Article ID Journal Published Year Pages File Type
7224773 Optik - International Journal for Light and Electron Optics 2018 11 Pages PDF
Abstract
Data hiding in encrypted image is a hot topic of data security in recent years. In this paper, we propose a reversible data hiding algorithm with high capacity in encrypted domain by exploiting alpha channel of portable network graphics (PNG) image. Specifically, our algorithm divides secret data into some segments. For each segment, one bit is embedded into the LSB of encrypted pixel and other bits are hidden in the corresponding element of the alpha channel, which is finally encrypted by two chaotic maps. With the use of alpha channel, our algorithm can perfectly recover secret data and reach high embedding capacity and good visual quality. Many experiments with standard benchmark images are carried out to validate efficiency of our algorithm. Comparison shows that our algorithm outperforms Zhang's algorithm (IEEE SPL 18(2011) 255-258).
Related Topics
Physical Sciences and Engineering Engineering Engineering (General)
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