Developing Network Domain Security (NDS) Model for IP Multimedia Subsystem (IMS)

In this research article we discuss the protocols, architecture and propose the design of Network Domain Security (NDS) model for IP Multimedia Subsystem (IMS). The IMS is standardized by 3GPP (Third Generation Partnership Project) and 3GPP2 as next generation service delivery platform developed for IP technology on top of all access networks including mobile and fixed networks. The architecture of IMS-NDS is based on Network Domain Security/Internet Protocol (NDS/IP) which is deployed by Domain Security Gateways (SEGs). NDS/IP utilizes IP Security (IPSec) to implement security domain services. 3GPP Authentication Framework is introduced to authenticate the Security Gateways using NDS/IP that utilizes cryptographic security mechanisms and security protocols provided by the IP Security (IPSec) protocol. PKI is used to generate, manage and distribute digital certificates and keys in NDS/IP environment.