Encryption Data in Wireless Sensor Network

In a paper written by Casteluccia C., Mykletun E. and Tsednik G., an efficient approach is presented for utilizing the aggregation of data in a Wireless Sensor Network and the assuring of end-to-end encryption of data between the leaves and sink. One of the goals of the paper was to minimize the bit transmission between the sensor nodes and therefore to find an efficient encryption algorithm which is simple to implement and in turn would prolong the life of batteries.