有限域，有限群论，混沌理论，编码，数字水印，密码学。
Finite Field, Theory of Finite Groups, Chaos Theory, Coding, Digital Watermarking, Cryptography.
从理论推导和实验计算分析，用协同序参量作为数字水印的鲁棒性评判指标，具有一定可行性和实用性。
With theoretic testify and experimental analysis, the method of using synergetic order parameter as quantitative index of digital watermark robustness has feasibility and practicability.
理论分析和仿真结果表明，该非对称水印系统能够提供可靠的非对称检测，系统鲁棒性高。
The theory analysis and simulation results demonstrate that the asymmetric watermarking system can provide reliable asymmetric detections, and it has high robustness .
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