Method and system embedding a non-detectable fingerprint in a digital media file
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United States of America Patent
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Jul 30, 2013
Grant Date -
Jan 12, 2012
app pub date -
Jul 12, 2011
filing date -
Jan 13, 2009
priority date (Note) -
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Abstract
The invention relates to a method and system for embedding in a digital media file user fingerprint which the user cannot detect when using the digital media file. In the method, a user-detectable watermark is first embedded in the digital media file. This watermark can be transformed in a client device to a non-detectable fingerprint of the user by utilizing digital media file-specific information issued by a digital media rights owner when the user has bought a user license. Afterwards the digital media rights owner can read the embedded user fingerprint from the digital media file if it is illegally distributed between other users.
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