3D Model Permutation Steganography for Access Rights Management

• Main Authors: Ching-ping Li, 李靖平
• Other Authors: Hsin-Chih Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/71974744395001181703

碩士 === 國立臺南大學 === 數位學習科技學系碩士在職專班 === 98 === In this study, an approach to hiding a secret message and, in the mean time, managing access rights in a 3D humanoid mesh model is proposed. First of all, a humanoid model is divided into several segments according to the requirement of access rights. These segments are then modeled as a directed acyclic graph, representing their mapping relationships, including one-to-one, one-to-many, many-to-one, and many-to-many, which can be derived from those connectivity segments. Afterward, a secret message can be hidden in each segment. The proposed approach is error-free since it does not modify the geometry of the cover model. As for extracting the secret message in each segment, it would be extremely difficult unless a complete decoding so far and a correct key are available. According to the workflow deployment, the proposed method can also enhance the security and provide an efficient procedure to reduce steps of redundant information hiding.