Paper Title
Software Defined Networks based Centralized Authentication Server with Minimized Authentication Delay

The software defined networks (SDN) models are utilized to manage the complex networks by using the programmatic structure instead of the configurable devices. The software defined networks are usually deployed over the intermediate network management hops, which includes the router (Layer 3), switches (Layer 2 and Layer 3), etc. In this paper, our model is based upon the SDN security. The proposed model gives the design for the security enforcement while propagating the data between the switches within the network. The target integrity based network evaluation has been considered as the primary focus for the design of the proposed model, which takes upon the spoofed IPs and falsely prioritized switches to migrate the illegal routes to gain the advantage for the man in the middle (MITM) and other sniffing and snooping attacks. The proposed model has been accessed on the basis of various performance parameters, which includes the authentication delay, throughput etc. The proposed model has shown the robust performance as well as outperformed when compared to the existing model based upon the adaptive authentication layer server (AALS). The proposed model utilizes the SDN-CAS (SDN-centralized authentication server), which controls the authentication process between the switches for the secure propagation. The proposed model has outperformed the existing model based upon the authentication delay based upon the encryption with both of existing models, which includes with or without encryption. Keywords - Encryption, Authentication, SDN-CAS, centralized authentication server