Mobile node authentication protocol for crossing cluster in heterogeneous wireless sensor network

The introduction of mobile node brings new security problems and challenges to Heterogeneous Wireless Sensor Network(HWSN), that is how to ensure the credibility, security and low consumption of mobile node in the entire network. In this paper, we design a highly efficient re-authentication protocol for mobile node (MRAP) in HWSN, which makes two communicating parties achieve identity authentication and establish a new pairwise key. We analyze our re-authentication according to the theory. The result shows that our authentication protocol does not affect HWSN performance basically, besides it can provide better security with reducing communication overhead, computation cost and storage space than previous protocols.