Identity Authentication Chain based on Encrypted Database in Heterogeneous Alliance Network

In this paper, a chain structure of identity authentication based on encrypted database in heterogeneous alliance network was constructed to implement the cross domain access. For preventing the member with lower level from reaching the member with higher level, two judgement nodes were designed in a whole chain. One is the node between III sub chain and II sub chain. The other one is between II sub chain and I sub chain. Moreover, the information of chains was saved in the encrypted database. These strategies could resist general network attacks. In addition, we design the protocols of identity association and cross domain access. The analysis of security can illustrate that the chain was feasible and protected.