Data file protecting method and device

A data file and protection system technology, applied in the field of information security, can solve the problems of easy leakage of data information, increase the difficulty of debugging and cracking, prevent memory DUMP, and improve execution efficiency

Active Publication Date: 2014-03-05
BEIJING SENSESHIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In view of this, the present invention provides a method and device for protecting data files, so as to solve the potential safety hazard that data information in storage devices is easily leaked

Method used

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  • Data file protecting method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] image 3 It is a flow chart of the preferred embodiment 1 of a data file protection method according to the present invention.

[0107] see image 3 , the host operating system in this embodiment is Windows, the data file to be protected is a text file a.txt with an extension name of .txt, and the application program associated with the text file is stored in the registry of the Windows system as NOTEPAD. Program), assuming the path is C:\Windows\System32\NOTEPAD.EXE, the naming format of the data file written in the U disk part of the U disk dongle is: file name + "_" + "encryption algorithm keyword (such as AES) "+"."+"file extension". According to an embodiment of the present invention, the protection method of this data file comprises:

[0108] 1. Select the AES encryption scheme through the writing device to write the data file a.txt into the public area of ​​the U disk part of the U disk dongle, and the data file written into the U disk part of the U disk dongl...

Embodiment 2

[0117] Figure 4 It is a flow chart of the preferred embodiment 2 of a data file protection method according to the present invention.

[0118] see Figure 4 , the difference between embodiment 2 and embodiment 1 lies in step 1 and step 2, and step 1-2 of this embodiment is:

[0119] 1. The key information of all encryption schemes written to the device is preset in the storage area of ​​the dongle part of the U disk dongle;

[0120] 2. Select the AES encryption scheme through the writing device to write the data file a.txt into the public area of ​​the U disk dongle, the file name remains unchanged, and at the same time generate a mapping table of the corresponding relationship between the data file and the encryption algorithm in the U disk dongle;

[0121] The remaining steps are similar to Example 1, including:

[0122] 3. Connect the set U disk dongle to the host, and automatically run the execution device;

[0123] 4. Execute the double-click or Enter key operation o...

Embodiment 3

[0131] Figure 5 It is a flow chart of the preferred embodiment 3 of a data file protection method according to the present invention.

[0132] Such as Figure 5 As shown, the operating system of this embodiment is Windows, and the data file is a file (i.e. a word file) with an extension of . System32\WINWORD.EXE. According to an embodiment of the present invention, the data file protection method includes:

[0133] 1. Select the DES encryption scheme through the writing device to write the data file b.doc into the hidden area of ​​the U disk in the U disk dongle, and at the same time generate a mapping icon for the content of the data file stored in the hidden area in the password area of ​​the U disk. Assuming that the icon name is still b.doc, the map icon attribute stores the location of the data file content stored in the map hidden area;

[0134] 2. The writing device writes the DES encryption key DES_KEY into the storage area of ​​the dongle part of the U disk dongl...

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Abstract

The invention discloses a data file protecting method and device, and belongs to the field of information safety. The device comprises a writing-in device, an executing device and a USB flash disc encrypted lock. According to data file protecting method and device, a data file to be protected is written in the USB flash disc encrypted lock through encryption, the executing device monitors the double-click operation or the Enter key operation of the data file in the USB flash disc encrypted lock, an application program related to a file type set by the system in a default mode is searched in a current operation system according to the file type of the data file, the application program is operated in a debugger mode, the executing device decrypts the data file, and the data file is opened by using the operating application program. According to the data file protecting method and device, the data file only needs to be stored in the USB flash disc encrypted lock, then the application program related to the data file in the system is operated in the debugger mode, the data file is decrypted and opened, the information leakage caused by random copying of the data file can be prevented, safety is improved, the space of the USB flash disc encrypted lock can be further saved, and operating efficiency can be improved.

Description

technical field [0001] The invention relates to the field of information security, in particular to a data file protection method and device. Background technique [0002] U disk (USB Flash Disk), the full name of USB flash drive. It is a miniature high-capacity mobile storage product that uses a USB interface and does not require a physical drive. It is connected to a computer through a USB interface to achieve plug and play. Because the U disk has the characteristics of small and exquisite, easy to carry, large storage capacity, fast speed, and small size, it is more and more widely used in daily life and work. [0003] Ordinary U disk is a transparent mobile storage media device, there is no access control for data access, as long as the access party with USB interface can use it without hindrance. Therefore U-disk brings convenience to people, but also brings an important problem: information leakage. [0004] The reasons for U disk information leakage mainly include:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62
CPCG06F21/6209G06F2221/2107
Inventor 不公告发明人
Owner BEIJING SENSESHIELD TECH
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