Information processing device

Abstract

SOLUTION: In an information processing device 2, a display 5 with a touch panel includes at least either a flexible printed circuit board where a detection circuit 40 for detecting either wire-breakage or short-circuiting of itself is formed or a disassembly detection mechanism 34 for detecting that the display 5 has been disassembled. A control unit 28 for controlling the display 5 executes prescribed tamper-proof processing upon detection of either wire-breakage or short-circuiting by the detection circuit 40 when the display 5 is provided with the flexible printed circuit board, or executes tamper-proof processing upon detection of disassembly of the display 5 when the display 5 is provided with the disassembly detection mechanism 34.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an information processing apparatus.

Background Art

[0002] Conventionally, an information processing apparatus (information input apparatus) for inputting secret information such as a personal identification number (PIN) has been known (see, for example, Patent Document 1). The information processing apparatus described in Patent Document 1 includes a main control unit, a display unit, and an instruction acquisition unit. The display unit is a display such as a liquid crystal display. The instruction acquisition unit is a touch panel and is integrally formed with the display unit.

[0003] In the information processing apparatus described in Patent Document 1, the instruction acquisition unit acquires instruction information indicating a user's instruction with respect to the display unit, encrypts this instruction information, and transmits it to the main control unit. Specifically, the instruction acquisition unit detects the position (coordinates) touched by the user on the display unit, encrypts this position (coordinates), and transmits it to the main control unit. Therefore, in the information processing apparatus described in Patent Document 1, it is possible to prevent the secret information input by the instruction acquisition unit from being illegally acquired between the instruction acquisition unit and the main control unit.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The inventor of the present application has developed an information processing apparatus including a display with a touch panel into which confidential information requiring security is input, similar to the information processing apparatus described in Patent Document 1. In this information processing apparatus under development, in order to prevent unauthorized acquisition of confidential information input via the touch panel, it is preferable that the security of the display itself with the touch panel is enhanced.

[0006] Therefore, an object of the present invention is to provide an information processing apparatus including a display with a touch panel into which confidential information is input, and capable of enhancing the security of the display itself with the touch panel.

Means for Solving the Problem

[0007] To solve the above problems, an information processing apparatus according to an aspect of the present invention includes a display with a touch panel into which confidential information is input. The display includes a touch position detection mechanism for detecting a touch position which is a position touched on the touch panel, and a battery for supplying power to the display in a state where no power is supplied from the outside. A flexible printed circuit board is formed with a detection circuit for detecting at least one of disconnection and short circuit of itself, and a signal circuit for transmitting an output signal of the touch position detection mechanism. The display further includes at least one of a disassembly detection mechanism for detecting that the display has been disassembled. When the display includes a flexible printed circuit board, when the control unit for controlling the display detects at least one of disconnection and short circuit of the detection circuit, the control unit executes a predetermined anti-tampering process. When the display includes a disassembly detection mechanism, when the control unit detects that the display has been disassembled, the control unit executes an anti-tampering process.

[0008] In the information processing apparatus of this aspect, the display with a touch panel includes at least one of a flexible printed circuit board on which a detection circuit is formed and a disassembly detection mechanism. Further, in this aspect, when the display includes a flexible printed circuit board, the control unit that controls the display executes a predetermined anti-tampering process when detecting at least one of disconnection and short-circuit of the detection circuit, and when the display includes a disassembly detection mechanism, the control unit executes the anti-tampering process when detecting that the display has been disassembled.

[0009] That is, in this aspect, when the control unit detects an illegal act on the display with a touch panel, it executes an anti-tampering process. Therefore, in this aspect, it is possible to enhance the safety of the display with a touch panel itself. Further, in this aspect, since it is possible to enhance the safety of the display with a touch panel itself, it becomes possible to easily design an information processing apparatus that requires safety.

