Watermarking and transferring material
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 14, 2011
Grant Date -
Jan 22, 2009
app pub date -
Sep 24, 2008
filing date -
Dec 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A client device for use in a system having a server, the client device including: a receiving device configured to receive information material from the server, the information material containing a reversible modification providing a visually perceptible disturbing effect having been applied to the information material by using an invertible algorithm which uses values generated from one or more keys, and to receive identifying information that distinguishes the information material from other information material available from the server and condition information which defines a predetermined condition that should be met in order for the reversible modification to be reversed.
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