Hiding Information in Document Images

Abstract

Consider 2 distinct document... In this paper we show how to use spatial information to reliably hide data in document images. Experimental results reveal that this information survives the distortions introduced by noisy image reproduction devices. We also describe the implementation of a prototype document marking and distribution system. The system can be used to discourage unauthorized reproduction and dissemination of either copyrighted documents distributed electronically, or paper copies of confidential executive memoranda.