Patent ID: 8705744
Filing Date: 2014-04-22
Classification: H04L,H04W

Abstract:
1. A system for distributing keying material to nodes in a wireless sensor network (WSN), including: a key management box (KMB) that stores keying material for at least one sensor node in the WSN; and a security module, in the KMB, that encrypts keying material for transmission to the at least one sensor node; wherein the KMB transmits the encrypted keying material to the at least one sensor node and receives an acknowledgment of receipt of the keying material from the sensor node; wherein upon activation of the KMB, a status of the at least one sensor node is indicated to be expired in a look-up table stored in the KMB; and wherein upon receipt of the acknowledgment at the KMB, the lookup table is updated so that the status of the at least one sensor node is indicated to be current.