[themenace]

While this is good science and I enjoy hearing about it, it needs to be said that "unbreakable" encryption is a solved problem.

The existing public key plus symmetric key infrastructure, with a sufficiently long key, achieves "unbreakable" encryption for any practical purpose, including communications that are a matter of life & death and national security.

There are many ways to compromise existing crypto through implementation errors, bugs, or bad key management, but the same caveat would apply to quantum crypto or this new thermodynamic crypto.

The main unsolved practical problem in crypto is getting it built into every form of communication to happen automatically and transparently. And that would happen if people demanded it. So the main problem is a social one: getting people to care about privacy and secrecy enough that they demand it.