  This paper introduces the Beta distribution as a novel technique to weight
direct and indirect trust and assessing the risk in wireless sensor networks.
This paper also reviews the trust factors, which play a major role in building
trust in wireless sensor networks and explains the dynamic aspects of trust.
This is an extension of a previous work done by the authors using a new
approach to assess risk. Simulation results related to the previous work and to
the new approach introduced in this paper are also presented for easy
comparison.
