Network Security And Firewalls

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and network security. They are the most common because of three main reasons. First of all, passwords are cheap to implement. Virtually all computers have a password system built into it already. Every home computer can have a password to lock out certain programs from users other than yourself. Even networked computers and systems can have an elaborate password system at a minimal cost to the company. Passwords are also fast. When a computer prompts you for a user identification and password, you simply type it in and away you go. There is usually very little else that needs to be done. The third benefit to passwords are that they are easy to remember. A user usually chooses a password that is close to them, therefore, it cuts down on the amount of people having problems with getting into the programs they need. The latter benefit to passwords is also its greatest weakness.
People's inherent nature is to pick a password that is close to them. They usually will ...

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the incoming password at this time. A second type of high security password system is a challenge-response system. This system makes the users memorize a set of rules to convert a challenge issued by the computer into the correct response (Net Security, 2). The drawback to this system is that if you have a large number of computer users, it is difficult to have everyone memorize the rules, make sure the rules are easy enough to remember, and keep the rules secret. No matter what kind of password system you use, there will always be drawbacks to it.
Another way to offer security is to build walls around what you want secured. In the computer industry, these are called firewalls. A ...

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