Its a good idea, but I think we need to put these ideas on the TODO list for after 0.7.0.
Ian. On 1/3/06, Matthew Toseland <toad at amphibian.dyndns.org> wrote: > Freenet is designed to be a meritocracy for content. If somebody inserts > several gigabytes of pictures of mating chickens, for instance, this > will only persist if it is popular, or so the theory goes. This > meritocracy is one of the main principles underlying the moral, > philosophical and practical aspects of Freenet. > > The only problem is this: If an attacker can continue to insert a file, > he can keep it in the network forever. Inserts don't stop when they find > the data (for good reasons IMHO), so this is more effective than > requesting the data. And he doesn't have to push the same data, he can > just keep inserting random data chunks. He doesn't need to find lots of > nodes to connect to. These will then be promoted to the top of the LRU > list, and therefore will push out moderately popular content - or even > popular content, if he has many links to many nodes and lots of upstream > bandwidth. > > Solution? > All we have to do is not promote inserted content to the TOP of the LRU > list. Set it say 3 days ahead of the MRU. This can be done efficiently > with the new database-backed datastore. Then when it is requested, > promote it to the top. If it isn't requested, for example if it is > random junk inserted by Mallory, it will expire in 3 days. We could make > it 7 days, or some fraction of the overall most-recent to least-recent > period (check your Environment page, Data Store box; most nodes have at > least a month between most recent and least recent access time). > > This should make flooding attacks considerably harder, and move freenet > somewhat closer to the meritocratic ideal we claim. > -- > Matthew J Toseland - toad at amphibian.dyndns.org > Freenet Project Official Codemonkey - http://freenetproject.org/ > ICTHUS - Nothing is impossible. Our Boss says so. > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (GNU/Linux) > > iD8DBQFDurnNHzsuOmVUoi0RAiLIAJ44TGLQozq6RDi4zswMV9OnfdypqQCfYURA > vteo3spHLTfiFFRh82l03S4= > =00Cd > -----END PGP SIGNATURE----- > > > _______________________________________________ > Tech mailing list > Tech at freenetproject.org > http://emu.freenetproject.org/cgi-bin/mailman/listinfo/tech > >
