The Chinese satellite Micius has carried out successful encryption and transmission of a video call between Vienna and Beijing using quantum entanglement . Prior to the call , quantum packets of entangled messages generated onboard Micius were sent down to both ground stations separately , where they were used to generate unique cryptographic messages . The keys were then sent back up to Micius and combined into a new , shared encryption that could be used to encrypt and transmit the video . The achievement is being hailed as the first step towards a global quantum internet , which would theoretically be completely secure .
The Chinese satellite Micius has carried out successful encryption and transmission of a video call between Vienna and Beijing using quantum entanglement. Prior to the call, quantum states of entangled photons generated onboard Micius were sent down to both ground stations separately, where they were used to generate unique cryptographic keys. The keys were then sent back up to Micius and combined into a new, shared key that could be used to encrypt and decrypt the video. The achievement is being hailed as the first step towards a global quantum internet, which would theoretically be completely secure.