in Sensor Networks: An Empirical Outlook

Network-reprogramming is a valuable service for maintaining sen-sor networks. Network-reprogramming services need to be not only efficient and reliable, but secure as well. A number of strategies for providing authentication and integrity have been proposed and eval-uated, but the tradeoff space has yet to be explored to any signifi-cant depth. The recently proposed strategies are mainly distinguished through their structure, granularity and strength of hashing. We pro-pose a configurable, secure data dissemination scheme that uses a dif-ferent hash-structure to allow for a high degree of flexibility in choosing from a full spectrum of hash granularities and strengths. Using this structure, we are able to experimentally explore the tradeoffs inher-ent in choosing a hash-granularity under different attack scenarios and densities.