Separable Reversible Data Hiding Based on Integer Mapping and Multi-MSB Prediction for Encrypted 3D Mesh Models

Extensive research has been conducted on image-based reversible data hiding in encrypted domain (RDH-ED) methods, but these methods cannot be directly applied to other cover medium, such as text, audio, video, and 3D mesh. With the widespread use of mesh Internet, medium for RDH gradually become a topic. The main challenge studying based is that structure complex geometric irregular. In this paper, we propose separable RDH-ED method integer mapping multiple most significant bit (Multi-MSB) prediction. Firstly, all vertices are divided into “embedded” set “reference” set, floating-point vertex values mapped integers. Then, sender calculates prediction error set. Data hider embeds additional by replacing Multi-MSB coordinates without error. According different permissions, legal recipients can obtain original mesh, or both them using proposed method. Experimental results prove outperforms state-of-the-art methods.