The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2012
Filed:
Oct. 30, 2007
Applicants:
Ahmed Tewfik, Edina, MN (US);
Bin Zhu, Beijing, CN;
Mitch Swanson, Eden Prairie, MN (US);
Inventors:
Assignee:
Regents of the University of Minnesota, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of embedding a watermarking in a host signal computes a first watermark depending on a particular party and computes a second watermark depending on the host signal. The method embeds the first and second watermarks in the host signal. At least one of the watermarks is embedded using a key derived from the host signal. In particular, one of the watermarks is embedded with a key derived from the host signal.