The QUESS -- standing for the Quantium Experiments at Space Scale -- is the first communication instrument ever placed in space that utilizes quantum cryptography. The device aims to provide communication between space and Earth by using quantum physics at a very basic level. The satellite contains a powerful crystal at its core that utilizes photons and polarization as the main source of functionality.
While quantum physics is still a topic of much ambiguity in terms of how it works and what it can be used for, the QUESS satellite hopes to open up the conversation and bring more science experimentation to understanding how the power of the science. The satellite is designed to provide top of the line digital communication that can greatly surpass any current system in place on Earth.