Intrusion Detection Algorithm Based on Change Rates of Multiple Attributes for WSN

Table 1

Symbol representations.

Symbol	Representation
	The th attribute of sensor node of WSN. The total number of multiple attributes is .
	The value of th attribute of th sensor node at moment . The total number of nodes is .
	The value of th attribute of th node at moment . The is previous adjacent time of . The total number of nodes is .
	The “Observed Change Rate” of th attribute of th node between time and .
	The “Normal Change Rate” of th attribute of th node in the period of interval time . The and are not adjacent times.
	A set of . At every interval time , the attribute vector comprises a fixed number of Normal Change Rates of all attributes .
	The parameter is the weight of th node at time .
	The weights of th node in the period of . .
-value	The difference value of the two adjacent iterations.
	The weight of th dimension attribute of th node at moment .