Existence of the normal integral basis of the quartic field;
四次域Q(m~(1/2),n~(1/2))的正规整基的存在性
11i 4-way handshake,and it is found that there exists security vulnerability,which will lead to a DoS attack.
11i协议中四次握手过程的临时会话密钥的协商和建立过程中的安全性进行了分析,发现在四次握手过程中存在安全隐患,并因此可能受到DoS(拒绝服务)攻击。
In this paper, it is presented that the locus of a line crossedwith each of two guide lines and a guide conic not being on a commonplane is a ruled surface of fourth order.
本文提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线轨迹是一个直纹四次曲面，并讨论了二次曲线分别为椭圆、双曲线和抛物线时，形成的曲面的形状特征。
It is presented that the locus of a line crossed with each of two guide line and a guide conic not being on a common plane is a ruled surface of fourth order.
提出了由一条二次曲线和与该二次曲线不共面的两条异面直线为导线，与该三导线均相交的直线的轨迹是一个直纹四次曲面，并对该曲面的特性作了一些初步探讨。