Security for Multihop Wireless Networks

Taxonomy of Security Protocols  ◾  335

12.4.1 The TinyPK Protocol

e objective of the TinyPK protocol [14] is to provide the necessary functional-

ities so that a sensor network and any other third entity can mutually authenticate

and securely transfer the sensor network’s session key to the external party. is

key can then be used to protect the traffic exchanged between the sensor network

and the external entity. erefore, TinyPK assumes that all the members of the

sensor network share a session key that identifies them as legitimate members of

the network and that is used to protect the traffic exchanged within the sensor

network.

For its operation, TinyPK requires the introduction in the sensor network of a

certification authority (CA), which is ...