A study by Griffith University in Queensland, Australia, may significantly improve the security of Internet information transmission. The physicist at the Center for Quantum Dynamics Research published a related paper online in the journal Nature Communication. Studies have shown that "quantum manipulation" can potentially improve the transmission security of long-distance data, prevent hackers and eavesdroppers from invading, and solve the trust problem with a communication device.
"Quantum physics provides the possibility of absolute security of information transmission. Personal credit card details or other personal data transmitted over the Internet can completely block hackers," said project leader Geoff Reddy.
In the ideal world, the safe and perfect data transmission over long distances between any two points is very simple. They can create truly random and unbreakable code by sharing quantum systems that are strongly entangled, such as photons. Unfortunately, in the real world, due to the loss of transmission and detection, the two sides cannot share a sufficiently strong entangled state over long distances. Because some photons transmitted through the communication network are lost, the vulnerable code is vulnerable to external attacks.
An alternative solution is quantum manipulation, where one party controls the quantum system changes and the other can control the system. This is the focus of new research.
Professor Reddy said that quantum manipulation, as a weak form of entangled state, maintains communication security through self-contradictory operations when it suffers from more losses in the real world.
The Heisenberg Uncertainty Principle describes a state in which the position and velocity of a microscopic particle can never be confirmed. According to this principle, even if a hacker invades a device, the quantum state cannot be determined. That is, it means quantum. The status can still be used safely.
According to reports, the Griffith University project team used a measurement device that was executed by a special photon state and could be run at every step of the code.
In the experimental demonstration, the measuring device proved that both sides of the information transmission can create and receive entangled photons from the photon source. Another photon source that acts as a "referee" is used to prepare the quantum state. After most photons start running, the "referee" will run a mathematical test using the measurements obtained from both parties. The research team proved that the optical quantum energy acting as the “referee†matches the test results, and thus generates a strong entangled state in the measurement equipment that does not need to set the trust protocol.
Professor Reddy said: "Our new technology does not require a trust protocol between communication devices to ensure communication security with quantum entanglement and performs well in long-distance work scenarios where standard methods are prone to failure."
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