Security for Multihop Wireless Networks

116  ◾  Security for Multihop Wireless Networks

in Figure 5.5b. When the EM

3

A has been activated, the delay increases by d1.1%

and d2.5% in each scenario. Consequently, the low computation overhead of

the symmetric key encryption/decryption operations makes the authentication

process a lightweight mechanism for securely using multihop communications

in PMIP domains.

Figure 5.6 illustrates the performance of the network in terms of packet losses

for real time (audio and video) and best effort traffic. In general, the use of the

authentication scheme does not present a major impact compared to the nonsecure

multihop PMIP. In the most demanding scen ...