A New Data Hiding Method for Protecting Bigger Secret Data

摘要

Security plays a vital role in business. To improve security, hiding secret data in an image can be employed when sending it in an electronic form. Some images are sensitive to modification, such as military and medical images. Thus, reversible data hiding needs to be utilized to prevent permanent distortion. We employ difference expansion, modulus function, and reduced difference expansion to conceal secret data into an image. Unlike previous methods, our scheme can conceal data in any block with any difference pixel value as long as they do not cause underflow or overflow. The result shows that this proposed method can increase the performance, especially the capacity of the payload. As the trade-off, the quality decreases, depending on the cover being used.