DE3826136A1 - POWER SUPPLY SECURITY SYSTEM FOR COMPUTER - Google Patents

Abstract

A power control security system for a computer uses a code controller to control a power switch such as a relay or S.C.R. so that data stored in the computer are not disclosed without keying in the correct code of the code controller. The code controller includes a set of switches for setting a main code, a keyboard and a remote control input for receiving input of a code, a remote control output for sending out a code, a power control output for controlling the power switch and a keyboard control output for controlling lock-in of the keyboard. <IMAGE>

Description

The invention relates to a power supply security system for computers according to the preamble of claim 1.

To back up data stored in a computer you use either hardware or software. The former used a mechanical lock or a code lock to a Compu ter turn on, or entering a keyboard while the latter the principles of a code comparison, a data name encryption or similar used. Still be the mechanical lock and the code lock are slightly damaged, so that data stored in the computer can be easily copied or can be changed. Such a certainty must continue on the spot by a responsible person accessible, which creates many difficulties. With regard to the latter, the data can be printed out, so that they still go through some complicated procedures can be read out. Because the well-known security device are insufficient to ensure that in the computer stored data are not stolen, they correspond not the requirements of the market.

It is therefore an object of the present invention to create a compu to create a security system of the type mentioned at the beginning, that avoids the disadvantages mentioned above and a code control used to switch a power switch, e.g. a relay, S.C.R. or TRAC control, so that stored in the computer Data will not be output unless a correct code the code control is entered.

This object is characterized by that in claim 1 Invention solved.

With the invention, a computer is advantageously security system created on the spot via a  Computer network or checked by means of radio frequency signals can be.

Furthermore, a Com computer security system created, which ensures that the data stored in a computer is not without permission nis copied or changed.

The computer security system according to the invention is simple manufacture, cheap and easy to use.

In the following an embodiment of the electricity supplier security system based on the drawing, the one before represents preferred embodiment of the invention, to be discribed. The drawing is for loading only spelling and representation and is not intended the invention in any Restrict way. Show it:

FIG. 1 is an electric circuit of a control code; and

Fig. 2 shows a communication circuit.

The following description shows the same components same terms used. Nevertheless, it should be pointed out that the invention is not limited thereby, and that changes and modifications to the facilities shown conditions and other changes to the facilities shown and other applications that are obvious to the expert are intended to fall within the scope of the invention.

In Fig. 1, a code control is shown, the main Lich a single chip microprocessor U 1 , a set of switches SW , a keyboard, a remote control input RX , a remote control output TX , a current control output 32 , a keyboard control output 31 and some resistors, capacitors and transistors includes. The switches SW are used to define a four-digit code. To set the code, first press the PW key on the keyboard and then enter a code, such as a factory preset code 4321, and another code, such as 9876. The procedure described above can change the code as desired. In the meantime, the current control output 32 has not been actuated. If you want to turn on the power, it is necessary to first press the PW key on the keyboard and then press the code, such as 9876, to turn on the computer or the power switch of the hard disk drive. If the code is entered again, it is switched off. The keyboard control output 31 is used to control the keyboard lock signal, the function and control of which are the same as mentioned above. The remote control output TX and the remote control input RX use a computer network or remote control communication to achieve the function thereof. Fig. 2 shows the communication circuit. As shown, the code can be transmitted to the communication circuit ( TX +, TX -) via the transformation of an electrical interface U 3 from the remote control output TX . Conversely, it can be done via the signal of the communication circuit ( TX +, TX -), which was taken out by another interface U 4 and is then transmitted to the single-chip microprocessor U 1 of the coding control from the remote control input RX for differentiation. If the code is correct, it controls the computer or mechanism according to the principle mentioned above.

In summary, the invention is essentially by fol marked:

1. The present invention can be used in microcomputers, Perso nal computers as well as a power supply, e.g. as exchange the power supply of a workstation, are used only the code output and the input parts, e.g.  the keyboard. So if not a real one Code is entered and the power supply does not have a switch to switch on, the indoor relay switch cannot turn on be turned on, and the computer is not powered provided. As the input of an exchange power supply AC is while the output is DC it is impossible to use the AC power supply for the Use computers without reviewing the present Invention, whereby the data stored in the computer ver remain confidential

2. The present invention can also be used in important mechanical parts, e.g. the hard disk drive used will. Since it is integral with the present invention the hard disk drive has no power, if not the correct code is entered so that it prevents that data stored on the hard disk is printed out.

3. The present invention of the integrated circuit that uniformly through the microprocessor or the integrated Control circuit is formed, controls the power supply the same. Therefore, if no correct code is entered, no power is supplied and the data stored in the computer Data can be kept confidential.

Although the present description to some extent Peculiarity, it should still be understood that only one example has been described and that numerous changes developments in detail and the combination of the arrangement of the Parts can take place without departing from the spirit and scope of the Remove invention.

Claims (3)

1. Power security system for computers using a code control to control a power switch, such as a relay, so that data stored in the computer will not be output unless a correct code control code is entered, characterized by

• - a set of switches ( SW ) for setting a main code;
• - a keyboard and a remote control input ( RX ) for entering a code;
• a remote control output for sending a code;
• - A current control output ( 32 ) for controlling a current switch, such as a relay, SCR or TRAC; and
• - A keyboard control output ( 31 ) for controlling the locking of the keyboard.

2. Power security system according to claim 1, characterized in that the input and output of the Codes by transforming an interface over a Communication circuit is performed. 3. Power security system according to claim 1, characterized in that the code control with a ge controlled power supply or uniformly with a controller th integrated circuit can be combined.