A Weakly Secure Network Coding against Wiretap Attack
Wu Men · Computer Technology and Development · 2014
Network coding can achieve the theoretical multicast capacity of a network,and it is an important breakthrough in communication field. The security is an important issue when network coding is used in practical network. In this paper,provide a VSWNC algorithm,which is weakly secure network coding algorithm against wiretap attack. Firstly,in VSWNC algorithm the source and the destination share a random number generator. Secondly,in source node,a Vandermonde determinant P is generated using random number r in the random number generator and source message can be pre-coded using matrix P. Finally,user node can decode correctly using matrix P achieving from r. Using VSWNC in random network coding,can achieve the weakly secure condition at probability of one with sacrificing a small amount of capacity.