里约200米短跑决赛:剑思庭

Siemens said it intends to fix a vulnerability discovered in its industrial control system products, but the NSS Labs researcher who found the bug says the company seems to be downplaying the seriousness of the problem to save face.

"The vulnerabilities are far reaching and affect every industrialized nation across the globe. This is a very serious issue," writes Dillon Beresford in his posting Monday on the online forum SCADASEC, where there's been discussion of last week's disclosure by Siemens that it intends to fix a vulnerability identified on May 9th by NSS Labs, and confirmed by the U.S. Department of Homeland Security's Industrial Control Systems Cyber Emergency Response Team (ICS CERT).

NSS Labs, which has shared its findings directly with Siemens, voluntarily canceled what was to have been a public talk at a conference on the issue last week after Siemens was unable to complete the fixes for its programmable logic controller (PLC) in time.

   说到用户需求是什么呢，通俗地说就是自控项目中客户想要达到的效果和东西。而专业上来说，也就是客户对自控系统提出的自己的要求标准，这个要求标准根据自己的使用目的、工艺、用途等可以提出自己的要求。自控集成商依据客户的需求进行自控设计（或确认自己已经完成设计的项目能符合需方的要求）。

   作为自控工程师在做项目之前这是过程是一定要洗礼的，弄清楚客户想要干什么和结果，是自控工程师首要任务。大家该说这还不简单！人家要什么我们就给人家编什么，其实不然不要小看了这个过程，十分重要，它是一个项目的龙头，如果它出了偏差后面设计和执行再正确也是枉然。在现实情况中我们会发现存在这样一种情况，那就是一个自控工程师在现场把在家里写的程序全部推翻在现场重新写了一份，实在让人感叹技术劳动力的脆弱。