The biggest change that has occurred in security over the last 30 years has been the change in the computing environment from small,tightly contained mainframes to a highly widespread network of much larger systems.

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The biggest change in security over the last 30 years has been the shift from a focus on securing small, isolated systems to addressing the challenges of securing highly interconnected and distributed networks, including the internet, cloud computing, and mobile devices. The scale of systems has varied, but the key change has been in connectivity and the complexity of threats.

The Biggest Change That Has Occurred in Security Over the Last