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A file security protection method based on file fragmentation and encryption

A security protection and encryption algorithm technology, which is applied in the field of document security protection based on file fragmentation and encryption, can solve the problems of encryption algorithm restoration, illegal acquisition of document keys, etc., and achieve the effect of solving leaks

Active Publication Date: 2016-11-30
BEIJING CHERILEAD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a document security protection method based on file fragmentation and encryption. Through document fragmentation, reorganization, distributed storage and other technologies, it solves the problems of exhaustive enumeration of documents, illegal acquisition of keys, and restoration of encryption algorithms after being cracked. question

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  • A file security protection method based on file fragmentation and encryption
  • A file security protection method based on file fragmentation and encryption
  • A file security protection method based on file fragmentation and encryption

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Embodiment Construction

[0025] The main innovation in the file security protection method based on file fragmentation encryption provided by the present invention is the document fragmentation and reorganization technology: traditional encryption systems use keys and encryption algorithm strengths to ensure the security of encrypted data. Based on the traditional encryption method, the present invention introduces "ciphertext fragmentation" technology to further enhance the security of file access. The basic idea of ​​"ciphertext fragmentation" technology is: use the document fragmentation algorithm to fragment the original file A into file header A0 and multiple ciphertext fragments A1, A2...An, and store A1, A2...An in the user terminal and the dedicated server respectively superior. No matter which fragment is obtained, it is very difficult to restore the original information from it. When the user opens the file and clicks the file header A0 on the user terminal, the system authenticates the use...

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Abstract

The invention relates to a file security protection method based on file fragmentation and encryption, comprising the following steps: fragmenting an original file into fragments of indefinite length through a filter drive according to a specific fragmentation algorithm, and using an encryption algorithm for each fragment according to an encryption strategy to perform transparent After encryption processing, the ciphertext fragments are stored in the fragment cloud storage server. The beneficial effects of the present invention are: because there is no original document in any form (encrypted or non-encrypted) locally, the possibility of restoring the original document from incomplete ciphertext fragments is almost zero, which fundamentally solves the problem of client leakage The problem.

Description

technical field [0001] The invention relates to the technical field of computer information security, in particular to a file security protection method based on file fragmentation and encryption. Background technique [0002] Document security technology is generally divided into two types: one is access control, which restricts only users with specific permissions to read and write electronic documents under the relevant permissions through software and hardware, but once an illegal intruder obtains this permission, it can also be used as Normal users can also obtain confidential files on the computer; the other is data encryption, which encrypts confidential data into ciphertext by certain means, so that even if it is obtained by illegal intruders, the real content of the file cannot be read. The message is protected. Encryption software has been widely used in major enterprises and institutions to protect internal confidential files, but traditional encryption software ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
Inventor 丁凯
Owner BEIJING CHERILEAD TECH