Researchers at the Chinese University of Science and Technology (KNTU) were the first in the world to test quantum safe time transfer technologies.
This was reported by Xinhua.
“With the help of the Mo Tzu satellite, Chinese researchers were the first to test for quantum safe transmission in the world,” the statement said.
According to the agency, high-precision time synchronization for clocks located in remote areas plays an important role in basic science and real-world applications, including navigation and positioning.
However, modern methods of time synchronization are unsafe for experienced opponents.
To solve the problem, KNTU professor and colleagues proposed a satellite scheme of quantum safe time transmission.
The cloning prohibition theorem states that it is impossible to make a uniform copy of an arbitrary unknown quantum state.
In this scheme, a single photon is used as a carrier to transmit time and generate encryption keys, providing increased security for transmitting time signals and time information.
Scientists using single-photon-level signals demonstrated synchronization between the satellite and the Earth. The accuracy of time signal transmission exceeded 30 picoseconds.
It has been reported that “Mo-Tzu” or Quess (quantum experiment on space scale) – the world’s first quantum communication satellite, was launched on August 16, 2016, in the orbit of Earth.