A Study on Integration of Trust Management and Application Placement in Fog Computing

Fog computing enables placement of applications on fog nodes present in the proximity of Internet of Things (IoT) users, leading to improved performance such as fast response time, low bandwidth consumption, low power consumption, etc. Thus, IoT users experienced enhanced satisfaction. Quality of Experience (QoE) is a well-known metric used to meter the user satisfaction level and can be enhanced with improvement in the performance of IoT applications. However, application placement in presence of malicious fog environment can lead to numerous harmful effects such as inaccurate placement results, reduced user satisfaction, and increased user relinquish rate. Thus, we integrate a trust management framework in QoE-aware application placement framework to study the effect of trust in reducing the harmful effects created in malicious environment. The trust management framework evaluates and manages the trust of fog nodes and consider them with other QoE-dependent metrics to make placement decisions. Simulation results show that our proposed placement mechanism performs satisfactorily in malicious fog environments.