Watermarking Algorithm for PDF Document Based on Comment Objects

Abstract

As PDF documents used extensively, security issues become increasingly more prominent. This paper presents an object-oriented PDF document page watermarking algorithm, in which a watermark signal is embedded as a legitimate PDF document page object. The object is not a pseudo-page to access the document reader, thus ensuring the regular PDF display function. The simulation results demonstrate the simpleness and robustness, security and invisibility, also with the capacity of watermarking algorithm guaranteed.