https://codesmithdev.com/openssh-8-0-releasing-with-quantum-computing-resistant-keys/
There is a two page summary of this by a working group here: https://www.quintessencelabs.com/wp-content/uploads/2015/08/CSA-What-is-Quantum-Key-Distribution-QKD-1.pdf
I don’t really grok quantum computing or encryption at all.
But it certainly sounds cyberpunk as hell. I also do grok a little of the broad stokes of the challenges quantum computing poses to traditional cryptography and its pretty groovy that we’re rising to meet them.