Electronic document security device

Abstract

The invention discloses an electronic document security device. The device comprises a code generation module, an encryption / decryption module, a code loading module, a code storage module, and a computer with an editing device, wherein the code storage module can store more than one encrypted code table; each encrypted code table is generated previously or immediately by the code generation module according to character codes in a universal code table; and the encrypted code table is irregular, i.e., the coding codes in the encrypted code table have no mathematical rule with the character codes. The electronic document security device has the advantages of extremely high security, safety, convenience and generality.

Description

Security device for electronic documents technical field The invention relates to electronic documents, in particular to a security device for electronic documents. Background technique Documents contain a large number of language symbols, or "characters". In order to protect the content of the plaintext document from being illegally obtained, the characters in the document need to be encrypted. Traditional encryption methods can be divided into two categories: regular and irregular. The regular encryption method is to transform the characters in the plaintext to obtain the ciphertext according to certain rules or rules, so as to achieve the purpose of encryption. The biggest disadvantage of this method is that theoretically any regular encryption method can be cracked through mathematical operations. The random encryption method is an encryption method that replaces another character with a code, and there is no inherent mathematical law in the correspondence between ...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the regular method is that the confidentiality is not strong enough. In theory, as long as there is a computer with a fast enough operation speed, any regular encryption method can be cracked through computer operations.

In addition, if the language environment of the computer system used for encryption and decryption is not the same or the code tables used by the encryptor and decryptor are inconsistent, the decrypted document may not be displayed normally

For example, for a piece of Chinese civilized text, if the Chinese version of the Linux operating system is used to obtain the ciphertext when encrypting, and the Japanese version of the Windows system is used for decryption, the original plaintext may not be displayed normally after decryption

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