Increasing Attack Resiliency of Wireless Ad Hoc and Sensor Networks 

Harald Vogt ETH Zurich Department of Computer Science 

Abstract 

An ad hoc or sensor network that is employed for security sensitive 
applications is expected to tolerate a certain quantity of maliciously 
behaving nodes. Algorithms must be designed in a way to withstand attacks such 
as manipulation and injection of messages. End-to-end security mechanisms, 
albeit desirable, are generally too costly with regard to the limited 
computational resources available in sensor networks. We propose and evaluate 
a robust, scalable scheme for interleaved message authentication, which 
approximates security guarantees of end-to-end schemes.