演講摘要：

With the wide use of internet and social media these days, multimedia is enriching our lives in every way. More and more devices are capable of producing and handling data such as audio, image, video and computer graphics. Therefore, multimedia data security has attracted more and more attention from researchers and practitioners in academia and industry all over the world. Data hiding is a useful technology in the field of information protection, so that the adversary can not detect the embedded information. In recent years, many reversible data hiding methods have been proposed. Among them, the pixel value ordering (PVO) method can be used to create high-fidelity camouflage images under good embedding capacity. In this talk, we show the related PVO based steganographic algorithms and discuss their performance.