USB insertion detection, physical-layer breaking method, safe computer and financial information safety system

A technology of safe computer and detection method, which is applied in the electronic field and can solve problems such as threats to local area network network security data security

Inactive Publication Date: 2017-05-31
杭州厚谋创意设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Use anti-virus software to control the safe transmission of USB data in the LAN, but some stubborn viruses breed in the USB storage device, which seriously threatens the network security and data security of the LAN

Method used

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  • USB insertion detection, physical-layer breaking method, safe computer and financial information safety system

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1, in figure 1 A physical disconnection device includes a network card chip U1, a network interface, a USB interface, a PNP phototransistor Q1, a pull-down resistor R1, a light emitting diode D1, and a current limiting resistor R2.

[0018] Light-emitting diode D1, current-limiting resistor R2, phototransistor Q1, and pull-down resistor R1 together form a photogate. Phototransistor Q1 is located on the left side of the USB interface, and light-emitting diode D1 is located on the right side of the USB interface. The light emitted by the light-emitting diode D1 passes through the USB interface. The interior shines on the phototransistor Q1.

[0019] The output pin of the photogate is connected to the reset pin of the network card chip U1.

[0020] When the USB device is plugged in, the light emitted by the LED D1 is blocked, the phototransistor Q1 cannot receive the light from the LED D1, and enters the cut-off state, the level of the output pin of the photoga...

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Abstract

The invention relates to the field of information safety. According to a USB insertion detection mode, detection is carried out through an opposite-type photoelectric door, and a light path penetrates through the inside of a USB interface. According to a physical-layer breaking method, a reset pin of a network card chip is controlled, and network breaking of the network card chip on a physical layer is achieved. According to a physical network-breaking achieving device, the USB state is detected through the USB insertion detection mode; control of the on-off state of a network is achieved with the physical-layer breaking method; the using state of the USB interface and control of a network interface are correlated through an electric circuit. The physical network-breaking achieving device is used in the safe computer. The safe computer is used in the information safety system. By means of the USB insertion detection mode, the physical-layer breaking method, the safe computer and the information safety system, insertion of a USB device can be detected in real time, network breaking on the physical layer is achieved, and it can be avoided that attacking of the network of a USB device virus can be avoided when antivirus software is failed.

Description

technical field [0001] The invention belongs to the field of electronics, and in particular relates to USB insertion detection, a physical layer fault method, a safety computer, and an information safety system. Background technique [0002] With the emergence and development of USB storage devices, people's security requirements for paperless office and large-capacity storage devices are increasing day by day. [0003] While USB storage devices bring us convenience, they also provide opportunities for illegal access to computer data, copying and leaking or sensitive data. Security vendors such as anti-virus software mainly protect against viruses for reading and writing data on USB storage devices, but they cannot prevent the occurrence of file theft. If there is a technology that can cut off the network when the USB storage device is inserted, it can prevent important files in the USB storage device from being stolen. [0004] Anti-virus software is used in the LAN to co...

Claims

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Application Information

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IPC IPC(8): G06F21/85G06F21/56H04L12/12
CPCG06F21/85G06F21/568H04L12/12
Inventor 李堂忠张枫轩何肖平徐健徐昌华
Owner 杭州厚谋创意设计有限公司
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