[p2p-hackers] lockstep synchronization protocol problem

[coderman]

On 3/28/06, UE=x <jinz at mail.ustc.edu.cn> wrote:
> I'm doing research about synchronization problem in P2P system,and the basic
> synchronization protocol is the lockstep protocol,and it use rounds to synchronize
> all the peer's movements,the problem is lockstep only synchronize peer's
> movements?what about the event created by all the peers?can it use rounds to
> synchronize them?and how to ?

look at using a quorum based key distribution and agreement protocol
(where quorum == a specific subset of group key management) with
regular attestation / rekeying via trusted and strongly authenticated
mechanisms.  session timeout (for failure / lack of consensus /
malicious attack) should be detected within an appropriate time frame
for the user to respond securely.  (i tend to think 60 seconds is an
acceptable window)

doing this in a user friendly manner is very difficult and probably
the reason prior work in this domain is scarce.