Utilization of quantum cryptography satellite communication for long-distance power grid management in China

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Technology to block the source of risk such as hacking… Response to Power Grid Blocking Threats

[서울=뉴시스] A conceptual diagram of the principle of the gravitational field acting on the polarization of photons used for quantum communication between terrestrial base stations and artificial satellites (source = provided by Seoul National University) *Resale and DB prohibited


[서울=뉴시스] Reporter Youngjin Kang = It is much larger than the US, India, Russia, and Japan, and it is inevitable to manage the power grid with an automated system using a computer, with integrated means of unstable power supply such as solar and wind power generation.

However, power grid management using computers carries the risk of serious disasters due to hacking or human error, and Chinese scientists have solved this problem using quantum cryptography, Aroged, a computer technology specialist, reported on the 11th (local time) reported

China launched a satellite to test quantum cryptography security technology in 2016, and the satellite is expected to be a reliable communication network that uses quantum array technology to transmit cryptographic keys over long distances. It is a technology that significantly reduces costs compared to installing an optical communication network that transmits quantum cryptography. Although satellite communication has problems such as clouds, solar wind and lack of communication lines, there is virtually no alternative other than satellite communication as a means for encrypted transmission.

The satellite transmits the key encrypted with the quantum of a single photon. When someone intercepts the photon encryption key, it immediately changes the state of the photon, signaling that it has been detected. Then, the key is immediately invalidated, and the process of generating and transmitting a new encryption key is repeated until successful.

By effectively blocking hacking in this way, you can safely control the power grid.

Last spring, China conducted a test that would detect communications between the grid headquarters in Beijing and the power grid in southeastern China’s Fuzhou province. Fuzhou Province is close to Taiwan, so there is a high risk of being attacked in case of an emergency and the power grid is also at risk of collapse. Quantum communication satellite communication will be able to solve this problem by protecting communication between the central and local areas.

In addition to quantum encryption communication through satellites, China is also applying quantum encryption technology to communication through terrestrial optical cables.

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