Title :
Dynamic ownership verification
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
Abstract :
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.
Keywords :
authorisation; data encapsulation; inheritance; telecommunication security; watermarking; authority; image quality; image rewatermarking; inheritance; joint dynamic ownership verification; partial ownership; secret sharing algorithm; security; watermarks embedding; Authentication; Computer networks; Cryptography; Degradation; IP networks; Image generation; Image quality; Image retrieval; Protection; Watermarking;
Conference_Titel :
Information, Communications and Signal Processing, 2003 and Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint Conference of the Fourth International Conference on
Print_ISBN :
0-7803-8185-8
DOI :
10.1109/ICICS.2003.1292606
