Security and privacy aspects in wireless and mobile networks

The goal of ubiquitous computing is to integrate communication into our physical environments. Wireless and mobile networks play an important role in realizing the vision of ubiquitous computing. We address three types of wireless and mobile networks: cellular, mobile ad hoc (MANETs), and wireless sensor networks.;We analyze the effectiveness of an adversary with probabilistic approaches and demonstrate that the proposed solutions mitigate the effectiveness of the adversary. We also explore communication and computation costs via thorough implementation and simulations of solution systems. We show that it is possible to effectively trade-off security level with performance.;Wireless links have high packet loss rates and delay variation which affect the end-to-end performance. User devices (or nodes) have power constraints, low computational capability, and small memory space. In wireless and mobile networks, performance and resource-aware communication has received significant research attention. As mobile and wireless network services become more ubiquitous, security and privacy manifest into major concerns. Security and privacy services require additional computation and communication overhead. Due to resource limitations, it is a challenge to provide security and privacy services in wireless and mobile networks. We address security and privacy aspects in these environments, inspecting trade-offs between communication and computation costs and security services.