China may have been tracking U.S. mobile phones via a Caribbean network
A mobile network security expert who analyzed sensitive signal data reports that 'China was using the Caribbean mobile network to track and monitor US mobile users.'
Revealed: China suspected of spying on Americans via Caribbean phone networks | US news | The Guardian
According to a research analysis by Gary Miller, who is familiar with mobile network security, China has exploited a vulnerability that has existed in mobile network for decades and targeted the telephone communication of American mobile phone users. It is possible that he was pursuing or intercepting through a person.
The vulnerability of this mobile phone network is summarized in the following article.
A dangerous vulnerability is discovered that can eavesdrop on mobile phone calls from anywhere in the world --GIGAZINE
by jm3 on Flickr
Miller, who has been observing traffic between mobile operators inside and outside the United States for many years, said, 'The Chinese government is using China Unicom, a state-owned telecommunications operator, to travel abroad to Americans. It is sending a 'signal' to the mobile phone. '
The 'signal' pointed out by Mr. Miller is a command sent by a telecommunications carrier through a global network without being noticed by users. Originally, it is for checking the position of mobile phones, connecting mobile phones, and assessing roaming charges, but if this signal is abused, it will be fraudulent, such as tracking, monitoring, and receiving on behalf of communications. It can also be used for access.
'China is using this'signal'to conduct surveillance attacks from 2018 to 2020, which could affect tens of thousands of U.S. mobile phone users,' Miller speculates. I will.
Furthermore, Mr. Miller, China Unicom of monitoring attacks, the Caribbean of small national and
According to Miller, most of the surveillance attacks received via the 3G network in 2019 were via Barbados, and at the same time, the amount of messages from China to the United States was significantly reduced. 'China began to reduce its attack volume and engage in more targeted espionage in 2019, while it is more likely to use its network of Caribbean countries as a stepping stone to attack,' Miller said. I will. '
China Unicom told The Guardian, a major British newspaper, 'We have achieved sufficient compliance and intend to cooperate with US law enforcement agencies. China Unicom's American subsidiary I have never been accused of illegal activity or investigated by law enforcement agencies, 'he strongly denied Miller's allegations.
A spokeswoman for the Chinese Embassy said, 'The Chinese government's position on cybersecurity is consistent and clear. We firmly oppose and fight cyberattacks of all kinds. China is cybersecurity. I will firmly protect it, 'he commented, denying the suspicion.
In addition, when The Guardian asked for comments from carriers in Barbados and the Caribbean, it seems that the answer was refused.
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