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Methods and devices for ciphering and deciphering file

An encryption method and encryption key technology, applied in the field of encryption device, decryption method, file encryption method, and decryption device, can solve the problems that files are easy to be cracked, achieve the effect of not being easy to crack, and improve the security level

Inactive Publication Date: 2013-10-02
DAWNING CLOUD COMPUTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem in the related art that the password input by the user is used to encrypt a random key through the AES algorithm, and the method of encrypting a file with the key is too simple, and the encrypted file is easy to be deciphered, the present invention proposes a file encryption method, decryption The method, the encryption device, and the decryption device can improve the security degree of file encryption and make encrypted files difficult to be cracked

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  • Methods and devices for ciphering and deciphering file
  • Methods and devices for ciphering and deciphering file
  • Methods and devices for ciphering and deciphering file

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0047] According to an embodiment of the present invention, a file encryption method is provided.

[0048] like figure 1 As shown, the encryption method includes:

[0049] Step S101, obtaining a mixed key according to a predetermined encryption key and a user key input by the user;

[0050] Step S103, using the mixed key to encrypt the file to be encrypted, and using the public key in the predetermined key pair to encrypt the mixed key to obtain the encrypted mixed key;

[0051] Step S105,...

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Abstract

The invention discloses methods and devices for ciphering and deciphering a file. The ciphering method comprises the steps as follows: a mixed key is obtained according to a preset ciphering key and a secret key input by a user; the to-be-ciphered file is ciphered according to the mixed key, and the mixed key is ciphered according to a public key aligned by the preset key, so that a ciphered mixed key is obtained; and the ciphered mixed key and the ciphered file are saved. The file and the mixed key are ciphered twice, so that the safety degree for the file ciphering can be improved, and furthermore, the ciphering method based on USBkey is safer, more convenient and rapider.

Description

technical field [0001] The present invention relates to the field of file encryption and decryption, and in particular, to a file encryption method, decryption method, encryption device, and decryption device. Background technique [0002] Many times we share a computer with others. In order to protect our privacy or confidential files, we need to encrypt the files to achieve the purpose of protection. [0003] The existing file encryption method flow is as follows: [0004] 1. Randomly generate an n-bit encryption key for the file to be encrypted. The user enters the encryption and decryption password, uses this password to encrypt the random key through the AES algorithm, and saves the encrypted random key in the file header. [0005] 2. Encrypt the file with a random key. [0006] Using the password entered by the user to encrypt a random key through the AES algorithm, and using this key to encrypt files is too simple, and the encrypted file is easily cracked. [0007]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06H04L9/30
Inventor 王帅孙洪涛田勇邵宗有
Owner DAWNING CLOUD COMPUTING TECH CO LTD