A CAN industrial optical fiber encryption converter and its FPGA encryption algorithm implementation method

Abstract

The invention discloses a CAN industrial fiber encryption converter and a method for realizing an FPGA encryption algorithm thereof. The CAN industrial fiber encryption converter comprises a CAN information packet filter module, an FPGA encryption module and an OPT fiber engine module. The method for realizing the FPGA encryption algorithm comprises the steps of firstly judging the state of a CAN industrial bus when the CAN industrial fiber encryption converter is connected to the CAN industrial bus, automatically matching the CAN industrial bus, and after successful connection, receiving data information sent by the industrial CAN bus by the CAN fiber optic encryption converter; searching and judging whether the data information is complete CAN industrial bus information by the CAN industrial fiber encryption converter according to a data information content; if the detection is successful, then performing encryption package on the FPGA encryption module by the CAN industrial fiber encryption converter according to specifications and transmitting the data information to the OPT fiber engine module; and if the detection is unsuccessful, then blocking the data information by the CAN industrial fiber encryption converter. The CAN industrial fiber encryption converter and the method for realizing the FPGA encryption algorithm thereof provided by the invention can guarantee the data safety and high throughput.

Description

technical field [0001] The invention relates to the technical field of industrial information communication security, in particular to a CAN industrial optical fiber encryption converter and a method for realizing an FPGA encryption algorithm thereof. Background technique [0002] With the popularization of information technology and network technology in industrial systems, the security of industrial CAN bus application systems is a direct threat to industrial CAN bus systems. Currently, various industrial control firewalls on the market only implement industrial control protocols at the network layer. Due to the variety of industrial control protocols and the large differences in protocols, general industrial control firewalls perform protocol filtering at the application layer. The problem is that the performance is low and the security cannot be guaranteed. Data packets are easy to be tampered with. The security of information systems is a great threat. [0003] The nee...

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Problems solved by technology

[0002] With the popularization of information technology and network technology in industrial systems, the security of industrial CAN bus application systems is a direct threat to industrial CAN bus systems. Currently, various industrial control firewalls on the market only implement industrial control protocols at the network layer. Due to the variety of industrial control protocols and the large differences in protocols, general industrial control firewalls perform protocol filtering at the application layer. The problem is that the performance is low and the security cannot be guaranteed. Data packets are easy to be tampered with. The security of information systems is seriously threatened

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