Effect of the Invention

[0010] As described above, in one aspect of the present invention, in an information processing apparatus including a display with a touch panel into which secret information is input, it is possible to enhance the safety of the display with a touch panel itself.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Best Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0013] (Configuration of Information Processing Apparatus) FIG. 1 is a perspective view of an information processing apparatus 2 according to an embodiment of the present invention. FIG. 2 is a block diagram for explaining the configuration of the information processing apparatus 2 shown in FIG. 1. FIG. 3 is a perspective view showing the protective substrate 14 and the display 5 etc. housed in the housing 15 shown in FIG. 1, extracted. FIG. 4 is a schematic diagram for explaining the configuration of the display 5 shown in FIG. 1. FIG. 5 is a cross-sectional view of the flexible printed circuit board 32 shown in FIG. 4.

[0014] In the following description, for convenience of explanation, the Z direction in FIG. 1 is taken as the vertical direction, the X direction in FIG. 1 orthogonal to the vertical direction is taken as the front-rear direction, and the Y direction in FIG. 1 orthogonal to the vertical direction and the front-rear direction is taken as the left-right direction. Also, the Z1 direction side in FIG. 1 which is one side of the vertical direction is taken as the "upper" side, the Z2 direction side in FIG. 1 which is the opposite side of the upper side is taken as the "lower" side, the X1 direction side in FIG. 1 which is one side of the front-rear direction is taken as the "front" side, and the X2 direction side in FIG. 1 which is the opposite side of the front side is taken as the "rear" side.

[0015] The information processing apparatus 2 of this embodiment is an apparatus for processing information including secret information. The information processing apparatus 2 is, for example, a settlement terminal used at the time of payment settlement. Also, the information processing apparatus 2 is mounted and used in, for example, an upper device such as an automatic ticket vending machine, a vending machine, an access control device, or an ATM (Automatic Teller Machine). The information processing apparatus 2 is formed in a generally flat rectangular parallelepiped shape with a thin thickness in the front-rear direction as a whole. The outer shape of the information processing apparatus 2 when viewed from the front-rear direction is a substantially rectangular shape with the left-right direction as the long side direction. In this embodiment, the user who uses the information processing apparatus 2 performs various operations from the front side of the information processing apparatus 2.

[0016] The information processing device 2 has an information communication function for non-contact and manual information communication with a non-contact IC card 3 (hereinafter referred to as "card 3") or a smartphone 4. Further, the information processing device 2 also has a function as an input device for inputting secret information using a user's fingertip or the like. In the information processing device 2, for example, a personal identification number such as a password is input. In the information processing device 2, the card 3 which is also a contact-type IC card or the card 3 which is also a magnetic card may be used. That is, the card 3 used in the information processing device 2 may have an external connection terminal of an IC chip or a magnetic stripe formed thereon.

[0017] The information processing device 2 includes a display 5 with a touch panel on which secret information such as a personal identification number is input, and a frame-shaped frame member 6 surrounding the display 5. The display 5 is fixed to the frame member 6. In this embodiment, the front portion of the information processing device 2 is constituted by the display 5 and the frame member 6. Further, the information processing device 2 includes a flexible printed circuit board (not shown) on which a communication antenna for non-contact information communication with the card 3 or the smartphone 4 is mounted. This flexible printed circuit board is formed, for example, in a rectangular frame shape and is disposed on the rear side of the frame member 6. Further, this flexible printed circuit board is housed in a housing 15 described later.

[0018] Furthermore, the information processing device 2 includes an IC card processing unit 7 for communicating data with a contact-type IC card, a magnetic card processing unit 8 for reading magnetic data recorded on a magnetic card and recording magnetic data on the magnetic card, and a code reading unit 9 for reading a two-dimensional code or the like displayed on the smartphone 4.

[0019] In addition, the information processing apparatus 2 includes a control board 12 on which a main control unit 11 for controlling the information processing apparatus 2 is mounted, a protection board 14 on which a detection circuit 13 for detecting disconnection and short - circuit of itself is formed, a housing 15 in which the control board 12 and the protection board 14 are accommodated, and a disassembly detection mechanism 16 for detecting that the information processing apparatus 2 has been disassembled. The detection circuit 13 of this embodiment is a second detection circuit, and the disassembly detection mechanism 16 is a second disassembly detection mechanism.

