On 03/04/2016 05:10 PM, Seth David Schoen wrote: > Scfith Rise up writes: > >> I'm pretty sure that the onion address is generated directly from the >> private key, at least if you have every played around with scallion or >> eschalot. So what you just wrote doesn't apply in that way. But again, I >> could be wrong. > > Mirimir's reference at > > https://trac.torproject.org/projects/tor/wiki/doc/HiddenServiceNames > > shows that they are truncated SHA-1 hashes, 80 bits in length, of "the > DER-encoded ASN.1 public key" of "an RSA-1024 keypair". > > So you have the space of public keys (indeed, it's considerably less than > 1024 bits if you want to actually be able to use it as a keypair) and the > space of 80-bit truncated hashes, and the former is dramatically larger > than the latter. So over the entire space of keys, collisions are not > just possible but are required and even extremely frequent. On the other > hand, they're so difficult to find that nobody knows a single example!
Right, _very_ difficult to find! But, let's say that one were found. Or occurred by chance. Am I correct that HSdirs would go with the server that had announced most recently? -- tor-talk mailing list - tor-talk@lists.torproject.org To unsubscribe or change other settings go to https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk
