Yes, that is all powered using Lighttpd. The typical format is /dl/, but it can be whatever you configure. The portions of the URL that look like directories are actually not directories at all. Rather, they are keys. They basically tell lighttpd how to deliver the content. If your key generator is rather complex, it is actually quite a good method of preventing hotlinking. I actually run a hybrid site (lighttpd and Apache) and have built modules for people who wish to use the enhanced security. The problem is, however, is that it typically requires a dedicated box or a VPS/VDS as many providers are not utilizing lighttpd on the client level. Even further, I'm not too sure how the new version of vShare implements this (not sure if they are requiring all lighttpd or a hybrid like with what I do). In any case, I'll probably continue to run a hybrid as there are some things that I plan to add into 2.7 to make it a lot more streamlined, now that it is open source.