Open Access

A Secure and Robust Object-Based Video Authentication System

EURASIP Journal on Advances in Signal Processing20042004:545469

DOI: 10.1155/S1110865704312217

Received: 31 March 2003

Published: 28 October 2004


An object-based video authentication system, which combines watermarking, error correction coding (ECC), and digital signature techniques, is presented for protecting the authenticity between video objects and their associated backgrounds. In this system, a set of angular radial transformation (ART) coefficients is selected as the feature to represent the video object and the background, respectively. ECC and cryptographic hashing are applied to those selected coefficients to generate the robust authentication watermark. This content-based, semifragile watermark is then embedded into the objects frame by frame before MPEG4 coding. In watermark embedding and extraction, groups of discrete Fourier transform (DFT) coefficients are randomly selected, and their energy relationships are employed to hide and extract the watermark. The experimental results demonstrate that our system is robust to MPEG4 compression, object segmentation errors, and some common object-based video processing such as object translation, rotation, and scaling while securely preventing malicious object modifications. The proposed solution can be further incorporated into public key infrastructure (PKI).

Keywords and phrases

watermark authentication error correction coding cryptographic hashing digital signature

Authors’ Affiliations

Institute for Infocomm Research (I²R)


© He et al. 2004