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Table 3 Root-key distribution steps and their time/energy usage.

From: Broadcast Secrecy via Key-Chain-Based Encryption in Single-Hop Wireless Sensor Networks

Task

Time (sec)

Energy (J)

Creation of ECC keys

53.2

3.25

Verification of digital signature

59.8

5.54

Creation of digitally signed message

35.7

3.58

Sending message to base-station

3.7

0.38

Waiting period

1.3

0.12

Diffie-Hellman key exchange

5.5

0.57

Decryption of root-key

9.7

0.79

Sending message to base-station

3.6

0.33

Total

172.5

14.56