Abstract

Wireless sensor network (WSN) consists of spatially distributed autonomous sensor nodes. WSNs are widely applicable in monitoring and control of environmental parameters such as temperatures, sound, pressure, etc. Sensor nodes cooperatively pass data among themselves in the network. Sometimes it is necessary to update data or program image through wireless links after they are deployed in order to adjust configuration parameters of sensors or distribute management commands and queries to the sensor nodes. In many applications these code updates need to be kept secret. Authentication and confidentiality play a very important role in providing secure code updates. Sometimes an adversary may transmit forged data, forcing nodes to waste their energy in identifying it as invalid. And also adversaries may sometimes repeatedly send invalid program image requests to its neighbours making them exhaust their energy. To avoid such attacks authentication of nodes need to be made and code updates need to be kept confidential.

Authors and Affiliations