Computer Security

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design a lock to lock up all our data or using identification to verify the identity of someone seeking access to our computers.

The most common method to lock up the data is using a password system. Passwords are a multi-user computer system's usual first line of defense against hackers. We can use a combination of alphabetic and number characters to form our own password. The longer the password, the more possibilities a hacker's password-guessing program must work through. However it is difficult to remember a very long passwords. So people will try to write the password down and it may immediately make it a security risk. Furthermore, a high speed password-guessing program can find out a password easily. Therefore, it is not enough for a computer that just have a password system to protect its data and memory.

Besides password system, a computer company may consider about the security of its information centre. In the past, people used locks and keys to limit access to ...

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method must be used. It is using something a person has --- physical trait of a human being.

We can use a new technology called biometric device to identify the person who wants to use your computer. Biometric devices are instrument that perform mathematical analyses of biological characteristics. For example, voices, fingerprint and geometry of the hand can be used for identification. Nowadays, many computer centers, bank vaults, military installations and other sensitive areas have considered to use biometric security system. It is because the rate of mistaken acceptance of outsiders and the rejection of authorized insiders is extremely low.

Individuality of vocal signature is one ...

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