By now, it is a truism to say that ICT technology is spreading rapidly. As growing economies like China, Brazil and India are nowhere near their full potential for ICT use, and even prominent western countries have not yet reached this limit (see figure 1), it is unlikely that this global trend is going to stagnate in the near future. It does, however, give rise to security challenges. The proliferation of ICT, especially in western societies, has increased dependence on digital systems. Information retrieval, online banking and digital process control systems are examples of processes that have been optimised through the use of ICT. The downside to these improvements is that they have made societies vulnerable to cyber attacks.
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