Dynamic ownership verification
Yongdong Wu · 2004
A joint-ownership verification approach [Huiping Guo, et al., (2002)] verified all the coowners with a secret sharing algorithm given that an authority is always available. The joint-ownership scheme was also extended to confirm partial ownership with additional watermarks embedded. This paper pointed out this extension reduces the scheme security and image quality. Additionally, the present paper proposes a new dynamic ownership scheme, which confirms individual owner's right independently. Furthermore, it enables ownership expiry, renewal and inheritance without rewatermarking the image after the image has been watermarked.