where is Rise 360 content stored

I am curious where Rise 360 content is stored and accessed from.  Is it all online, on an Articulate server?   I know with Storyline, you save all the files locally and they can be accessed through a personal LMS.   I am wondering about the security of the Rise 360 courses and confidential information being out on a cloud based server.  Please let me know how those files are kept secure.  thank you!!