Method and system for generating digital watermark-based safe word stock

A technology of digital watermarking and generation algorithm, applied in the field of information security, can solve the problem of document security cannot be guaranteed, and achieve the effect of protecting illegal copying
CN101833747AInactive Publication Date: 2010-09-15SHENZHEN Y& D ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN Y& D ELECTRONICS CO LTD
Publication Date
2010-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and a system for generating a digital watermark-based safe word stock. The safe word stock is used for establishing a user document which exclusively belongs to a user, and the method is characterized by comprising the following steps of: step S1, determining a sub-word stock which needs to be embedded with a digital watermark in an original work stock set according to the requirement of creating a document; step S2, forming watermark information based on authentication information; step S3, generating the digital watermark by using a watermark generation algorithm based on the sub-word stock, the watermark information and a key; and step S4, embedding the digital watermark into the sub-word stock by using the watermark embedding algorithm and generating the safe word stock comprising the digital watermark. The user can input characters by using the unique safe work stock so as to generate the unique document per se; and a watermark signal comprising the specific information of the user is embedded into the documents and can be extracted, so that the documents are protected from being copied illegally.
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Description

technical field

[0001] The invention relates to the technical field of information security, in particular to a method and system for generating a digital watermark-based security font library. Background technique

[0002] The font library is an important part of the computer operating system. The font library stores a collection of each character glyph, which defines the shape of the text output, the maximum resolution, and so on. When performing computer text output, first, according to the internal code of the text, find the glyph from the font library after calculating the index, then define the output size and resolution through the output device, and finally display the font output on the media.

[0003] At present, commonly used fonts can be divided into dot matrix fonts and vector fonts in terms of glyph description technology. The principle of the dot matrix font library is to establish a certain rectangular area for each character, and divide this area into m×n e...

Claims

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