This is a computer system used to monitor and control processes related to infrastructure, industry or based in a facility. These systems usually consist of four subsystems that include the Human – Machine Interface, Remote Terminal Units, Programmable Logic Controller and Communication.

SCADA systems are usually confused with Distributed Control Systems but the difference is that processes are not controlled in real time. Changes in the networking technology have an effect on these systems with protocols based on TCP/IP and Ethernet replacing older standards.

These systems are popular because there is more convenience when viewing processes from remote areas. The change solutions that are more standardized and open and increase in internet connections, have made SCADA systems more prone to attacks.

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Global Systems for Mobile (GSM) is a 2G technology used by many countries worldwide. The many phones supported by GSM  are becoming cheap with people looking for an alternative way of communicating has many goals and one of them is to support international roaming as well as broaden the spectrum of efficiency supports new services, has low costs for mobile sets and compatibility features with other telephones. Over five hundred and fifty people use the GSM networks in over one hundred and seventy countries.

The introduction of cheap GSM phones has made it easy for people to communicate without worry of the digital voice quality. Secure communications, call privacy, high speed data, SMS and paging are additional packages you get.

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