域扩张 [数] field extension
最优扩域 OEFs
不断扩大开放领域 expand the fields of opening up
双边防扩散合作领域 bilateral cooperation on nonproliferation
定域扩散 [电子] localized diffusion
扩张域 [数] overfield ; [数] extension field ; Extensional field
单代数扩域 Single algebraic extension
有限维扩张域 finite extension ; finite dimensional extension field
域的扩张 [数] extension of a field
广义最优扩域 generalized optimal extension fields
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.
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