For those unfamiliar with Upspin (as I was):
"Upspin provides a global name space to name all your files. Given an Upspin name, a file can be shared securely, copied efficiently without “download” and “upload”, and accessed from anywhere that has a network connection."
<a href="https://upspin.io/doc/overview.md" rel="nofollow">https://upspin.io/doc/overview.md</a>