Secrurity

Secrurity About two hundred years before, the word "computer" started to appear in the dictionary. Some people even didn't know what is a computer. However, most of the people today not just knowing what is a computer, but understand how to use a computer. Therefore, computer become more and more popular and important to our society. We can use computer everywhere 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 lot of important information can be found in the memory of computer. So, people may ask a question: Can we make sure 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 causes of destroying the data in the computer. For example, send a flood of coffee toward a personal 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 computer, system, security, password, people, data, information, one, hackers, however, steal, protect, using, person, need, memory, biometric, voice, therefore, lot, kind, easily, passwords, make, magnetic, just, identity, hand, hacker, card-keys, card, besides, verify, two, three