[0020] The IC card processing unit 7 is a manual dip - type card reader. The IC card processing unit 7 includes an IC contact block having a plurality of IC contact springs that contact the external connection terminals of a contact - type IC card. The magnetic card processing unit 8 is a manual swipe - type card reader. The magnetic card processing unit 8 includes a magnetic head for reading and recording magnetic data. The code reading unit 9 includes a camera for reading two - dimensional codes and the like. The IC card processing unit 7 and the code reading unit 9 are arranged on the front side and the lower side of the information processing apparatus 2. The magnetic card processing unit 8 is arranged at one end of the information processing apparatus 2 in the left - right direction.

[0021] The control board 12 is a rigid board such as a glass - epoxy board. The control board 12 is formed in a flat plate shape. The main control unit 11 includes a microcomputer 20. The microcomputer 20 includes a CPU (Central Processing Unit) 21. Also, the microcomputer 20 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and peripheral circuits and the like. The main control unit 11 is electrically connected to a host control unit (host) 22.

[0022] An antenna for communication for communicating with the card 3 and the like, the IC contact springs of the IC card processing unit 7, the magnetic head of the magnetic card processing unit 8, and the camera of the code reading unit 9 are electrically connected to the main control unit 11. A signal containing secret information is input to the main control unit 11. A signal circuit for transmitting a signal of data containing secret information is formed on the control board 12.

[0023] The protective substrate 14 is composed of two flexible printed circuit boards 23 and 24 bent into a predetermined shape. That is, the protective substrate 14 is a flexible printed circuit board. In this embodiment, the control substrate 12 is surrounded by two flexible printed circuit boards 23 and 24. That is, the control substrate 12 is surrounded by the protective substrate 14. The detection circuit 13 is formed over the entire area of the flexible printed circuit boards 23 and 24. The detection circuit 13 is composed of, for example, two pattern wirings.

[0024] The detection circuit 13 is electrically connected to the main control unit 11. Specifically, the detection circuit 13 is electrically connected to the microcomputer 20. The main control unit 11 (specifically, the microcomputer 20) detects that the detection circuit 13 is disconnected when at least one of the two pattern wirings constituting the detection circuit 13 is disconnected. Further, the main control unit 11 detects that the detection circuit 13 is short-circuited when one pattern wiring and the other pattern wiring among the two pattern wirings constituting the detection circuit 13 are short-circuited.

[0025] The area surrounded by the two flexible printed circuit boards 23 and 24 is a protection area where the control substrate 12 is arranged. The protection area is an area surrounded by the detection circuit 13 and is an area where safety (security) is ensured. In the example shown in FIG. 3, the entire control substrate 12 is surrounded by the protective substrate 14, but there may be a portion in the control substrate 12 that is not surrounded by the protective substrate 14. That is, the protective substrate 14 may surround a part of the control substrate 12.

[0026] As described above, the control substrate 12 and the protective substrate 14 are housed in the housing 15. Further, the housing 15 houses a communication antenna, an IC contact spring of the IC card processing unit 7, a magnetic head of the magnetic card processing unit 8, a camera of the code reading unit 9, and the like. A frame member 6 is fixed to the front end portion of the housing 15. A display 5 is arranged on the inner peripheral side of the frame member 6.

[0027] The disassembly detection mechanism 16 is, for example, a mechanical sensor having a contact switch. The disassembly detection mechanism 16 is disposed, for example, between the frame member 6 and the housing 15. The disassembly detection mechanism 16 is electrically connected to the main control unit 11. Specifically, the disassembly detection mechanism 16 is electrically connected to the microcomputer 20. When the frame member 6 is removed from the housing 15, the main control unit 11 (specifically, the microcomputer 20) detects that the information processing apparatus 2 has been disassembled.

