Software errors and malfunctions can occur due to mistakes, accidents or random events. However, in an interconnected world, websites and other systems are often accessible to the entire world. Inevitably, some of those people will have malicious or criminal intent.
This topic looks at the likely targets of malicious users (ie what they are attempting to damage or steal), and the sort of attacks they might use (and how to defend against them). First we look at some basic concepts of security.
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