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Network data protection method based on FPGA

A technology of network data and data, which is applied in the direction of ring network, data exchange network, data exchange through path configuration, etc., can solve problems such as ring network paralysis, and achieve the effect of preventing network attacks

Active Publication Date: 2019-03-26
CHINA NUCLEAR CONTROL SYST ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If a node fails, the entire ring network will be paralyzed

Method used

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  • Network data protection method based on FPGA
  • Network data protection method based on FPGA
  • Network data protection method based on FPGA

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0032] An FPGA-based network data protection method, wherein the network is a multi-node communication network.

[0033] The composition of the multi-node communication network is as follows figure 1 As shown, the control station of the nuclear power plant safety-level DCS, the S-VDU, the transmission station and the gateway station equipment of the nuclear power plant all have at least one multi-node communication module and switching module. The combination of these two modules realizes the function of one node. The two nodes are connected in turn through two pairs of optical fibers to form a ring-shaped multi-node communication network.

[0034] The method includes the following steps:

[0035] (1) Physical layer reception

[0036] Two PHY chips, PHY1 and PHY2, are the physical layer of the ring network to which the node belongs; data sent by other node...

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Abstract

The invention relates to the technical field of system control, and specifically discloses a network data protection method based on FPGA. The method comprises the following steps of: (1) physical layer reception; (2) link layer reception; (3) acquisition of ring network node attribute information; (4) packet filtering and flow control; (5) node culling; (6) data storage; (7) data transmission. The method of the invention can effectively prevent network attacks and realize functions such as flow control and node culling.

Description

Technical field [0001] The invention belongs to the technical field of system control, and specifically relates to an FPGA-based network data protection method. Background technique [0002] In the nuclear power plant safety-level DCS reactor protection system, data communication between devices will adopt the form of nodes to form a ring multi-node communication network. The communication data packets between all nodes follow the custom data format protocol. The current mainstream network security architectures are IPS (Intrusion Prevention System, Intrusion Prevention System) and IDS (Intrusion Detection System, Intrusion Detection System). The former is located between the firewall and the network equipment. It determines whether it is under attack by matching rules in the database, and prevents this malicious communication before the attack spreads to other parts of the network; the latter is a monitoring device, which is generally connected to All concerned traffic must fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/437H04L12/42H04L29/06
CPCH04L12/42H04L12/437H04L63/0227H04L63/12
Inventor 吴兵伟刘志凯王冬胡义武郭震梁成华魏涛涛赵爽
Owner CHINA NUCLEAR CONTROL SYST ENG
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