[0028] The display 5 is a liquid crystal display (LCD). Therefore, in the following description, the display 5 is referred to as the "liquid crystal display 5". As described above, the liquid crystal display 5 is a display with a touch panel, and has an information input function in addition to the information display function. The liquid crystal display 5 includes a liquid crystal panel, a touch panel 27, and a control board 29 on which a control unit 28 for controlling the liquid crystal display 5 is mounted. The control board 29 is electrically connected to the control board 12 by a flexible printed circuit board 30 (hereinafter referred to as "FPC30").

[0029] The touch panel 27 includes a touch position detection mechanism 31 for detecting a touch position (coordinates) which is a position where the touch panel 27 is touched. The liquid crystal display 5 also includes a flexible printed circuit board 32 (hereinafter referred to as "FPC32") for electrically connecting the touch panel 27 and the control board 29, a battery 33 for supplying power to the liquid crystal display 5 in a state where no power is supplied from the outside, and a disassembly detection mechanism 34 for detecting that the liquid crystal display 5 has been disassembled.

[0030] The control board 29 is, for example, a rigid board such as a glass epoxy board. The control unit 28 includes a microcomputer 37. The microcomputer 37 includes a CPU 38, similar to the microcomputer 20. The microcomputer 37 also includes a ROM, a RAM, and peripheral circuits, similar to the microcomputer 20. The control unit 28 is electrically connected to the main control unit 11 via the FPC30.

[0031] The touch position detection mechanism 31 is built into the touch panel 27. The touch panel 27 is, for example, a capacitive touch panel, and the touch position detection mechanism 31 is a capacitance sensor. The touch position detection mechanism 31 is electrically connected to the control unit 28 via the FPC 32. Specifically, the touch position detection mechanism 31 is electrically connected to the microcomputer 37. The control unit 28 encrypts the data of the touch position detected by the touch position detection mechanism 31 and transmits it to the main control unit 11. Specifically, the microcomputer 37 encrypts the data of the touch position and transmits it to the main control unit 11. Note that the touch panel 27 may be a touch panel of another method such as a resistive film method.

[0032] As described above, the battery 33 supplies power to the liquid crystal display 5 in a state where no power is supplied from the outside. Specifically, the battery 33 supplies power to the CPU 38 to operate a part of the CPU 38 when no power is supplied to the liquid crystal display 5 from the outside. The disassembly detection mechanism 34 is, for example, a mechanical sensor having a contact switch. The disassembly detection mechanism 34 is electrically connected to the control unit 28. Specifically, the disassembly detection mechanism 34 is electrically connected to the microcomputer 37. The control unit 28 (specifically, the microcomputer 37) detects that the liquid crystal display 5 has been disassembled based on the detection result of the disassembly detection mechanism 34.

[0033] The FPC 32 is formed with a detection circuit 40 for detecting that it has been disconnected and short-circuited, and a signal circuit for transmitting the output signal of the touch position detection mechanism 31. The FPC 32 includes a detection circuit layer 41 in which the detection circuit 40 is formed and a signal circuit layer 42 in which the signal circuit is formed (see FIG. 5). The detection circuit layer 41 and the signal circuit layer 42 overlap in the thickness direction of the FPC 32. The detection circuit 40 is formed over the entire area of the FPC 32. The detection circuit 40 is composed of, for example, two pattern wirings.

[0034] The detection circuit 40 is electrically connected to the control unit 28. Specifically, the detection circuit 40 is electrically connected to the microcomputer 37. When at least one of the two pattern wirings constituting the detection circuit 40 is disconnected, the control unit 28 (specifically, the microcomputer 37) detects that the detection circuit 40 is disconnected. Further, when one pattern wiring and the other pattern wiring among the two pattern wirings constituting the detection circuit 40 are short-circuited, the control unit 28 detects that the detection circuit 40 is short-circuited.

[0035] In the information processing apparatus 2, when performing data communication with the card 3 or the smartphone 4 in a non-contact manner, the user shields the card 3 or the smartphone 4 from the front side to the liquid crystal display 5. When performing data communication with a contact-type IC card by the IC card processing unit 7, the user performs an operation of inserting and removing the card 3 in the front-rear direction with respect to the IC card processing unit 7. When reading magnetic data or the like by the magnetic card processing unit 8, the user operates the card 3 downward with respect to the magnetic card processing unit 8.

