China launches new satellite in ‘important step’ towards global quantum communications network
- Jinan 1 will conduct key distribution experiments in lower-Earth orbit after a month of testing
- More launches planned for near future to support quantum communication for over 100 users
China launched a new quantum satellite on Wednesday that could be a first step towards establishing an ultra-secure communications network with global coverage.
It was one of six satellites launched around noon by the Lijian quick response rocket from the Jiuquan Satellite Launch Centre in the Gobi Desert, according to Xinhua.
The quantum satellite, developed by the Chinese Academy of Sciences, would conduct quantum key distribution experiments in lower-Earth orbit, the report said.
A quantum key network uses entangled particles to encrypt a message. Any attempt to steal or decode will alter the message physically and alert the receiver, thanks to the law of quantum physics.
It is the second quantum satellite launched by China after it sent the world’s first such satellite, Mozi, into orbit in August 2016.
Called Jinan 1, it weighs less than 100kg – about a sixth of the weight of Mozi – but can generate quantum keys at speeds two or three magnitude higher, the project team said in a statement posted on WeChat.