Microprocessor firmware information protection method based on information encryption

Abstract

The invention discloses a microprocessor firmware information protection method based on information encryption, and the method comprises the steps that a microprocessor reads an operation mark, and judges that the microprocessor is not operated for the first time; the encryption sequence is read, the starting frequency and the unique serial number are decrypted, and the decrypted serial number and the decrypted starting frequency are compared with a standard value; according to the comparison result, the microprocessor is normally started, the internal control logic adds one to the number oftimes of starting, and the unique serial number and the number of times of starting are encrypted again and stored dispersedly, or the microprocessor crashes. According to the method, an improved symmetric encryption algorithm is adopted, encryption of a unique algorithm and storage in a specific form are carried out based on a unique serial number of the microprocessor, a software system first-time starting mark and data of a software system starting frequency value, and the purpose of protecting firmware information of the microprocessor is achieved; when the method is applied to productionapplication with limitation on the starting frequency of the microprocessor, the firmware information of the microprocessor can be prevented from being maliciously read, tampered and copied.

Description

Technical field: [0001] The invention relates to the field of computer information, in particular to an information encryption-based microprocessor firmware information protection method. Background technique: [0002] With the development of information technology, as the carrier of information, microprocessors are used more and more, followed by users' higher and higher requirements for the confidentiality of microprocessor content. How to protect the microprocessor firmware The problem of information content, that is, the issue of confidentiality of information content is becoming more and more important. It is usually necessary to take certain measures to ensure the security of the internal information of the microprocessor, protect the firmware data of the chip, prevent unauthorized access or copy the program inside the chip, and perform mass copying. Currently, hardware encryption and software encryption are widely used. Hardware encryption usually uses chips with en...

AI Technical Summary

Problems solved by technology

The encryption performance of the hardware encryption scheme is strong, but the hardware cost needs to be considered, and the common software encryption algorithm has the problem of poor encryption performance

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