Design and implementation of mobile IP system with security consideration

As the commercial use of the Internet is becoming common and the demand for mobile computing over the Internet is emerging, it is necessary to construct a secure mobile environment. This paper presents an implementation example of such a system which employs a secure mobile IP protocol on stationary security gateways and mobile hosts. The IETF standard Mobile IP protocol is modified with IP security primitives, which control the packet flow from a mobile host through multiple security gateways. Using IP security primitives, the packet going into a corporate network and the packet going out of the visiting network are both securely processed. This IP security based packet control allows transparent mobile access from anywhere on an IP network even with sufficient security support by encrypting and authenticating lp packets. The current implementation status and the performance evaluation are also reported.