Protecting A Computer

About two hundred years before, the word computer started to appear

in the dictionary. Some nation even didnt know what is a computer.

However, most of the people instantly not equitable knowing what is a computer, but

understand how to use a computer.

Therefore, computer become more and more popular and historic to our

society. We can use computer e reallywhere and they are very useful and

helpful to our life. The speed and accuracy of computer made people felt

confident and reliable. Therefore, many important information or data are

saved in the computer. Such as your diary, the financial situation of a oil

company or some secret intelligence of the military department. A handle of

important information can be found in the computer memory of computer. So, people

may ask a question: Can we make accepted that the information in the computer

is safe and nobody can steal it from the memory of the computer?

Physical hazard is one of the stimulates of destroying the data in the

computer. For example, send a flood of coffee toward a personalized computer.

The hard disk of the computer could be endangered by the flood of coffee.

Besides, human caretaker of computer system can cause as much as harm as

any physical hazard.



For example, a cashier in a bank can transpose some

money from one of his customers account to his own account. Nonetheless,

the most dangerous buccaneer are not those who work with computer every day,

but upstart amateurs who experiment at night --- the hackers.

The term hacker may have originated at M.I.T. as students jargon for

classmates who labored nights in the computer lab. In the beginning,

hackers are not so dangerous at all. They just stole computer time from the

university. However, in the early 1980s, hackers became a...

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