[0036] When reading a two-dimensional code or the like by the code reading unit 9, the user shields, for example, the two-dimensional code displayed on the smartphone 4 from the front side to the code reading unit 9. The personal identification number is input on the liquid crystal display 5. When the personal identification number is input, for example, keys of numbers from "0" to "9" are displayed on the liquid crystal display 5. The user touches the liquid crystal display 5 and inputs a password or the like.

[0037] In this embodiment, when the control unit 28 detects at least one of the disconnection and short-circuit of the detection circuit 40, the control unit 28 executes a predetermined anti-tamper process (abnormal process). Further, when the control unit 28 detects that the liquid crystal display 5 is disassembled, the control unit 28 executes an anti-tamper process. Specifically, as the anti-tamper process, the control unit 28 stops at least the operation of the CPU 38 to make the CPU 38 unusable.

[0038] When the CPU 38 becomes unusable, the CPU 38 does not recover even if the power of the information processing apparatus 2 is turned on / off or reset. When the control unit 28 detects at least one of disconnection and short circuit of the detection circuit 40, the detection content is stored in the RAM of the microcomputer 37. Also, when the control unit 28 detects that the liquid crystal display 5 has been disassembled, the detection content is stored in the RAM of the microcomputer 37.

[0039] In addition, the main control unit 11 monitors the control unit 28, and when the control unit 28 executes the tamper-resistant process, notifies the upper control unit 22 that the tamper-resistant process has been executed. Also, in this embodiment, when the main control unit 11 detects at least one of disconnection and short circuit of the detection circuit 13, it causes the control unit 28 to execute the tamper-resistant process. Further, when the main control unit 11 detects that the information processing apparatus 2 has been disassembled, it causes the control unit 28 to execute the tamper-resistant process.

[0040] (Main effects of this embodiment) As described above, in this embodiment, the control unit 28 executes the tamper-resistant process when it detects at least one of disconnection and short circuit of the detection circuit 40 and when it detects that the liquid crystal display 5 has been disassembled. That is, in this embodiment, when the control unit 28 detects an improper act on the liquid crystal display 5 with a touch panel, it executes the tamper-resistant process. Therefore, in this embodiment, it is possible to enhance the safety of the liquid crystal display 5 with a touch panel itself. Also, in this embodiment, since it is possible to enhance the safety of the liquid crystal display 5 itself, the design of the information processing apparatus 2 that requires safety becomes easy.

[0041] In this embodiment, when the main control unit 11 detects at least one of disconnection and short - circuit of the detection circuit 13, it causes the control unit 28 to execute the anti - tamper process, and when it detects that the information processing apparatus 2 has been disassembled, it causes the control unit 28 to execute the anti - tamper process. That is, in this embodiment, even when an improper act on a part of the information processing apparatus 2 other than the liquid crystal display 5 is detected, the control unit 28 executes the anti - tamper process. Therefore, in this embodiment, it is possible to further enhance the safety of the liquid crystal display 5 with a touch panel itself.

[0042] In this embodiment, the main control unit 11 monitors the control unit 28, and when the control unit 28 executes the anti - tamper process, it notifies the upper - level control unit 22 that the anti - tamper process has been executed. Therefore, in this embodiment, it is possible to make the upper - level control unit 22 recognize that the anti - tamper process has been executed in the liquid crystal display 5.

[0043] (Other embodiments) The above - described embodiment is an example of a preferred embodiment of the present invention, but it is not limited thereto, and various modifications can be made without changing the gist of the present invention.

[0044] In the above - described embodiment, the control unit 28 may detect only that the detection circuit 40 has been disconnected, or may detect only that the detection circuit 40 has been short - circuited. Similarly, the main control unit 11 may detect only that the detection circuit 13 has been disconnected, or may detect only that the detection circuit 13 has been short - circuited. Also, in the above - described embodiment, the detection circuits 13 and 40 may be constituted by one pattern wiring. In this case, when one pattern wiring is disconnected, the main control unit 11 detects that the detection circuit 13 has been disconnected, and the control unit 28 detects that the detection circuit 40 has been disconnected when one pattern wiring is disconnected. Further, in the above - described embodiment, the detection circuits 13 and 40 may be constituted by three or more pattern wirings.

