Chapter 5. Concepts in IP Security

No topic related to the Internet, with the possible exceptions of the flee availability of pornography and the plague of unwanted spam email, has received more attention in the mainstream media than “security.” For the average user the concerns are predominantly viruses that may infect their personal computers, causing inconvenience or damage to their data. Increasingly we also hear about white-collar e-criminals who steal personal financial details or defraud large institutions after illegally gaining entry to their computer systems.

We are also now all familiar with catastrophic failures of parts of the Internet. Although these are sometimes caused by bugs in core components (such as routers) or by the perennial ...

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