Summary
International Symposium on Nonlinear Theory and its Applications
2008
Session Number:A3L-E
Session:
Number:A3L-E3
Method of Falsification Detection for JPEG Images Using Chaotic Watermarks and Its Evaluation
Masaru Hisano, Taichi Umezawa, Hiroyuki Kamata,
pp.-
Publication Date:2008/9/7
Online ISSN:2188-5079
Summary:
The technique of the falsification detection for JPEG images using digital watermark based on the chaos theory is proposed. By embedding chaotic signals as the digital watermark data, the falsification of JPEG images can be detected because of the Sensitive Dependence on Initial Conditions and Orbital Instability of chaos. In this paper, 8-bit alphanumeric characters are decided as the original information data and are modulated to two chaotic signals. Furthermore, based on a same information data, two chaotic signals are generated by modulators with different parameters, respectively, and are embedded to a DCT coefficient block. By this method, even if the information data is uncertain, the falsification can be detected by comparing the demodulated signals. In this paper, the ability and the effectiveness of the proposed method are shown by some experimental results.