Circuit system design encryption circuit and encryption method thereof

Abstract

The invention discloses a circuit system design encryption circuit and an encryption method thereof. The encryption circuit comprises an FPGA and a CPU, wherein the CPU is connected with the FPGA through an address bus and a data bus; when the system is electrified, the configuration data bit stream in the FPGA is transmitted between the FPGA and an external memory; the circuit system design encryption circuit also comprises an encryption module connected with the FPGA; the encryption module comprises an algorithm engine and a corresponding key is stored in the encryption module; an algorithmmodule is also embedded in the FPGA and a key matched with that in the encryption module is also included in the FPGA; when the system is electrified, the FPGA reads the calculation result from the encryption module, compares the calculation result with that of the algorithm module in the FPGA and the user design is used if the results are matched with each other, if not, the user design is not used. The encryption design of the circuit is realized through an economic and reliable method so as to effectively prevent imitation of competitors and protect the interests per se.

Description

technical field [0001] The present invention relates to a kind of circuit system design encryption circuit and its encryption method, especially relate to a kind of circuit and its encryption method that uses encryption circuit to encrypt the FPGA (Field Programmable Gate Array, Field Programmable Gate Array) design of circuit, prohibit The competitor cracks the design data of the circuit by capturing the configuration data bit stream transmitted between the FPGA and the external memory, and the invention can also be used for the encryption circuit design and encryption method of electronic circuits in similar fields. Background technique [0002] After the new product is developed and put into use, once the competitors feel that it is profitable, they will do everything possible to steal the technical secrets, and even directly use the method of copying the product to imitate the product, which seriously affects the interests of the designer. At the same time, the technolog...

AI Technical Summary

Problems solved by technology

However, for FPGAs that do not have embedded bitstream encryption to encrypt the configuration bitstream, an additional step in the production process is required to program the key in the FPGA, thus increasing the cost

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