Common use of Partition Protocol Clause in Contracts

Partition Protocol. To provide key independence, one of the remaining members needs to change its key share. For this reason, in the first round of the partition protocol, we require the shallowest rightmost sponsor to generate a new key share. Figure 7 shows an example where all remaining members delete all nodes of leaving members and compute keys and bkeys in the first round. In the figure on the right, any of or ( or ) cannot compute the new group key, since they lack the bkey ( ), respectively. However, broadcasts in the first round, and can thus compute the group key. Finally, every member knows all bkeys and can compute the group key. As discussed above, before computing , changes its share . <0,0> <0,0> <1,0> <1,1> <1,0> <1,1> <2,0> M3 <2,2> <2,3> M4 <2,0> <2,1> <2,2> <2,3> M2 M3 M5 M6 Sponsor Sponsor <3,6> <3,7> <3,6> <3,7> M1 M2 M5 M6 Sponsor Sponsor