Security Analysis of Content-Based Watermarking Authentication Framework

This paper analyzes the security of content-based watermarking authentication framework in the extraction of the feature watermark and the watermark embedding using information theory. Security analysis of feature watermark is composed of four parts, that is, the extracted feature is as watermark, the encrypted feature after extracted is as watermark, the encrypted feature before extracted is as watermark and the encrypted feature while extracted is as watermark. Security of watermark embedding is analyzed from two parts, that is, the watermark embedding is controlled by secret key and the watermark embedding is no secret key. Additionally, the integration security of the feature watermark and the watermark embedding is analyzed from eight aspects. Through the security analysis of these architectures, some important conclusions are proved and drawn, a the corresponding suggestions are pointed out.