CONTEXT WATERMARK FOR DIGITAL CONTENTS

摘要

A method for context watermarking includes the steps of performing a Hash function "D" of the digital content (502). A Hash function "C" of the context information is also calculated (504). The Hash "D" is then appended to the context information (506) while the Hash "C" is appended to the digital content (508). The augmented content and context information are then packaged together (510) with the Hash values "D" and "C" helping to bind the content and context together. Instead of using Hash function other more sophisticated signatures can be used like those produced using Discrete Wavelet Transforms (DWT) or fractal-based transforms. An electronic device such as a radio communication device (700) capable of performing context watermarking is also described.