Title:
METHOD, DEVICE AND EQUIPMENT FOR FILE ENCRYPTION
Document Type and Number:
WIPO Patent Application WO/2017/166856
Kind Code:
A1
Abstract:
A method, a device and equipment for file encryption, the method comprising: acquiring the memory size of a file to be encrypted (101); dividing, when the memory size is larger than a preset threshold, the file to be encrypted into N small blocks, N being an integer larger than 1 (102); encrypting M small blocks, among the N small blocks, in a first encryption manner, and encrypting the small blocks other than the M small blocks among the N small blocks in a second encryption manner, M being a positive integer smaller than N (103). Said method can encrypt a portion of a file to be encrypted in a first encryption manner, and encrypt the other portion in a second encryption manner, that is, encrypting the file to be encrypted using two encryption manners, increasing the difficulty of decrypting the file to be encrypted, thereby improving security.
Inventors:
HU ZHENJIE (CN)
Application Number:
PCT/CN2016/108929
Publication Date:
October 05, 2017
Filing Date:
December 07, 2016
Export Citation:
Assignee:
BEIJING KINGSOFT INTERNET SECURITY SOFTWARE CO LTD (CN)
International Classes:
G06F21/60
Foreign References:
| CN105893857A | 2016-08-24 | |||
| CN104205117A | 2014-12-10 | |||
| CN102693398A | 2012-09-26 | |||
| CN104091129A | 2014-10-08 | |||
| US20070028099A1 | 2007-02-01 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
Download PDF: