中文摘要：

随着科学技术的高速发展,工业化与信息化的不断融合,工业控制系统越来越多采用标准、通用的通信协议和软硬件系统,并且以各种方式接入互联网,从而打破了这些系统原有的封闭性和专用性,造成病毒、木马等安全威胁向工控领域迅速扩散。工业控制系统所面临的信息安全问题日益严重,而且呈现出诸多与传统IT系统不同的特点。为了简要介绍目前工控安全研究领域的新趋势和新成果,文章首先从工业控制系统的定义和三层结构出发,引出了工控系统的安全问题,利用详实的数据阐述了该安全问题的分布特点和发展趋势。接下来,文章从学术研究的角度,重点介绍了工业控制系统信息安全领域的专门国际会议ICS-CSR。通过比较已经举办过的两届ICS-CSR会议所收录的论文,就攻击者与攻击途径、网络攻击的检测与响应、系统安全建模与脆弱性分析,以及工控安全的社会-技术性等多个重要问题进行了详细的讨论,总结了工控安全研究中的主要问题、思路、方法和结论,阐述了该领域的当前态势和未来方向。最后,文章提出了纵深防御的安全理念,并以此为指导,构建了由边界系统、防御系统、防危系统等三部分组成的综合防御体系,旨在为工业控制系统提供全方位、多层次、完整生命周期的保护。

英文摘要：

With the rapid development of science and technology and the continuous fusion of industrialization and inforrnatization, industrial control systems （ICSs） are more and more adopting standard, universal communication protocols and software/hardware systems, and being connected to the Internet in various manners. It breaks the original closure and exclusiveness of these systems, and causes security threats （such as viruses and trojans） to spread promptly into the field of industrial control. ICSs are encountered with increasingly serious information security threats that show different features from those of traditional IT systems. To briefly introduce the new trends and achievements in the field of ICS security research today, this paper presents the definition and 3-level architecture of ICSs, brings in the problem of ICS security, and elaborates the distribution and tendency of the security problem by detailed data. After that, this paper focuses on introducing the international conference ICS-CSR that is dedicated to the field of ICS information security from the viewpoint of academic research. By comparing the papers collected in the first and second ICS-CSR conferences, this paper investigates in detail on the issues of attackers and attack vectors, detection and response of cyber attacks, security modeling and vulnerability analysis of systems, and the socio-technical nature of ICSs, summarizes the main problems, ideas, approaches and conclusions in the research of ICS security, and presents the current situation and future direction of this field. Finally, this paper proposes the security concept of defense-in-depth, according to which a comprehensive defending system composed of boundary system, protection system and safety system is established aiming to provide ICSs with omni- directional, multi-layered and whole life-circle protection.