This document discusses SDN and security from Jeff Young of Telstra. It summarizes Telstra's Programmable Network, views potential vulnerabilities in Openflow networks including attacks on the controller and switch tables. It proposes solutions like protecting the controller and dropping unknown traffic. The document also discusses securing applications on the network through authentication and DOS protection. Finally, it lists several research papers related to SDN security including enforcing security on Openflow networks and securing SDN data plane protocols and programmability.