| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and a system for fingerprinting a data object in a server system and a method and a system for extracting the fingerprint from the data object in a client system. <P>SOLUTION: Sections of a data object are watermarked with known watermark data in order to create a first and a second variant of the data object, whereby the section boundaries are optionally saved as metadata. Using the metadata, the first and second variant are combined by taking sections from the variants to create a fingerprinted data object. From the fingerprinted data object, the watermark data can be extracted again. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
