A digital watermark is an invisible mark embedded in a digital image that may be used for a number of different purposes including copyright protection. Due to the urgent need for protecting the copyright of digital p...A digital watermark is an invisible mark embedded in a digital image that may be used for a number of different purposes including copyright protection. Due to the urgent need for protecting the copyright of digital products in digital library, digital watermarking has been proposed as a solution to this problem. This letter describes potential situations that nonlinear theory can be used to enhance robustness and security of the watermark in digital library. Some nonlinear watermark techniques have been enumerated. Experimental results show that the proposed scheme is superior to the general watermark scheme both in security and robustness in digital library.展开更多
Non-fungible token(NFT)emerges with the marvelous explosion of the metaverse.NFT digital works are profoundly impacting the existing copyright system,which needs to be amended and responded to in time.There is a possi...Non-fungible token(NFT)emerges with the marvelous explosion of the metaverse.NFT digital works are profoundly impacting the existing copyright system,which needs to be amended and responded to in time.There is a possibility that it will completely change the distribution pattern of rights and interests in the field of copyright law.Currently,the legal nature of the casting and trading of NFT digital works remains controversial.The liability of NFT digital works creators,as well as service platforms,is required to be further identified.This article starts with an analysis of the right attributes of NFT digital works based on intellectual property law.Subsequently,the related legal issues and countermeasures are discussed,including the exhaustion of the right-holders,the duty of platform management,and the assumption of tort liability arising from the transaction.It is suggested that the NFT digital works should be treated with considerable caution and the legal system of NFT digital works should be constructed in the near future.展开更多
基金Supported in part by the National Natural Science Foundation of China (No.60072044).
文摘A digital watermark is an invisible mark embedded in a digital image that may be used for a number of different purposes including copyright protection. Due to the urgent need for protecting the copyright of digital products in digital library, digital watermarking has been proposed as a solution to this problem. This letter describes potential situations that nonlinear theory can be used to enhance robustness and security of the watermark in digital library. Some nonlinear watermark techniques have been enumerated. Experimental results show that the proposed scheme is superior to the general watermark scheme both in security and robustness in digital library.
基金supported by the major project of the National Social Science Foundation“Research on the Social Impact and Governance Path of Internet Platforms”(21&ZD195)
文摘Non-fungible token(NFT)emerges with the marvelous explosion of the metaverse.NFT digital works are profoundly impacting the existing copyright system,which needs to be amended and responded to in time.There is a possibility that it will completely change the distribution pattern of rights and interests in the field of copyright law.Currently,the legal nature of the casting and trading of NFT digital works remains controversial.The liability of NFT digital works creators,as well as service platforms,is required to be further identified.This article starts with an analysis of the right attributes of NFT digital works based on intellectual property law.Subsequently,the related legal issues and countermeasures are discussed,including the exhaustion of the right-holders,the duty of platform management,and the assumption of tort liability arising from the transaction.It is suggested that the NFT digital works should be treated with considerable caution and the legal system of NFT digital works should be constructed in the near future.
