Gopherfest 2017: Upspin (Rob Pike) - YouTube
Upspin architecture · Upspin
Upspin Overview · Upspin
"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.
Its target audience is personal users, families or groups of friends. Although it might have application in corporate environments, that is not its motivation.
Upspin provides a uniform naming mechanism for all data, along with easy-to-understand and easy-to-use secure sharing, as well as end-to-end encryption that guarantees privacy."
Every Upspin file name has the same basic structure. It begins with the user’s name—an email address—followed by a slash-separated Unix-like path name.
Upspin · Upspin
Google Online Security Blog: Another option for file sharing