LICSTER -- A Low-cost ICS Security Testbed for Education and Research

Unnoticed by most people, Industrial Control Systems (ICSs) control entire productions and critical infrastructures such as water distribution, smart grid and automotive manufacturing. Due to the ongoing digitalization, these systems are becoming more and more connected in order to enable remote control and monitoring. However, this shift bears significant risks, namely a larger attack surface, which can be exploited by attackers. In order to make these systems more secure, it takes research, which is, however, difficult to conduct on productive systems, since these often have to operate twenty-four-seven. Testbeds are mostly very expensive or based on simulation with no real-world physical process. In this paper, we introduce LICSTER, an open-source low-cost ICS testbed, which enables researchers and students to get hands-on experience with industrial security for about 500 Euro. We provide all necessary material to quickly start ICS hacking, with the focus on low-cost and open-source for education and research

Packet Scheduling For Heterogeneous Multicast Transmissions

Multicast transmissions naturally raise the problem of the heterogeneity of receivers in terms of networking possibilities, host performances and user desires. Several solutions have been introduced but none suits all the situations. This paper describes a scheduling algorithm that unies some of these solutions, in particular in case of continuous data ows, and which is suited to a broad range of applications. An implementation of this algorithm is used to illustrate its behavior. 1 Introduction: The Needs Multicast transmissions naturally raise the problem of the heterogeneity of receivers. Several levels of heterogeneity can be identied: (1) the intrinsic performance of various parts of the network can be largely different; (2) the network performance can vary over the time because of congestion problems, of external factors (e.g. weather conditions in case of wireless communications), or a change of communication technology (e.g. switching from WaveLAN to GSM); (3) some privileg..

Active Multicasting for Heterogeneous Groups

Communication environments are becoming increasingly heterogeneous. This imposes new challenges on communication support for multimedia and collaborative applications. AMnet (Active Multicasting Network) provides multi-point communication support for large-scale groups with heterogeneous receivers. Active Multicasting nodes inside the network include so-called QoS filters that remove information from continuous media streams in order to reduce data rate for low-end receivers without affecting high-end receivers. A prototype implementation of AMnet based on RSVP is presented with some first performance results. Keywords Group Communication, Active Multicasting, QoS Filter 1 INTRODUCTION It is now well accepted that scalable and flexible multicasting support is increasingly needed for emerging communication systems. The demand is driven by multimedia applications, especially, by collaborative applications. The same holds for applications, such as scientific computing and distributed ..