TITULO: On the connections between watermarking and noisy transmission

AUTOR: Josep Domingo-Ferrer
       Universitat Rovira i Virgili
       Dept. of Computer Engineering and Mathematics
       ETSE-Autovia de Salou s/n
       E-43006 Tarragona, Catalonia, Spain
       e-mail jdomingo@etse.urv.es

ABSTRACT:
A scheme for distortion-secure watermarking
and collusion-secure fingerprinting of digital information was recently
presented in which 
the problem of correct mark reconstruction was reduced to the problem
of transmission over a noisy channel. Taking that proposal as starting
point, this paper explores the connection
between copyright marking and information theory. 
We show that models used to formalize steganography ({\em e.g.} the
prisoners' model) do not exactly fit copyright marking.
Also, the connection between channel capacity and the maximal amount
of information that can be embedded in a covertext is discussed.