Create an account
Your account is a single code. It is the only key that opens your files.
A random account code is made on this device. Save it, or download the recovery kit, before you continue.
Your browser makes the account code. The code itself is never sent to the NMTS server.
What reaches the server is not the code, but a different value computed from it that cannot be turned back.
NMTS publishes the source of the engine that does that computation. It is part of the source, not all of it.