초록 ▼

A method and apparatus for digital watermarking to resolve multiple claims of ownership is disclosed. According to one embodiment of the invention, a first watermark requiring the host data for detection is embedded into the host data. A second watermark is also embedded into the host data. Accordin

A method and apparatus for digital watermarking to resolve multiple claims of ownership is disclosed. According to one embodiment of the invention, a first watermark requiring the host data for detection is embedded into the host data. A second watermark is also embedded into the host data. According to another embodiment of the invention, a pseudo-random sequence acting as a watermark is generated based on two random keys. One of the two random keys is related to the author of the host data into which the watermark is to be embedded, whereas the other of the two random keys is dependent on the host data itself.

대표청구항 ▼

[ I claim:] [1.]1. A computerized method for watermarking host data comprising:embedding a first watermark into original host data to produce watermarked host data, wherein the first watermark requires the original host data in order to be detected; and,embedding a second watermark into the watermar

[ I claim:] [1.]1. A computerized method for watermarking host data comprising:embedding a first watermark into original host data to produce watermarked host data, wherein the first watermark requires the original host data in order to be detected; and,embedding a second watermark into the watermarked host data, wherein the second watermark does not require the original host data to be detected and wherein the second watermark identifies an authentic owner of the host data when the first watermark is subtracted off the watermarked host data.