A method to enhance the security of secondary radar fpga

Abstract

The invention discloses a method for enhancing the safety of a secondary radar FPGA (Field Programmable Gate Array) and relates to the design scope of the safety of the FPGA. The method comprises the following steps of: after the FPGA loads a configuration file, firstly, reading an ID (Identity) of hardware; secondly, reading a check code in a memory; finally, deciphering the check code and then comparing the deciphered check code with the ID; if the deciphered check code is consistent with the ID, executing a normal function; otherwise, starting a reconfiguration command; after the FPGA is reconfigured, firstly encrypting the read ID and then storing the encrypted ID on an ISF (Information System Finishing); and deleting the configuration file used in a reconfiguration process. According to the method disclosed by the invention, a resource of the FPGA is sufficiently utilized and a design cost is reduced; and a method for binding the ID of the hardware and monitoring a JTAG interface is adopted so as to prevent a secondary user from conducting reverse engineering, cloning and the like on the FPGA. Furthermore, the space occupancy rate and the power consumption are obviously improved. Currently, the design scheme is used in certain secondary radar equipment and the function is stable and reliable.

Description

technical field [0001] The invention relates to the safety design category of FPGA, in particular to a method for enhancing the safety of secondary radar FPGA. Background technique [0002] The secondary radar is a secondary radar designed and manufactured by our company for some countries with the function of identifying friend or foe in the western system. The number of secondary radars is generally small, and the field maintenance must be upgraded or improved according to the actual situation and the requirements of the foreign party, so it has high requirements for design cost and hardware flexibility. In addition, in order to protect the interests of the enterprise itself and even the country, it is necessary to prevent reverse engineering, over-construction and cloning of key technologies (modules) by unauthorized parties. According to the characteristics of secondary radar, we choose XC3S700AN ​​for FPGA (encoding module) design. XC3S700AN ​​is a kind of Spartan3AN ...

AI Technical Summary

Problems solved by technology

The number of secondary radars is generally small, and the field maintenance must be upgraded or improved according to the actual situation and the requirements of the foreign party, so it has high requirements for design cost and hardware flexibility

In the long run, the benefits obtained are obvious, but for the designer, it is the loss of economic benefits such as maintenance costs and later spare parts

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