Researchers have developed a simple and stable device to generate the quantum states necessary for quantum key distribution. The device could make it more practical to develop a global data network that uses this very secure method of encryption to protect everything from credit card transactions to texts.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2018/quantum.jpg)
Source:
https://phys.org/news/2019-05-all-fiber-device-free-space-based-quantum.html