Patent ID: 8189791
Filing Date: 2012-05-29
Classification: H04L,H04W

Abstract:
1. A security system for a hierarchical network including at least two hierarchical levels each corresponding to a security domain, comprising: a plurality of local network nodes; a keying material generator which generates correlated sets of keying material for each network node, which each keying material set includes keying material sub-sets, each sub-set corresponding to an associated security domain including a hospital level security domain associated with a hospital and a department level security domain associated with each of a plurality of departments within the hospital; and a set up server which distributes the generated keying material sets to each network node to enable the network nodes within each department to communicate with one another at the associated department security domain using a first corresponding sub-set of keying material and to communicate with network nodes in another department at the hospital level security domain using a second corresponding sub-set of the keying material.