With the rapid expansion of wireless networks and mobile computing applications, the quality of service (QoS) of mobile ad hoc networks (MANETs) has received increasing attention. Security is an important aspect of providing QoS in a MANET environment. Without the protection of a security mechanism, attacks on a QoS distortion system can lead to poor QoS performance, interference of resource consumption, or even failure of QoS provisioning. Due to the characteristics of MANET, such as diversity of static topology and limited computational and communication power, traditional security measures cannot be used, and new security technologies are inevitable.