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Abstract-Software Defined Networks (SDNs) is a network technology developed to deal with several limitations faced by the current traditional networks. However, SDN itself is confronted with security challenges which emanates specifically from its platform, given the explosive growth in network attacks and threats. Though many solutions have been developed and proposed, the continual lack of trust between the SDN controller and the applications running atop the control plane poses a great security challenge. SDN controller can easily be attacked by malicious/compromised applications which can result in network failure as the controller represents a single point of failure. Though trust mechanisms to certify network devices exist, mechanisms to certify management applications are still not well developed. Therefore, this paper proposes a novel direct trust establishment framework between an OpenFlow-based SDN controller and applications. The objective is to ensure that SDN controller is protected and diverse applications that consumes network resources are always trusted throughout their lifetime. Additionally, the paper introduce the concept of trust access matrix and application identity to ensure efficient control of network resources. We believe that, if the proposed trust model is adopted in the OpenFlow architecture, it could go a long way to improve the security of the SDN.

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All networks must provide an acceptable and desirable level of Quality of Service (QoS) to ensure that applications are well supported. This becomes a challenge when it comes to Mobile ad-hoc networks (MANETs). This paper presents a security framework that is QoS-aware in MANETs using a network protocol called Optimized Link State Routing Protocol (OLSR). Security & QoS targets may not necessarily be similar but this framework seeks to bridge the gap for the provision of an optimal functioning MANET. This paper presents the various security challenges, attacks, and goals in MANETs and the existing architectures or mechanisms used to combat security attacks. Additionally, this framework includes a security keying system to ascertain QoS. The keying system is linked to the basic configuration of the protocol OLSR through its Multi-point Relays (MPRs) functionality. The proposed framework is one that optimizes the use of network resources and time.

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