Vol. 2, Issue 8 (2015)
Secured Multicasting Technique Using Enhanced Mabs
Author(s): P Prabhakaran, S Nandhini
Abstract: Multicast is an efficient method to deliver data from a sender to a group of receivers. Authentication is an important issue in multicast communication. Conventional block-based multicast authentication schemes overlook the heterogeneity of receivers by letting the sender choose the block size, divide a multicast stream into blocks, associate each block with a signature, and spread the effect of the signature across all the packets. The approach of signing and verifying each packet independently raises a serious challenge to resource-constrained devices. In mobile environments, the situation is even worse. The instability of wireless channel can cause packet loss very frequently. The smaller data rate of wireless channel increases the congestion possibility. The congestion will lead to packet loss.MABS-B (Multicast Authentication based on Batch Signature) can be used to improve the performance of multicast authentication which supports the authentication of any number of packets simultaneously with one signature verification, to address the efficiency and packet loss problems. The basic scheme eliminates the correlation among packets and thus provides the perfect resilience to packet loss, and it is also efficient in terms of latency, computation and communication overhead. The enhanced scheme combines MABS-B with packet filtering to alleviate the DoS impact in hostile environments. The existing technique MABS provides data integrity, origin authentication, and non-repudiation as previous asymmetric key based protocols. In addition, our proposed technique MABS-B can achieve perfect resilience to packet loss in lossy channels in the sense that no matter how many packets are lost the already-received packets can still be authenticated by receivers.