VQ-based digital signature scheme for multimedia content authentication
Qibin Sun, Di Zhong, Shih-Fu Chang, Jiankang Wu, Arcot Desai Narasimhalu · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
The need to authenticate multimedia content (audio, image and video) brings new challenges to the traditional digital signature schema. Unavoidable transmission distortion of multimedia data, such as noises introduced in printing a certificate, demands new authentication techniques that are resistant to reasonable modifications. In this paper, a novel approach to multimedia authentication based on the vector quantization (VQ) technique is presented. Its security is guaranteed by adopting a typical digital signature scheme and a hierarchical authentication procedure. The flexibility of this approach is achieved by the scalability of VQ. In addition, a feature-based registration procedure is used to pre-filter and restore the received media with reference to the original one. Using this method, a continuous measure of the authenticity can be computed based on the proposed registration and authentication procedure. This measure is helpful for setting a proper threshold for some specific authentication applications. Our experimental results with audio, image, and video have shown that the scheme is robust and practical.