Patent ID: 6618807
Filing Date: 2003-09-09
Classification: G06F

Abstract:
A computer system comprising:a system memory for storing programs, files, and a display control program for displaying the programs or files stored in the system memory on a display device in the form of an icon; a processor connected to the display device for executing the programs stored in the system memory; a cryptoprogram for encrypting or decrypting a program or file stored in the system memory; an I/O (input/output) port connected to the processor; and an electronic key which can be inserted into and removed from the I/O port comprising a programmable memory for storing passwords; wherein when encrypting a program or file stored in the system memory, the cryptoprogram encrypts the program or file according to a password and stores the password in the programmable memory of the electronic key, and the display control program conceals the icon representing the program or file, and when decrypting a program or file stored in the system memory, the cryptoprogram searches for a password corresponding to the program or file in the programmable memory of the key and decrypts the program or file if the corresponding password is found, and the display control program displays the icon representing the program or file on the display device.