Date Added: Sep 2011
This paper focuses on the resiliency of wireless sensor network routing protocols against selective forwarding attacks by compromised nodes. Informally, resiliency should be understood as the capacity of the routing protocol to endure and mitigate the presence of a certain number of compromised nodes seeking to disturb the routing process. To provide for security when nodes may be compromised, cryptographic solutions must be completed by algorithmic solutions considering "Beyond cryptography" approaches. In this paper, after discussing the shortcomings of existing routing protocols against packet-dropping malicious nodes the authors describe some protocol behaviors enhancing routing resiliency under several combined routing attacks.