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Science China Mathematics 2010年第1期53卷 203-212页

作者： dougherty steven T Department of Mathematics University of Scranton ScrantonPA 18510 USA

In this paper,we generalize the concept of Type Ⅱ codes to arbitrary finite rings. We focus on Type Ⅱ codes over finite chain rings and use the Chinese Remainder Theorem on these codes to study Type Ⅱ codes over pr... 详细信息

关键词： finite principal ideal rings finite chain rings self-dual codes Type Ⅱ codes

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CYCLIC CODES OVER FORMAL POWER SERIES RINGS

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Acta Mathematica Scientia 2011年第1期31卷 331-343页

作者： dougherty steven T. 刘宏伟 Department of Mathematics University of Scranton Department of Mathematics Huazhong Normal University

In this article, cyclic codes and negacyclic codes over formal power series rings are studied. The structure of cyclic codes over this class of rings is given, and the relationship between these codes and cyclic codes over finite chain rings is obtained. Using an isomorphism between cyclic and negacyclic codes over formal power series rings, the structure of negacyclic codes over the formal power series rings is obtained.

关键词： Finite chain rings cyclic codes negacyclic codes γ-adic codes

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Smart Meter Deployment Threat and Vulnerability Analysis and Response

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Journal of Energy and Power Engineering 2015年第2期9卷 199-213页

作者： steven dougherty Takaki Saitoh Cyber Security Architect Energy & Utilities Global Center of Competency Global Business Services Sacramento 95814California USA Registered Management Consultant Registered Professional Engineer Global Technology Services Osaka 5340000 Japan

Advanced intelligent or ＂smart＂ meters are being deployed in Asia. A result of deployment of smart meters, with associated equipment, is the electric power industry faced with new and changing threats, vulnerabilities and re-evaluate traditional approaches to cyber security. Protection against emerging cyber-security threats targeting smart meter infrastructures will increase risk to both the utility and customer if not addressed within initial rollouts. This paper will discuss the issues in SMI （smart meter infrastructures） deployments that pertain to cyber security. It will cover topics such as the threats to operations, infrastructure, network and people and organization and their associated risks. SMI deployments include not only the smart meter, but also the interfaces for home energy management systems as well as communication interfaces back to the utility. Utilities must recognize and anticipate the new threat landscape that can attack and compromise the meter and the associated field network collectors. They must also include threats to the WAN （wide-area-network） backhaul networks, smart meter headends, MDMS （meter data management systems） and their interfaces to CIS （customer information systems） and billing and OMS （outage management systems）. Lessons learned from SMI implementations from North America, Europe and recently, Japan, will be discussed. How white-box and black-box testing techniques are applied to determine the threat impact to the SMI. Finally, organizational change risk will be discussed and how utilities have responded to re-organizing and developing a security governance structure for the SMI and other smart grid applications.

关键词： Smart meter infrastructure cyber security risk assessment threat analysis meter vulnerability security operation center privacy.

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