In the science journal Physical Review Letters, we from the Austrian Academy of Sciences, the University of Vienna and the Chinese Academy of Sciences report on the quantum technologies published, what we call the first intercontinental QKD experiment. Using the Chinese research satellite "Micius" and ground stations in Austria and China, quantum keys were exchanged. Those keys were then used for the video conference, which was led via a conventional internet connection. Due to the laws of quantum physics, it was impossible for third parties to "hack" into the data exchange.

 

Reference:

1.) Sheng-Kai Liao, Wen-Qi Cai, Johannes Handsteiner, Bo Liu, Juan Yin, Liang Zhang, Dominik Rauch, Matthias Fink, Ji-Gang Ren, Wei-Yue Liu, Yang Li, Qi Shen, Yuan Cao, Feng-Zhi Li, Jian-Feng Wang, Yong-Mei Huang, Lei Deng, Tao Xi, Lu Ma, Tai Hu, Li Li, Nai-Le Liu, Franz Koidl, Peiyuan Wang, Yu-Ao Chen, Xiang-Bin Wang, Michael Steindorfer, Georg Kirchner, Chao-Yang Lu, Rong Shu, Rupert Ursin, Thomas Scheidl, Cheng-Zhi Peng, Jian-Yu Wang, Anton Zeilinger, and Jian-Wei Pan.
Physical Review Letters 120, 3, (2018)