382 ◾ Security for Multihop Wireless Networks
isolate the malicious nodes to preserve the operation of the network and services. In
some cases, the reaction schemes are aimed at serving as a feedback mechanism to
strengthen the network by adapting the considered security mechanisms to the par-
ticular conditions observed, as shown in Figure 14.1. After that, Section 14.5 brings
new trends and open challenges in the topic of multihop ad hoc security in general,
and for packet-dropping attacks in particular. Finally, the chapter concludes with a
summary of the main aspects contributed.
14.2 Preventing Packet-Dropping-Related Attacks
A first concern quickly arises regarding the prevention of packet-dropping attacks
when reviewing the literatu