| | |
Summary: WHIM: Watermarking Multicast Video with a
Hierarchy of Intermediaries
Paul Judge, Mostafa Ammar
College of Computing, Georgia Institute of Technology, Atlanta, GA 30332
fjudge,ammarg@cc.gatech.edu
Abstract--- Fingerprinting, watermarking content to iden
tify the recipient, provides a good deterrence to unautho
rized duplication and propagation of multimedia streams.
This is straightforward in a unicast environment; however,
in a multicast environment, inserting a fingerprint at the
source does not provide any security since many receivers
will share a common fingerprint. A simple solution would be
to fingerprint the data for each user at the source and uni
cast the different streams. We aim to achieve a more scalable
solution while maintaining and even increasing the level of
security. To achieve this, we have developed WHIM, a scal
able system that allows multicast content to be marked with
distinct information for distinct receivers securely. This sys
tem introduces two new concepts: 1)generating a watermark
based on the receiver's location in a tree overlaying the net
|