[0045] In the above-described embodiment, the detection circuit 40 does not have to be formed on the FPC 32. That is, the liquid crystal display 5 does not have to include the FPC 32 on which the detection circuit 40 is formed. Further, in the above-described embodiment, the liquid crystal display 5 does not have to include the disassembly detection mechanism 34. Further, in the above-described embodiment, the protective substrate 14 may be constituted by a single flexible printed circuit board or may be constituted by a plurality of rigid substrates. Furthermore, in the above-described embodiment, the information processing apparatus 2 does not have to include the protective substrate 14 or the disassembly detection mechanism 16.

[0046] In the above-described embodiment, the main control unit 11 does not have to monitor the control unit 28. Further, in the above-described embodiment, when the main control unit 11 detects at least one of disconnection and short-circuit of the detection circuit 13, the main control unit 11 does not have to cause the control unit 28 to execute the anti-tamper process, and when detecting that the information processing apparatus 2 has been disassembled, the main control unit 11 does not have to cause the control unit 28 to execute the anti-tamper process.

[0047] In the above-described embodiment, the display 5 may be a display other than a liquid crystal display such as an organic EL display. Further, in the above-described embodiment, the information processing apparatus 2 does not have to include at least one of the IC card processing unit 7, the magnetic card processing unit 8, and the code reading unit 9. Furthermore, in the above-described embodiment, non-contact information communication may be performed between the information processing apparatus 2 and an information recording medium other than the card 3, or non-contact information communication may be performed between the information processing apparatus 2 and an electronic device other than the smartphone 4 such as an RFID tag.

[0048] (Configuration of the present technology) Note that the present technology can adopt the following configuration. (1) It includes a display with a touch panel for inputting secret information, The display device includes a touch position detection mechanism for detecting a touch position that is the touched position of the touch panel, a battery for supplying power to the display device in a state where no power is supplied from the outside, and a detection circuit for detecting at least one of disconnection and short circuit of itself, and a signal circuit for transmitting an output signal of the touch position detection mechanism. A flexible printed circuit board is formed, and at least one of a disassembly detection mechanism for detecting that the display device has been disassembled is provided. When the display device includes the flexible printed circuit board, when the control unit that controls the display device detects at least one of disconnection and short circuit of the detection circuit, it executes a predetermined anti-tamper process. When the display device includes the disassembly detection mechanism, the control unit executes the anti-tamper process when detecting that the display device has been disassembled. An information processing apparatus characterized by this. (2) The information processing apparatus according to (1), wherein the display device includes the flexible printed circuit board and the disassembly detection mechanism. (3) The control unit includes a CPU, and as the anti-tamper process, at least the operation of the CPU is stopped to make the CPU unusable. The information processing apparatus according to (1) or (2). (4) The main control unit that controls the information processing apparatus monitors the control unit, and when the control unit executes the anti-tamper process, notifies the upper control unit to which the main control unit is electrically connected that the anti-tamper process has been executed. The information processing apparatus according to any one of (1) to (3). (5) A control board on which the main control unit that controls the information processing apparatus is mounted, a second detection circuit for detecting at least one of disconnection and short circuit of itself is formed, and a printed circuit board that surrounds at least a part of the control board. A protection board, and a second disassembly detection mechanism for detecting that the information processing apparatus has been disassembled are provided. When the main control unit detects at least one of disconnection and short - circuit of the second detection circuit, it causes the control unit to execute the anti - tamper process, and when it detects that the information processing device has been disassembled, it causes the control unit to execute the anti - tamper process. The information processing device according to any one of (1) to (4), characterized in that.

