SSH3 seems a bit of a clickbait project name, it's not clear to me that this project uses anything protocol-wise from SSH though it offers similar functionality

SSH3 seems a bit of a clickbait project name, it's not clear to me that this project uses anything protocol-wise from SSH though it offers similar functionality. A PhD project from Belgium that combines several Golang libraries to offer HTTP-based authentication on top of backwards compatibility with OpenSSH keys, configuration, agents, etc. -- it looks pretty solid but the associated paper titled "Towards SSH3" acknowledges "This article is a first step" in the conclusion.