  Software Defined Networking (SDN) has emerged as a revolutionary paradigm to
manage cloud infrastructure. SDN lacks scalable trust setup and verification
mechanism between Data Plane-Control Plane elements, Control Plane elements,
and Control Plane-Application Plane. Trust management schemes like Public Key
Infrastructure (PKI) used currently in SDN are slow for trust establishment in
a larger cloud environment. We propose a distributed trust mechanism - TRUFL to
establish and verify trust in SDN. The distributed framework utilizes
parallelism in trust management, in effect faster transfer rates and reduced
latency compared to centralized trust management. The TRUFL framework scales
well with the number of OpenFlow rules when compared to existing research
works.
