JPH10161865A - Security system and security processing method - Google Patents

Abstract

(57) [Summary] [Problem] It is impossible to prevent a third party from acquiring an application program downloaded from a host computer without permission. A host computer (1) downloads an application program (11) to a volatile memory module (21) of a terminal device (2), an open / close sensor (23) detects opening of a terminal housing (22), and transmits a power-off signal to a power supply circuit (24). Then, the power supply of the terminal device is forcibly turned off, the application program stored in the volatile memory module is erased, and when the power supply of the terminal device is turned on again, the host computer checks the download permission flag of the terminal monitoring program 12. The application program is not re-downloaded except for opening the terminal housing permitted by the host computer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security system, and more particularly to a security system for protecting application programs in a 24-hour online system in which information from a plurality of terminal devices is managed by a host computer. .

[0002]

2. Description of the Related Art Conventionally, in an online system in which information from a plurality of terminal devices is managed by a host computer, an application program is downloaded and arbitrary processing is performed by the terminal devices.

An example of a conventional online system is described in Japanese Patent Application Laid-Open No. 63-120353. The online system described in this publication downloads an application program from a host computer to a terminal device, performs arbitrary processing, and then automatically deletes the program by a code written in the application program itself, When a code indicating the end of the program is input from the terminal device, the host computer erases the application program.

[0004]

A problem with the above-mentioned prior art is that the security of the downloaded application program cannot be maintained.

[0005] The reason is that no consideration is given to the terminal device in terms of hardware, the terminal device can be easily disassembled, and an application program can be obtained.

An object of the present invention is to provide a security system that prevents a third party from obtaining a downloaded application program without permission.

[0007]

According to the security system of the present invention, an application program is downloaded from a host computer, the terminal device operates by expanding the program into a volatile memory module, and the terminal device operates as an open / close sensor. When the terminal is opened without detecting permission from the host computer, the terminal power is forcibly turned off. When the terminal is forcibly turned off, the application program used for memory expansion is erased, and the application program is deleted. Cannot be obtained, and the host computer can always monitor the terminal device to detect the power OFF of the terminal device. If the terminal device is opened without permission, the application program is downloaded even if the terminal device is turned ON again. Absent.

[Operation] Since the opening / closing sensor detects the opening of the terminal casing and forcibly turns off the terminal power supply, the application program used by developing the memory in the volatile memory module is erased. Also, turn on the power of the terminal device again.
In the above, when the application program is downloaded from the host computer, the terminal monitoring program determines whether or not the application program is available. This makes it impossible for a third party to acquire the application program.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the security system of the present invention.

Referring to FIG. 1, a host computer 1
Has an application program 11 to be downloaded to the terminal device 2 and a terminal monitoring program 12 for determining whether to download the application program 11 to the terminal device 2.

The terminal device 2 includes a volatile memory module 21 for developing the application program 11 into a memory,
An open / close sensor 23 for detecting the opening of the terminal housing 22 and a power supply circuit 24 forcibly turning off the power in response to a power-off signal from the open / close sensor 23 are provided.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIG.

FIG. 2 is a flowchart showing the operation of one embodiment of the security system of the present invention.

First, the host computer 1 downloads the application program 11 to the terminal device 2 when the power of the terminal device 2 is turned on (step S1) (step S2).

The terminal device 2 transmits the downloaded application program 11 to the volatile memory module 2.
1 (step S3), and a normal operation is performed (step S4).

Here, when a third party opens the terminal housing 22, the opening and closing sensor 23 detects the opening (step S5) and sends a power-off signal to the power supply circuit 24 (step S5).
6) Forcibly turn off the power of the terminal device 2 (step S)
7).

When the power of the terminal device 2 is forcibly turned off,
The application program 11 used in the volatile memory module 21 is deleted (Step S
8).

When the power of the terminal device 2 is turned on again (step S
9), the host computer 1 has a terminal monitoring program 12
Check the download permission flag (step S1).
0), the application program 11 is re-downloaded only when the terminal housing 22 is opened as permitted by the host computer 1 for maintenance or the like (step S2). However, when the terminal housing 22 is opened to the host computer 1 without permission, the application program 11 is not re-downloaded (step S11).

[0020]

As described above, the first effect of the security system of the present invention is that the terminal device is turned off because the application program is used in the volatile memory module in the memory expansion in the terminal device. And the application program is erased.
This makes it possible to prevent a third party from opening the terminal housing and acquiring an application program.

The reason is that, since the terminal housing is provided with an open / close sensor, when the opening is detected, a power-off signal is transmitted to the power supply circuit to forcibly turn off the terminal power.

A second effect is that, even when the terminal device is turned on again, the application program is not re-downloaded except for opening the terminal housing permitted to the host computer for maintenance or the like. As a result, it is possible to prevent the acquisition of the application program due to the modification of the terminal housing.

The reason is that, since the host computer has the terminal monitoring program, it is possible to determine whether or not downloading is possible by turning on the terminal power.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a security system according to the present invention.

FIG. 2 is a flowchart showing an operation of the security system according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host computer 2 Terminal device 11 Application program 12 Terminal monitoring program 21 Volatile memory module 22 Terminal housing 23 Open / close sensor 24 Power supply circuit

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Claims (3)

[Claims] 1. A security system wherein an open / close sensor detects the opening of a terminal housing, generates a power-off signal, and forcibly turns off the terminal power. 2. A security system wherein an application program is loaded into a volatile memory module in a memory. 3. The power supply of the terminal device is forcibly turned off when the opening / closing sensor detects the opening of the terminal housing, the application program stored in the volatile memory module is erased, and the power supply of the terminal device is turned on again. A security processing method characterized in that an application program is not downloaded from a host computer to a terminal device except for opening of a terminal housing permitted by the host computer.