Really cool idea.
Using this paper and the referenced one at http://arxiv.org/pdf/1009.3681.pdf%3Forigin%3Dpublication_de... I was able to make a proof-of-concept passive DHT crawler in a few hours.
Using this paper and the referenced one at http://arxiv.org/pdf/1009.3681.pdf%3Forigin%3Dpublication_de... I was able to make a proof-of-concept passive DHT crawler in a few hours.
You can do it yourself after reading the papers, though. I used node with the bittorrent-swarm, dht, ut_metadata and parse-torrent to build it.