Document encrypting method and document decrypting method on basis of voice print

Abstract

The invention relates to a document encrypting method on the basis of a voice print, which comprises the following steps that: (1) a user remembers a key; (2) the user says a sentence by voice randomly, and a key is extracted from characteristic parameters of the voice print of the voice as an encrypted key; (3) a symmetric encryption algorithm is selected, the key extracted in the step (2) is used to encrypt a document, an intermediate document is generated, a random text string in the step (2) and the intermediate document are packed together to generate a novel document; and (4) the key remembered by the user is used to encrypt the document in the step (3) to form an encrypted document. A voice print document decrypting method comprises the following steps that: (1) the selected symmetric encryption algorithm and the key remembered by the user are used to generate a temporary document; (2) a text string correlative with the encrypted key of the document is separated out from the temporary document and the user says the text string by voice and extracts a key from the characteristic parameters of the voice print of the voice; and (3) the temporary document is decrypted by the key extracted in the step (2) and the selected symmetric encryption algorithm to complete decrypting the document. The document encrypting method and the voice print document decrypting method provided by the invention are convenient to use and have high safety.

Description

technical field [0001] The invention belongs to the technical field of computer information security document protection, and in particular relates to a voiceprint-based file-by-file-encryption encryption and decryption method. Background technique [0002] At present, a large amount of private and important information in people's work and life is generally stored in personal computers or file servers in the form of electronic documents. As we all know, electronic documents themselves are vulnerable to network attacks, and their existence is stolen, destroyed, and distributed without authorization. Waiting for danger. Therefore, it is particularly important to encrypt and protect documents. [0003] Document encryption generally adopts symmetric encryption methods (such as AES, 3DES, etc.), and under the condition that the number of key bits is long enough, document encryption itself can be considered safe in daily use. It is difficult for a stealer to directly crack the ...

AI Technical Summary

Problems solved by technology

This method is the safest and most convenient in theory, but people have limited ability to memorize the key. In actual use, it is often "one code pass". security is not high

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