借用扩频技术的基本思想,提出了一种基于频域的秘密水印方案。利用椭圆曲线密码体制密钥短、安全强度高等特点,设计了一种基于椭圆曲线的安全性能好、抗攻击能力强,且适合有限资源条件下的秘密信息传输的方案。同时,对椭圆曲线秘密信息频域隐藏的嵌入算法和提取算法等进行了详细而周密的设计,最后还对方案的特点进行了分析。
This paper proposed a secret watermarking scheme in frequency domain based on extending frequency theory. According to it, a particular and integrated scheme was designed combining with the characteristics of shorter key and higher security intensity for elliptic curve cryptosystem. And also, the frequency domain secret information embedding algorithm and pick-up algorithm were designed in detail. Finally the scheme' s strongpoint was analyzed.