A Bilinear Pairing-Based Dynamic Key Management and Authentication for Wireless Sensor Networks

Table 3

The computation cost of the session key.

	IKDM [11]	TinyPBC [12]	KMTD [13]	Ours
Sensor node to sensor node	N/A		N/A	N/A
Cluster node to sensor node	N/A	N/A
Cluster node to cluster node		N/A	N/A
Cluster node to base station	N/A	N/A

: the time cost of a pairing operation.
: the time cost of an additive group .
: the time cost of a hash operation.
: the time cost of an encryption.
: the time cost of a decryption.
: the time cost of generating a nonce.
: the time cost of the polynomial function.
: the time cost of the combining key fragment degree.
: the time cost of the authentication.