A Novel Homomorphic Against Intersession Coding attacks Using InterMac

Network coding allows intermediate nodes to encode data packets, which increases network throughput and enhances robustness. However, once the node injects corrupted data blocks into a network, the polluted data blocks will propagate quickly with network coding. In the existing approach a new homomorphic MAC scheme called SpaceMac, which makes it possible for an intermediate node validating whether received packets remain in a selected subspace, even when the subspace is expanding eventually. Then, by using SpaceMac to be the building block to develop a cooperative scheme that gives complete defense against pollution attacks: (i) it might detect polluted packets early at intermediate nodes, and (ii) it could know the exact location of every, even colluding, attackers, thereby making it a possibility to eliminate them. This system fails to detects the malicious attacks in inter-session attacks of souce packets. In this proposed work, we'll first define precisely damaged packets in inter-session pollution based on the commitment of a given source packets. Within this system a new detection scheme: one hash-based and other MAC-based schemes i.e(Improved InterMac and SpaceMac). InterMac is the first multisource homomorphic HMAC scheme that supports multiple keys. All schemes provide in-network detection, are collusion-resistant, and have very low online bandwidth and computation overhead.