Sensor networks are often used to monitor sensitive information from the environment or
track sensitive objects' movements. Anonymity has become an important problem in sensor
networks, and has been widely researched in wireless ad hoc and wired networks. The
limited capacity and resources of current sensor networks have brought new challenges to
anonymity research. In this paper, two efficient methods are proposed based on using a one-
way hash chain to dynamically change the identity of sensor nodes in order to provide�…

Securing wireless sensor networks against denial of service attacks that disrupt
communications or target nodes serving key roles in the network, eg sinks or routers, is
instrumental to network availability and performance. Particularly vulnerable to these attacks
are the components of any communications or operation infrastructure in the network. In this
paper, we address a class of wireless sensor networks where network protocols leverage a
dynamic general-purpose virtual infrastructure; the core components of that infrastructure�…