The amount of mobile and nomadic computing is expected to increase dramatically in the near future. Hand in hand with this ubiquitous mobile computing security and privacy problems show up, which have not been dealt with sufficently up to now. The main problems are traffic analysis and the easy access to location information, for example in the popular Internet just by looking at the address headers of messages. In this paper the need for security and privacy supporting networks is discussed. We present the Non-Disclosure Method (NDM) as a way to provide the user with variable and scalable security and privacy. We exemplarily demonstrate the applicability of NDM in an existing network by presenting an upward compatible protocol extension to the Internet Protocol (IP), the Secure IP in IP Protocol. Its main design goal is the untraceability of network connections in mobile environments. I. Introduction Today, the TCP/IP protocol suite provides little or almost no security to the user...

This paper describes a protocol that allows transparent routing of IP packets to mobile hosts in the Internet, while using only the mobile host's home IP address. The protocol, called IMHP (Internet Mobile Host Protocol), requires no changes in stationary hosts that communicate with mobile hosts, and requires no changes in mobile hosts above the IP level. IMHP quickly converges to optimal routing following the movement of a mobile host, while preserving the current level of security in the Internet. Detailed examples of operation are presented. Keywords: Mobile hosts; mobile networking; TCP/IP; internetworking; network protocols 1. Introduction Within the last few years, there has been impressive growth in the number of portable computers in use. Moreover, the fact that a computer is portable no longer implies that it has limited processing power. Today's mobile computers have hundreds of megabytes of disk space, window-based user interfaces, color displays, and sophisticated device...

This paper describes the Internet Mobile Host Protocol

Much research has been devoted to mobile computing and database query management with the advent of portable computers and wireless communication systems. This paper proposes an architecture based on current mobile models, but with the addition of a mailbox, which serves as a storage area for the mobile hosts. Mobile Hosts (MHs) and Mobile Support Stations (MSSs) are connected over a wireless virtual subnet, and the MSSs are in turn connected to a wired static network. The architecture uses the TCP/IP protocol for communication in a mobile computing environment. Cellular providers (CP), the mobile network, and supporting hardware are defined and then assembled into a detailed example which traces the database query through the architecture. 1 Introduction In the past, computer users would have to disconnect from the network every time they needed to travel, but with the emergence of wireless connections the user is able to maintain a connection to the network during movement. A mobile...