Encryption and decryption algorithm for excel file and file protection method
An encryption and decryption, file technology, applied in the field of encryption and decryption of excel files and file protection, to achieve the effect of protecting personal privacy
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[0016] The present invention uses utf-8 encoding and decoding, uses original encryption and decryption algorithms, and designs corresponding interfaces according to specific application scenarios and original application ideas, which is convenient for operation, and the specific contents are as follows:
There are titles and the information corresponding to the titles in the excel file. The only attribute is the number. The title position flage of the number needs to be manually entered according to the information in the excel file. For example, flage="F2", then the F column is the column where all numbers are located. If the number of lines is greater than or equal to 3, the number and all titles do not need to be encrypted, and the rest of the information is encrypted to realize the file protection function. A key is randomly set for each number, and the setting of the key is guaranteed to be irregular, its degree and size All are inconsistent, the key consists of a number, ...
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