Guard nodes make it so only a certain number of certain types of nodes are visible to any client. By controlling a huge number of clients, you are able to enum

Guard nodes make it so only a certain number of certain types of nodes are visible to any client. By controlling a huge number of clients, you are able to enumerate them much more easily. https://lists.torproject.org/pipermail/tor-dev/2011-October/002986.html https://lists.torproject.org/pipermail/tor-dev/2011-October/...