] Group 2 - Any deviation in timekeeping can lead to significant consequences, such as power grid disruptions causing large-scale blackouts if the timing is off by milliseconds [5] - A time difference of one millisecond could result in changes worth billions in international stock market transactions [6] - A nanosecond discrepancy could affect the positioning accuracy of the BeiDou system by 30 centimeters [7]