-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Trevor Perrin wrote: > On Mon, Dec 7, 2015 at 7:59 PM, Jeff Burdges <[email protected]> > wrote: >> Tor has avoided these attacks in their hidden service redesign >> specification, but they do so by asking the directory >> authorities to generate a random number collaboratively using >> commit and reveal. > > The Tor HSdir mechanism is solving a different problem - it makes > it hard to become a DHT node that will store certain entries.
This is something that I am also interested in, from the perspective of I2P's netDb. Entries are currently stored at location H(H(entry) + yyyyMMdd), which was chosen back in 2003/4 to try and raise the barrier to partial-keyspace attacks. Recent research shows it isn't very effective, and thus I2P would benefit from a common non-predictable random seed, like Tor's HS 2.0. > > I don't know how much you care about that. I also don't know how > feasible it is for users to frequently re-publish all their > petnames, under different randomization. > > But there's certainly literature on randomness beacons and > commitment schemes for this - the "random zoo" paper has some nice > discussion, for example: > > https://eprint.iacr.org/2015/366.pdf Yay, papers! str4d -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJWaBS4AAoJEBO17ljAn7PgI+kP/3d3IJEnbHJwkBI+06Ft2tU+ cq81R6T2c3FeWB9XIrGweO/fbfma4sko7TqIlpuH7/w6fiZdQoY48UqMGV9BJM7x C2TS+v/a2cXHhqq0MsA0E+BXjm7Fsz3p66pMp5zDBLmqInbkVmk9A2kZw6R/ac9R ghuYmoMkXwDrprrHxhfY1dXX7YTD26fDe9KLTDwsLK5bNSC3UsCzM2f5TO+RQgsZ EY/GtjpAblv0+hsrsBC26Vwb/FeSF0E5mjrYnOREk0GayZ9gzRbj5fZA3Yx8vNgf tvirt09htJRVvPCE7LZc1QySgltWxphyrOHqMQNh7ZoSmC+NxyY/41nyooY3Jzyi 01Y5M2ox7UR7USnUS26btERQgDC5BpWXSLQeOO8CeFHvNy8QL2V6qUeSxNSOuPVo cVAEeK+YIsEh3AvyJLrImzVvd4deE9F/E7IpcQwgV48PIfLxV0/299utpRuv6jhE LsjEWjau5EM4Z+hLwwrYmG0/FNDVEAkBXBLs0YjQN0BBsU2dh2xgHHxTybkRsYts hhj+MM4Th7nP6bvYPOjCRrMADEaK1hDGshfK0rRs3jKMWCDIrqZKpArSstrWAmVO VIx3U4CjTd9th4DQWz2IYZ65c/oFA7wYvPrW79E615cZ4v36wg4p6QdUlYEKtLYO b7hB0GOzCskbVrrSTCKK =1H6i -----END PGP SIGNATURE----- _______________________________________________ Messaging mailing list [email protected] https://moderncrypto.org/mailman/listinfo/messaging
