Date Added: Mar 2012
In ad hoc network security is an important one. When an entire network move from one network to another is called NEtwork Mobility (NEMO). Mobile Virtual Private Network (VPN) is used to secure data transmission between unreliable external network and protected private internal network .The VPN support NEMO is called as Secure NEtwork MObility (SeNEMO), is based on Session Initiation Protocol (SIP) to support NEMO. Elliptic curve cryptography is used for key management. Handoff delay between access points is reduced by using handoff point's establishment in network mobility. This paper proposed reduces signal cost for data transmission.