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Text information hiding method and device

A text information and file technology, applied in the field of information hiding, can solve problems such as data loss, and achieve the effect of high concealment and robustness

Active Publication Date: 2015-04-29
NEW FOUNDER HLDG DEV LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Since the RSA encryption method is used, if some data in the hidden text information is destroyed, other data in the text information is likely to be lost

Method used

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  • Text information hiding method and device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0042] The technical idea of ​​this embodiment is to change the glyph index corresponding to the character code by changing the position of the glyph description data in the font file, thereby changing the mapping relationship between the glyph index and the character code.

[0043] figure 1 is a flow chart of the text information hiding method according to the first embodiment of the present invention.

[0044] Such as figure 1 As shown, first, in step S101, the original font file used by the text information to be hidden is acquired.

[0045] Next, a new font file is generated based on the original font file. Specifically, first, in step S102, the position of the font description data in the original font file is adjusted. Here, the adjustment method can be adjusted according to a predetermined rule (for example, in reverse order), or it can be adjusted randomly. Then, in step S103, the glyph index corresponding to the character code in the glyph index character code mapp...

no. 2 example

[0076] The technical idea of ​​this embodiment is to change the mapping relationship between the glyph index and the character code by changing the character code corresponding to the glyph index in the glyph index character code mapping table, while the position of the glyph description data in the font file does not change .

[0077] figure 2 is a flow chart of the text information hiding method according to the second embodiment of the present invention.

[0078] Such as figure 2 As shown, first, in step S201, the original font file used by the text information to be hidden is acquired.

[0079] Next, a new font file is generated based on the original font file. Specifically, in step S202, the character code corresponding to the glyph index in the glyph index character code mapping table in the original font file is modified, thereby generating a new font file.

[0080] Next, the text information to be hidden is written into the electronic document based on the new fon...

no. 3 example

[0101] This embodiment is an application example of the first embodiment and the second embodiment. In this example, applying the text information hiding method according to the first embodiment or the second embodiment of the present invention to a library mainly includes the following three steps:

[0102] (1) Font file creation

[0103] According to the requirements of the library, the font file is modified according to the text information hiding method of the first embodiment or the second embodiment, and a proprietary font file is generated.

[0104] (2) Electronic document production

[0105] Generate documents that need to be made public based on the proprietary font files you have created.

[0106] (3) Viewing electronic documents

[0107] Such as image 3 As shown, users can read electronic documents displaying correct text information on the library's machines, or obtain and install proprietary font files through the network to view correct text information. If...

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Abstract

The invention provides a text information hiding method, which includes: acquiring an original font file used by to-be-hidden text information, generating a new font file by rectifying mapping relation between font index and character codes in the original font file; rectifying the text information according to the new font file, writing the rectified text information into an electronic document; acquiring font description data of characters in the text information from the new font file when the electronic document is opened, and displaying the text information according to the acquired description data. Correspondingly, the invention further provides a text information hiding device, character codes of the text information cannot be changed and any encryption method is omitted, effect of hiding the text information can be realized simply, and safety, hiding performance and robustness are high.

Description

technical field [0001] The invention relates to the technical field of information hiding, in particular to a text information hiding method and device. Background technique [0002] With the rapid development of computer network technology and multimedia all over the world, electronic information is increasing at an explosive rate, and the accompanying issues such as the safe transmission of information have become particularly important. However, text information accounts for the vast majority of all electronic information. If secret text information is stolen, related documents, works, software, etc. will be stolen, infringed, and sometimes may cause major economic losses. [0003] Based on this problem, some text information hiding methods have emerged to protect secret text information from being destroyed. Text information hiding is a method of hiding secret text information in electronic documents to prevent opponents from discovering it, mainly including steganograp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/62G06F21/60
Inventor 丁力王晓磊张磊
Owner NEW FOUNDER HLDG DEV LLC
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