There is a paper on stegonography "Minimum Protocols for the Insertion of Messages into Random or Pseudorandom Data" posted to sci.crypt.research. From: klockstone at cix.compulink.co.uk (Keith Lockstone) Message-ID: <3benes$pbh at net.auckland.ac.nz> Adam -- "It is seldom that liberty of any kind is lost all at once." -Hume