Mobile Device Based Dynamic Key Management Protocols for Wireless Sensor Networks

Table 1

The time complexity of the proposed communication phase.

Scheme	Role	Time complexity
Communication phase; (base station and cluster node, as Figure 3)	Base station
	Cluster node
Communication phase; (mobile user, cluster node, and base station, as Figure 4)	Mobile user
	Cluster node
	Base station

Notes:
: the time complexity of using symmetric decryption algorithm;
: the time complexity of using symmetric encryption algorithm;
: the time taken to execute the hash function;
: the time for comparing operation.