The "unsalted" QKD method was also broken: One team Swedish scientists have discovered a way to break quantum cryptography, a new, advanced concept for encrypting data using a law of physics.
Quantum cryptography referred to 1970 as an advanced cryptography model based on photon motions for secure data transmission.
For many years, theorists have argued that the method is "ruthless", and will not allow others to track traffic encrypted by the quantum key distribution (QKD) method.
Some companies even started to develop QKD applications that could be commercially available. But to date, they have only been used in test environments.
According to researchers from University of Linköping and Stockholm University, there is a gap in quantum cryptography. The way modeof the energy-time entanglement parameters on which the devices are based puts QKD at risk.
“With this security loophole, it is possible to track with her movement without being detected. "We discovered the security gap with our theoretical calculations, and our colleagues in Stockholm were able to prove it experimentally," says one of the researchers, in the scientific journal EurekAlert.
In quantum cryptography, both parties send a photon at exactly the same time, but there is also a slight phase shift on each side. If there is someone who wants to eavesdrop, it creates noise in the channel communication, and the phase shift is smaller. If there is no risk, the photons use the phase shift itself as an encryption key.
In their tests, researchers found that the integrity of the data can only be ensured if both parties communicate with each other using photons rather than traditional light sources.
Scientists have published their findings with a great deal of detail online on the free ScienceMag portal, along with two mitigation techniques that can be used to avoid data destruction.
