dawuud <daw...@riseup.net> writes: >> 2. Why is a PKI necessary? On a quick read, Loopix paper doesn't seem to >> mention this. You have a brief justification in pki.txt but the text does >> not make complete sense to me: "it gives each client the same view of the >> network, it links mix IDs to public routing keys." >> >> - If by "same view" you mean "same view of crypto identities" then this >> suggests the network can't scale, as I was worried about above. >> - If by "same view" you mean "same view of online/offline nodes" I think >> this is impossible to achieve due to well, networks being unreliable. >> >> If mix IDs are simply the public routing keys themselves, does that avoid >> the need for a PKI? I suppose you still need to map public keys to physical >> addresses, but there's probably an existing system you could re-use for that >> purpose. > > Yes you are right to point out the vagueness in the PKI spec draft I > sent you. Mixnets like Tor require a PKI that clients can query to > gain a view of the network so that path selection is possible. Like > Tor's Directory Authority system we need to store various bits of > information about each mix in say, a "mix descriptor". > > By "same view" I mean each client (just like in Tor) should receive > the same network consensus document. The client uses this for path > selection. >
Might be worth mentioning here that Tor's design does not actually ensure that "each client should receive the same network consensus document". There are multiple valid consensus documents at every point in time, and each client should have a valid one, but that doesn't mean they all have the same one. The Tor network makes a consensus document every 60 minutes, and clients are not instructed to immediately fetch it because that would cause a "thundering herd" problem. So each client has its own consensus download schedule, which means that different clients will have different consensuses. Not sure if that invalidates any loopix assumptions but thought it might be worth mentioning it. _______________________________________________ Messaging mailing list Messaging@moderncrypto.org https://moderncrypto.org/mailman/listinfo/messaging
