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Intrusion prevention device, intrusion prevention method, and program

A technology of illegal intrusion and instruction, applied in computer security devices, data exchange through path configuration, instruments, etc., can solve problems such as damage to infrastructure, user or user personal danger, etc., to reduce the time required, reduce delayed effect

Active Publication Date: 2020-04-21
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in the field of OT, the control device controls the control target device by sending a command as a packet (Packet). It is assumed that the damage to the important infrastructure itself, such as the transmission of instructions, will bring danger to the user or the user's body

Method used

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  • Intrusion prevention device, intrusion prevention method, and program
  • Intrusion prevention device, intrusion prevention method, and program
  • Intrusion prevention device, intrusion prevention method, and program

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Embodiment Construction

[0027] Hereinafter, embodiments of the present invention will be described in detail. In addition, components having the same functions in the drawings are denoted by the same reference numerals, and repeated explanations are omitted.

[0028] Such as figure 1 As shown, the illegal intrusion prevention system of the embodiment includes a control device 1, at least one controlled device 2-n (n=1, 2, ..., n is an integer greater than 1), an illegal intrusion prevention device 3 and a security monitoring device 4. The control device 1 and the control target device 2 - n are respectively connected to a communication network 9 - 1 . The intrusion prevention device 3 is configured as a network device constituting the communication network 9 - 1 and is connected to the communication network 9 - 2 , and the communication network 9 - 2 is physically or logically separated from the communication network 9 - 1 . The safety monitoring device 4 is connected to the communication network ...

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PUM

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Abstract

The present invention reduces the time required for inspecting packets and detecting unauthorized commands. An intrusion prevention device (3) is connected to a communication network (9-1) over whichpackets including commands to a device to be controlled are transmitted according to a predetermined rule. An analysis table storage unit (34) stores an analysis table constituted by a predetermined number of slots for storing a predetermined number of commands together with time information. An input unit (31) extracts commands from packets detected from the communication network (9-1). A parse unit (32) inserts the commands into the analysis table. An analysis unit (33) analyzes whether or not the plurality of commands stored in the respective slots of the analysis table are in accordance with the predetermined rule. A notification unit (35) outputs an alarm when the analysis result indicates an abnormality. An output unit (36) determines whether to let packets pass through or discard the same in accordance with the analysis result.

Description

technical field [0001] The present invention relates to techniques for preventing illegal intrusion into industrial systems utilizing social infrastructure such as electricity, gas, waterways, chemicals, petroleum, and the like. Background technique [0002] In the field of Internet technology (hereinafter referred to as "IT"), so-called malicious software or distributed denial of service attack (DDoS: Distributed Denial of Service, distributed denial of service) network attack, illegal intrusion detection system (IDS: Intrusion Detection System) and illegal intrusion prevention system (IPS: Intrusion Prevention System), firewall (FW: Firewall) and other security technologies developed. These security technologies are incorporated into operational technologies (hereinafter referred to as "OT") for operating and controlling various social infrastructures. [0003] In the field of IT, all the information in the network is regarded as information assets, and the purpose of sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/55H04L12/28
CPCG06F21/566H04L63/1466G06F21/554H04L63/1416H04L63/20
Inventor 冈部惠一伊藤宏树
Owner NIPPON TELEGRAPH & TELEPHONE CORP