其次讨论最优扩域上的椭圆曲线安全性问题，给出了安全椭圆曲线的选取准则和选取算法；
Then, the safety of elliptic curve based on OEF is discussed, and the selection criterions and the selection algorithm of secure elliptic curve are given.
一般而言，该问题归结为模大素数的二次剩余问题，但这种归结不能用于最优扩域OEF。
Generally, this problem is reduced to quadratic residue problem of modulo a big prime number. But this reduction is not applicable to Optimal Extension Fields (OEF).
在椭圆曲线密码体制(ECC)中，无论是最终性能或是存储需求，最优扩域都具有明显优势。
In Elliptic Curves Cryptosystems (ECC), the optimal extension fields is preferable to others method, whether concerns performance or memory request.
研究工作分为两个部分，一部分是对复合域、理想扩域的结构特点和其上的快速运算算法的分析、研究；
The first one is the research on the feature of composition fields and optimal extension fields as well as the fast algorithm in those fields.
接着研究基于最优扩域的椭圆曲线密码实现过程中的几个关键问题，包括参数的生成、基点的选取和标量乘算法。
Several key problems in the implementation of ECC based on OEF are analyzed, which includes validating the parameters, selecting base point and the algorithms for scalar multiplication.
乌鲁木齐市域面积扩为14216平方千米。
Urumqi City is an area of expansion for the 14216 square kilometers.
文章提出一种基于小波变换的新颖的鲁棒语音扩谱水印算法。算法对原始语音进行离散小波变换，利用扩谱水印技术将水印隐藏到小波域。
This paper proposes a novel robust spread-spectrum (ss) audio watermarking scheme based on DWT, in which a watermark is embedded into wavelet domain which original audio signal is transformed to.
文章提出一种基于小波变换的新颖的鲁棒语音扩谱水印算法。算法对原始语音进行离散小波变换，利用扩谱水印技术将水印隐藏到小波域。
This paper proposes a novel robust spread-spectrum (ss) audio watermarking scheme based on DWT, in which a watermark is embedded into wavelet domain which original audio signal is transformed to.
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