Our Work. In this paper, we propose a novel Authenticated, Fault-tolerant Tree-based Xxxx-Xxxxxxx key agreement protocol, AFTD, based on two key ideas. First, as explained in Section 3, it is gross overkill to broadcast updated public keys to all group members for recomputing the group key when a node ni joins or leaves. It suffices to send each update to a much smaller subset of nodes in the tree, called its trust set TS(ni). Second, we achieve robust key authentication by distributing the function of trusted authority among the nodes in TS(ni), using a threshold cryptographic scheme. Any k members of a node’s trust set can serve as its public key certificate authority. Our performance analysis shows this scheme can reduces the communication overhead from O(n2) to O(n log n) for initialization, and from O(n log n) to O(n) for rekeying. It also reduces the storage requirement for blinded keys from O(n) to O(log n). This feature is particularly useful when a broadcast channel is unavailable. The rest of this paper is organized as follows. We survey related work in Section 2. Section 3 motivates our work and defines our intrusion model. We present our solution in Section 4 and demonstrate performance analysis and comparison in Section 5. Finally we make a conclusion in Section 6.
Our Work. 7.1 Our Work is for your exclusive use and must be used only by you and only for the purpose of this agreement.
Our Work. The focus of this research was to design a DTM that addressed the third and fourth criteria for robust IDCSs and could be seamlessly integrated with the existing architecture of S.A.F.E. This would complete the framework for S.A.F.E., making the S.A.F.E. framework the first we know that would address all four criteria required to build a robust IDCS. In order to do this, we felt it was critical that the DTM must be a distributed system, so there would be no single point of failure that could bring down the entire system. In order to make the DTM fault tolerant and able to withstand attacks, we examined how other fault tolerant systems had been built in the past, to learn what techniques could be used.
Our Work. In this paper, we propose a scalable, efficient, authen- ticated group key agreement scheme for multicast. Our scheme makes use of the bilinear pairings over the elliptic curves [4, 5, 6, 7, 9, 10, 18, 19, 22, 24] and is inspired on the work of XxXxxxxxx and Xxxxxxx [26]. Our scheme has advantages over the exiting schemes proposed for secure multicast. First, compared with the previously published tree-based schemes [20, 21, 29, 31, 33, 34], our scheme achieves group member authentication without imposing extra mechanism. Since we use an identity tree instead of key tree in our scheme. Each node in the identity tree is associated with an identity. The leaf node’s identity is corresponding to the user’s identity and the intermedi- ate node’s identity is generated by its children’s identity. Hence, in an identity tree, an intermediate node repre- sents a set users in the subtree rooted at this node. Next, our scheme solves the scalability problem in mul- ticast systems. Since we divide the large communication group into several smaller subgroups. Each subgroup is independently maintained by the subgroup controller
Our Work. 8.1 Because our Work is for your exclusive use, it must be used only by you and only for the purpose for which it was prepared.
Our Work a. The work provided by us or any other Network Firm in connection with the Services (the “Work”) is for your exclusive use and must be used by you only for the purposes described in the Letter (the “Purpose”). Unless we give our consent:
