Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
YingJiu Li0
Huiping Guo0
Sushil Jajodia0
Date of Patent
May 18, 2010
Patent Application Number
11419800
Date Filed
May 23, 2006
Patent Primary Examiner
Patent abstract
A watermarking system embeds a watermark into data values that may be streamed. A data hash is calculated using data values and a hash key. The data values are grouped. The groups include a first group and a second group. A first group hash is calculated using data values in the first group and a first group hash key. A second group hash is calculated using data values in the second group and a second group hash key. A watermark is constructed based on the first group hash and the second group hash. The value of at least one of the data values in the first group is modified using the watermark.
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