Digital watermarking infrastructure

A digital watermarking and infrastructure technology, applied in the direction of electrical digital data processing, digital data processing components, instruments, etc., can solve the problems of complex systems and increased implementation costs, so as to reduce network load, reduce requirements, and reduce internal communication volume effect

Inactive Publication Date: 2004-12-29
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The system does not technically solve the key problem of how to find illegal copies...

Method used

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  • Digital watermarking infrastructure
  • Digital watermarking infrastructure
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Examples

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Embodiment Construction

[0034] exist figure 1 The relationship between the three entities of the whole system is revealed in the document. There are two CA-signed watermarks embedded in the legal digital works purchased by the user, one is used to identify the publisher (copyright information), and the other is used to identify the purchaser (digital information). Fingerprints); when illegal copies of digital works are found through mobile agents or storage media, it can be determined based on the two extracted watermarks who is carrying out illegal transmissions, providing evidence for tracing illegal copies. Among them, the copyright information watermark contains the publisher ID and the work ID, the digital fingerprint watermark contains the buyer ID, and the two watermarks are random sequences generated by the corresponding IDs after being signed by the CA as seeds.

[0035] figure 2 The copyright information generation process is shown. The publisher RH to register the copyright calculates t...

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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 copyright protection of digital works and tracking of illegal copies by using digital watermarking 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 transmitted and distributed rapidly and cost-effectively through electronic (network) or physical (CD-ROM) systems. However, the problems that follow are also very serious: ...

Claims

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Application Information

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