METHOD FOR KEY PRE-DISTRIBUTION AND KEY ESTABLISHMENT IN A SENSOR NETWORK

摘要

A method for key pre-distribution and key establishment in a sensor network is characterized in that the method includes the following steps: 1) keys are pre-distributed, the step 1) includes: 1.1) a disposition server generates a key pool KP before a network disposition, the key pool KP comprises multiple keys and the key identifiers thereof, the key number in the key pool is denoted as ¦KP¦, and the disposition server is secure; 1.2) the degree d of a node is calculated,; 1.3) according to the degree d of the node and the number n' of the adjacent nodes of the node after the expected network disposition, the probability p of pairwise pre-shared keys between the adjacent nodes is calculated,; 1.4) the disposition server pre-distributes the keys for the node; 2) the keys are established, the step 2) includes: 2.1) establishing a key pair; 2.2) establishing a key group.