[0049] In this aspect, it is preferable that the display includes a flexible printed circuit board and a disassembly detection mechanism. With this configuration, when at least one of disconnection and short - circuit of the detection circuit is detected, the anti - tamper process is executed, and when it is detected that the display has been disassembled, the anti - tamper process is also executed. Therefore, it is possible to further improve the safety of the display with a touch panel itself.

[0050] In this aspect, for example, the control unit includes a CPU, and as an anti - tamper process, at least the operation of the CPU is stopped to make the CPU unusable.

[0051] In this aspect, the main control unit that controls the information processing device monitors the control unit, and when the control unit executes the anti - tamper process, it is preferable to notify the upper - level control unit to which the main control unit is electrically connected that the anti - tamper process has been executed. With this configuration, it is possible to make the upper - level control unit recognize that the anti - tamper process has been executed in the display.

[0052] In this aspect, the information processing apparatus includes a control board on which a main control unit for controlling the information processing apparatus is implemented, a protection board which is a printed circuit board on which a second detection circuit for detecting at least one of disconnection and short circuit of itself is formed and which surrounds at least a part of the control board, and a second disassembly detection mechanism for detecting that the information processing apparatus has been disassembled. When the main control unit detects at least one of disconnection and short circuit of the second detection circuit, it is preferable to cause the control unit to execute a tamper-resistant process, and when it detects that the information processing apparatus has been disassembled, it is preferable to cause the control unit to execute a tamper-resistant process. That is, it is preferable that the control unit executes a tamper-resistant process even when an improper act on a part other than the display of the information processing apparatus is detected. With such a configuration, it becomes possible to further enhance the safety of the display with a touch panel itself.

Explanation of Signs

[0053] 2 Information processing apparatus 5 Liquid crystal display (display) 11 Main control unit 12 Control board 13 Detection circuit (second detection circuit) 14 Protection board 16 Disassembly detection mechanism (second disassembly detection mechanism) 22 Upper control unit 27 Touch panel 28 Control unit 31 Touch position detection mechanism 32 FPC (Flexible printed circuit board) 33 Battery 34 Disassembly detection mechanism 38 CPU 40 Detection circuit

Claims

1. It is equipped with a touch panel display into which confidential information is entered, The display device includes a touch position detection mechanism for detecting a touch position on the touch panel, and a battery for supplying power to the display device when no power is being supplied from an external source. The display device also includes at least one of a flexible printed circuit board on which a detection circuit for detecting at least one of a disconnection and a short circuit in the display device itself and a signal circuit for transmitting an output signal from the touch position detection mechanism is formed, and a disassembly detection mechanism for detecting that the display device has been disassembled. When the display device includes the flexible printed circuit board, a control unit that controls the display device executes a predetermined tamper-resistant process when detecting at least one of a disconnection and a short circuit in the detection circuit; When the display device is equipped with the disassembly detection mechanism, the control unit executes the tamper-resistant processing when it detects that the display device has been disassembled.

2. 2. The information processing apparatus according to claim 1, wherein the display comprises the flexible printed circuit board and the disassembly detection mechanism.

3. 3. The information processing apparatus according to claim 1, wherein the control unit includes a CPU, and as the tamper-resistant processing, the control unit stops at least the operation of the CPU to make the CPU unusable.

4. The information processing device according to claim 1 or 2, characterized in that a main control unit that controls the information processing device monitors the control unit, and when the control unit executes the tamper-resistant processing, notifies a higher-level control unit to which the main control unit is electrically connected that the tamper-resistant processing has been executed.

5. a control board on which a main control unit that controls the information processing device is mounted; a protection board that is a printed circuit board that surrounds at least a part of the control board and that has a second detection circuit formed thereon for detecting at least one of a disconnection and a short circuit in the control board; and a second disassembly detection mechanism for detecting that the information processing device has been disassembled; When the main control unit detects at least one of disconnection and short - circuit of the second detection circuit, it causes the control unit to execute the anti - tamper process. When it detects that the information processing apparatus has been disassembled, it causes the control unit to execute the anti - tamper process, the information processing apparatus according to claim 1 or 2, characterized in that.

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