Method for generating and using encrypted tamper-proof file

Abstract

The invention discloses a method for generating and using an encrypted tamper-proof file, which comprises the following steps of: introducing an authorization information code when an application writes a file, backing up an original file, carrying out grouping encryption on the original file and a backup file, carrying out abstract calculation on encrypted groups, and generating an abstract; and finally, splicing each encrypted group, the abstract and the encrypted authorization information code to form an encrypted tamper-proof file. During use, an application brings in authorization information codes to access a file, a file system encrypts the authorization information codes through a digest algorithm, compares an encryption result with the encrypted authorization information codes of the file, allows access if the encryption result is consistent with the encrypted authorization information codes of the file, denies access if the encryption result is not consistent with the encrypted authorization information codes of the file, performs tamper-proof verification on the double areas in groups if the access is allowed, and if a certain group fails in verification, restoration is performed by a corresponding group passing by verification in an other area. Finally, a group passing verification is decrypted to acquire an original file. The file can realize the functions of file integrity, safety, authorized access and recoverability by themselves.

Description

technical field [0001] The invention relates to the technical field of embedded industrial control and information security, in particular to an encryption and tamper-proof file generation and use method for power secondary equipment data files. Background technique [0002] With the rapid development of information technology, more and more files are stored on computers and servers, and a large amount of important data is stored in the system in the form of files in plain text. However, at the same time, the attack methods against files are also constantly evolving, causing data loss, leakage, system crashes and other problems. How to ensure the safety of important documents is a problem that people have been paying close attention to all the time. [0003] With the rapid development of power grid construction, the system structure of the power grid is becoming more and more complex. The safe and stable operation of the power grid is an important factor related to the nati...

AI Technical Summary

Problems solved by technology

[0007] Purpose of the invention: The purpose of the present invention is to provide a method for generating and using encrypted and tamper-proof files for power secondary equipment data files, through which functions such as file integrity, security, authorized access, and recovery can be completed through the file itself. It can solve the problems of complex file access authorization process in the existing technology, high resource consumption for file tampering monitoring, inaccurate positioning of tampered content, and additional backup space required for file recovery

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