Hi, I co-wrote this paper. Did not expect to see renewed interest!
FWIW, ClearView, the crawler used in the paper, almost certainly would not work unmodified today. The Vuze folks implemented Sybil attack defenses after our predecessor to this paper, "Defeating Vanish with low-cost Sybil attacks against large DHTs", was released. You can now only insert a finite number of nodes into the DHT per /24 you have (and a couple other flavors of subnet as well, probably /16 but I haven't checked the Vuze code in years). The last time I looked, IPv6 Sybils were still a possibility because it was unclear how much of the IPv6 space everyone would get.
FWIW, ClearView, the crawler used in the paper, almost certainly would not work unmodified today. The Vuze folks implemented Sybil attack defenses after our predecessor to this paper, "Defeating Vanish with low-cost Sybil attacks against large DHTs", was released. You can now only insert a finite number of nodes into the DHT per /24 you have (and a couple other flavors of subnet as well, probably /16 but I haven't checked the Vuze code in years). The last time I looked, IPv6 Sybils were still a possibility because it was unclear how much of the IPv6 space everyone would get.