Improving embedding efficiency by incorporating SDCS and WPC

Authors:
Chengcheng Liu;Xiaolong Li;Xiaoqing Lu;Bin Yang
Affiliations:
Institute of Computer Science and Technology and Key Laboratory of Network and Software Security Assurance, Peking University, Ministry of Education, Beijing, China;Institute of Computer Science and Technology and Key Laboratory of Network and Software Security Assurance, Peking University, Ministry of Education, Beijing, China;Institute of Computer Science and Technology and Key Laboratory of Network and Software Security Assurance, Peking University, Ministry of Education, Beijing, China;Institute of Computer Science and Technology and Key Laboratory of Network and Software Security Assurance, Peking University, Ministry of Education, Beijing, China
Venue:
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Year:
2009

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Abstract

Embedding efficiency, which is defined as the average number of secret data bits embedded per one embedding change, is an important attribute directly influencing the security of steganography. Higher embedding efficiency is usually expected to get more secure stegano-graphic method. In this paper, by incorporating two previously introduced techniques: the "sum and difference covering set" (SDCS) and the "wet paper code" (WPC), a novel double-layered embedding method is presented. As compared with the original SDCS-based steganography, the novel method can embed more bits without introducing additional embedding distortion, therefore the embedding efficiency is improved. In summary, the proposed method provides some steganographic schemes with diverse embedding rates and good embedding efficiency.