On 3/28/06, UE=x <jinz@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.