A secure watermarking technique without loss of robustness

Abstract

This paper proposes a novel watermarking technique called random direction embedding (RDE) watermarking. Unlike the conventional watermarking techniques, the watermark energy after the RDE embedding does not focus on a fixed direction, hence the proposed technique is secure against the traditional unauthorized watermark removal attack. The important merit of the RDE watermarking is that it achieves the security without loss of robustness. Compared with the existing secure watermarking techniques, such as natural watermarking (NW), the RDE watermarking achieves significant improvement in terms of robustness. On the other hand, it is also more robust than the spread spectrum watermarking techniques, which have been demonstrated to be very insecure.