A public-key image hiding scheme is proposed to offer safe exchange of a stego image on the Internet. In the proposed scheme, the secret image is first compressed by quadtree partition vector quantization (QPVQ) coding into the indices bit stream, which is then embedded into the discrete cosine transform (DCT) of the cover image. In the embedding process, adaptive quantization and appropriate DCT coefficients are used to enhance the imperceptibility of the stago image. On the other hand, the Rivest, Shamir, and Adleman (RSA) algorithm is hired to provide the mechanism of a public-key system for secure communication on the Internet. Our proposed method has two advantages compared with other data hiding techniques. One is the high safety and convenience offered by the RSA system to exchange data on the Internet. The other is that the stego image can pass through high-quality Joint Photograph Experts Group (JPEG) compression without noticeable degradation.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics