SCADA, or often referred as Process Control Systems (PCS) is interpreted as an overall collection of control systems that measures, reports, and changes processes SCADA is the acronym of Supervisory Control and Data Acquisition, which is a communication technology scheme for collecting data from distant facilities and also controlling them on control systems.
In the beginning SCADA system was locally introduced, and it has been applied to larger and wide-area systems as the information technology evolves.
As SCADA system expands to wide area, it has been connected to common communication infrastructure while it was a locally independent control system network initially.
A SCADA system allows an operator to make set point changes on distant
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To continuously monitor and control the different sections of the plant in order to ensure its appropriate operation leads to the use of Supervisory Control and Data Acquisition (SCADA) systems.
A SCADA system normally supports communication between a central control unit and multiple remote units equipped with sensors, actuators, and/or Programmable Logic Controllers (PLCs).
SCADA systems were first designed to meet the basic requirements of process control systems where security issues were hardly a concern.
However, the growing demands for increased connectivity between a SCADA system and other network components, such as the corporate network and the Internet, expose the critical parts of a SCADA system to the public.
1) SCADA Server or Master Terminal Unit (MTU): This Server device acts as the Master in a SCADA system.
Cyber attacks on SCADA system can take routes through Internet connections, business or enterprise network connec- tions and or connections to other networks, to the layer of control networks then down the level of field
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Successful attacks either can occur from the Internet, the corporate network or could arise from within the SCADA network itself.
The National Institute of Standards and Technology (NIST), United States National Security Agency (NSA), United States Department of Energy, The President 's Critical Infrastructure Protection Board as well as Public Safety and Emergency Preparedness Canada (PSEPC) have recognized that security in SCADA systems is essential.
The efficiency improvements based on network integration brought the cyber security risks into the control systems of critical infrastructures operated by SCADA system.
Compared to IT networks, control systems might be more vulnerable to cyber attacks for its characteristics of the real time operation.
1 shows the comparison of characteristics between information systems and control systems.
Furthermore, the recent trend in standardization of soft- ware and hardware used in SCADA systems makes it even easier to mount SCADA specific attacks.
Thus the security for SCADA systems can no longer rely on obscurity or on being a function of locking down a
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Never allow any machine on the control network to talk direct to a machine on the business organize or on the Internet. Though a couple of affiliations' mechanical control structures may not direct go up against the Internet, an affiliation still exists if those structures are related with a bit of the network. Affiliations may not comprehend this affiliation exists, but instead a persevering advanced hazard on-screen character can find such pathways and use them to access and try current control systems to try to make a physical result. Along these lines, affiliations are encouraged to coordinate serious assessments of their structures, including the corporate endeavor pieces, to make sense of where pathways exist.
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During 2003-2007, cisco registered a top durable top line growth period. They take a strong ability to manufacture and design new products with how the new world processes information. They have strong strategic industry partners and they have a good customer relationship. Cisco is a company that focuses on their core competencies. When they monitor and manage more than 10,000 devices, it becomes time consuming. Even with these problems cisco systems does have many strength...
Over the past few years, Internet-enabled businesses, or e-businesses, have drastically improved efficiency and revenue growth. E-business applications such as e-commerce, supply-chain management, and remote access allow companies to streamline processes, lower operating costs, and increase customer satisfaction. Such applications require mission-critical networks that accommodate voice, video, and data traffic, and these networks must be scalable to support increasing numbers of users and the need for greater data. capacity and performance of the system. However, as networks enable more and more applications and are available to more and more users, they become ever more vulnerable to a wider range of security threats.
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