Digital product content protection system and method based on digital water mark

Abstract

The system comprises: a chooser used for choosing the information from the original contents and combining a part of chosen information to form the key encryption information; the rest part of the chosen information is combined to form the optional encrypted information which is outputted to the encryptor; an encryptor used for encrypting the key encryption information and the optional encryption information, and outputting it to the retriever; an retriever used for recovering the key encryption information and the optional encryption information to original content and sending it to the embedded digital watermarking device; the embedded digital watermarking device used for making digital watermarking embed for the original content, and outputting the original content embedded with the digital watermarking information is outputted to the decoder and other terminals. The invention also reveals a method thereof.

Description

technical field [0001] The invention relates to the technical field of digital rights management (DRM), in particular to a digital watermark-based digital product content protection system and method. Background technique [0002] DRM technology is a technology used to prevent digital products from being illegally distributed. With the continuous development of network technology, online content interaction is more and more popular. Illegal distribution of digital products has brought huge losses to content providers, and DRM technology is an effective way to protect digital copyrights. [0003] DRM technology protects digital content, authorizes access users through licenses, and controls user behavior through Rights Expression Language (REL), thereby achieving the purpose of protecting digital content. [0004] Among them, the protection of digital content is mainly realized through encryption. Since the volume of digital media is generally large, the current DRM system...

AI Technical Summary

Problems solved by technology

However, this encryption method also has the disadvantage of poor security

Because only one encryption key is used for all digital content, as long as the encryption key is cracked on one terminal, the key can be used to decrypt the digital content on other terminals, so that the effective protection of digital product content cannot be achieved. protection, seriously infringing on the legitimate rights and interests of digital product content owners

[0006] In addition, some users of digital product content violate the agreement and provide multimedia data for piracy, thereby enabling a large number of illegal copies of digital product content, which also seriously violates the legitimate rights and interests of digital product content owners

[0007] However, there is still no technical means to prevent the loss of multimedia data, and it is impossible to effectively track and find those users who violate the agreement and provide multimedia data for piracy, and thus cannot effectively protect the content of digital products

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