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[WM]: info request



 Hi,
 I'm looking for some information about Channel Identification and Encoder Function.
 
Channel Identification consists of estimating the attack channel from the cryptographic key and the the signal coming out from
channel.
Encoder function is a function that receives: the cryptographic key, the signal (called host data set) and the message to embed into
the signal.
This function returns the watermarked data.

I need to know how some encoder functions work  end i need to know some algorithms of channel identification.
 
Can you help me?

Kind regards,
Paolo  


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