| 摘要 |
One computer is for user purposes, whilst the second functions as a control, and when a symbol combination is fed into both computers the encoding algorithm converts it to another symbol combination which on authorisation is identical for both computers. The user computer memory function contains references specific for the authorities to which the holder of the computer possesses access, and on activation by a person-specific code related to a selected reference in its display function, shows the selected reference in the form of a third symbol combination. The computer, when activated by the person-specific code related to a selected reference, converts by an encoding algorithm and an encoding key the selected reference to a fourth symbol combination which is presented in the display function. The control computer, using the encoding algorithm and encoding key, converts the fourth symbol combination to a reference giving access to authorities, which reference is shown in the computer display function. The encoding algorithm and key are time-variable time-variable. |
