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Digital watermarking infrastructure

An infrastructure and digital watermarking technology, applied in the direction of electrical digital data processing, digital data processing components, instruments, etc. The effect of reducing requirements

Inactive Publication Date: 2008-10-22
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system does not technically solve the key problem of how to find illegal copies, and the system is too complicated, and the cost of implementation increases accordingly

Method used

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  • Digital watermarking infrastructure
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Examples

Experimental program
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Embodiment Construction

[0034] exist figure 1 The relationship between the three entities in the whole system is revealed in the paper. There are two CA-signed watermarks embedded in the legal digital works purchased by users, one is used to identify the publisher (copyright information), and the other is used to identify the buyer (digital information). Fingerprint); when an illegal copy of a digital work is discovered through a mobile agent or storage medium, it can be determined who is carrying out the illegal transmission based on the two extracted watermarks, providing evidence for tracing the illegal copy. Among them, the copyright information watermark includes the publisher ID and the work ID, the digital fingerprint watermark includes the buyer ID, and the two watermarks are random sequences generated by the corresponding ID signed by the CA as a seed.

[0035] figure 2 Indicates the copyright information generation process. The publisher RH who wants to register the copyright calculates ...

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Abstract

The present invention discloses basic watermark facility, and is one digital work copyright protecting system based on digital watermark. The user purchased legal digital work has two CA signature watermarks embedded, one identifying the publisher and the other identifying the purchaser. When illegal copying is found out with the network detector or memory medium based on movable deputy, the illegal propagator may be determined based these two watermark. The copyright information watermark of the publisher includes the publisher ID and the work ID, the digital fingerprint of the purchaser includes the purchaser ID, and these two watermarks are random sequence produced with the corresponding ID and through CA signature. The present invention uses the correlated concept of PKI system for tracing illegal copying and is simple, practical, reliable and expandable.

Description

technical field [0001] The invention belongs to the field of copyright protection, and in particular relates to a system construction method for digital works copyright protection and illegal copy tracking by using digital watermark technology. Background technique [0002] The prevalence of Internet technology, especially the advancement of multimedia storage and transmission technology, has brought about the rapid growth of digital media applications. The digitization of multimedia data provides great convenience for the access of multimedia information, and also greatly improves the efficiency and accuracy of information expression. For example, digital signals are easy to edit and can be copied conveniently, cheaply and without distortion. Digital sound, text, images and video are easily and cost-effectively transmitted and distributed etc. quickly and cheaply via electronic (network) or physical (CD-ROM) systems. However, the following problems are also very serious: i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/00
Inventor 姜楠杨义先
Owner BEIJING UNIV OF POSTS & TELECOMM
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