In a book I am reading, a system called Freedom is mentioned as a means to protect user privacy. Though at some point it mentions that it uses multiple proxies, so even if a node behaves maliciously for the user the attack won't be successful.
From what I have read, Freedom only uses Anonymous Internet Proxies (AISs) so I guess it means them, but how is it possible for a beginning node to use multiple proxies (from what I have found till now Tor and other means use only one). Any ideas?
P.S I could not find freedom as a term so I could not add it in tags.