| 摘要 |
A personal computer having a security function, a security method therefor, and methods of installing and detaching a security device are provided. In the security method, a password is dispersedly stored in the personal computer and a hard disk is booted only when the password input by a user is valid and the boot data of a security device is the same as that of the hard disk. When recording a file on a floppy disk, the file is processed with an encryption function and an encryption table. Also, the file stored in the floppy disk is read using a decoding table. Further, when installing the security device, a partition is removed so as to prevent the hard disk from being used without any security device. Therefore, the password cannot be read by an unauthorized user and the hard disk cannot be booted without any security device. Also, due to the encrypting and decoding processes, a file copied without permission cannot be read by another personal computer.
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