Daniel Augot Jean-François Delaigle Caroline Fontaine DHWM: A Scheme for Managing Watermarking Keys in the Aquarelle Multimedia Distributed System. 241-255 1998 conf/esorics/1998 ESORICS http://dx.doi.org/10.1007/BFb0055867 db/conf/esorics/esorics1998.html#AugotDF98