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SCADA systems were traditionally “walled off” from other systems operating independently from the network. Prior to the awareness of possible attacks, this seemed to provide all the protection the SCADA system needed. They were largely proprietary systems with such limited access and esoteric coding that very few people would have the ability to access them to launch an attack. Over time, however, they became integrated into the larger company network as a means to leverage their valuable data and increase plant efficiency. Therefore, the reality is their security is now often only as strong as the security of the network.