Design Considerations for Building Credible Security Testbeds: Perspectives from Industrial Control System Use Cases

This paper presents a mapping framework for design factors and an implementation process for building credible Industrial Control Systems (ICS) security testbeds. The security and resilience of ICSs has become a critical concern to operators and governments following widely publicised cyber security events. The inability to apply conventional Information Technology security practice to ICSs further compounds challenges in adequately securing critical systems. To overcome these challenges, and do so without impacting live environments, testbeds are widely used for the exploration, development, and evaluation of security controls. However, how a testbed is designed and its attributes, can directly impact not only its viability but also its credibility. Combining systematic and thematic analysis, and the mapping of identified ICS security testbed design attributes, we propose a novel relationship map of credibility-supporting design factors (and their associated attributes) and a process implementation flow structure for ICS security testbeds. The framework and implementation process highlight the significance of demonstrating some design factors such as user/experimenter expertise, clearly defined testbed design objectives, simulation implementation approach, covered architectural components, core structural and functional characteristics covered, and evaluations to enhance confidence, trustworthiness and acceptance of ICS security testbeds as credible. These can streamline testbed requirement definition, improve design consistency and quality while reducing implementation costs

ON THE BIOLOGY OF PSYLLID PAUROPSYLLA DEPRESSA CRAWFORD (HOMOPTERA : PSYLLIDAE)

Biological observations such as emergence of adults, mating behaviour oviposition, fecundity and sex ratio of the gallicolous insect, P. depressa are detailed in the present paper. While the phenomenon of mating occurs in three successive phases viz. pre-copulation, copulation and post-copulation, the oviposition is performed in two phases, viz. pre-oviposition and oviposition. The females, which differ from the males by colour and certain morphometrical characters, predominate over the males

The Witan, 1977-1978 Academic Year V. 5 No. 4, November 1977

A Look at the Indians, Selection of Legal Counsel, Punto De Vista, Contra Punto, Reversed on Appeal, Shysters vs 55'ers, Sue's City, Media Momus, Support Your Local Police, Expansion of Magistrates Roles, Rush Results, Placement News, Where the Law Ends

The Witan, 1977-1978 Academic Year V. 5 No. 4, November 1977

A Look at the Indians, Selection of Legal Counsel, Punto De Vista, Contra Punto, Reversed on Appeal, Shysters vs 55'ers, Sue's City, Media Momus, Support Your Local Police, Expansion of Magistrates Roles, Rush Results, Placement News, Where the Law Ends