查询词典 ECC

An encryption method based on ECC is applied on the MPEG system directly. The encryption method isnt considered the characteristic of the video signal, regard the image data file as the general binary scale data file to encrypt.

论文最后采用了置乱算法的加密思想，考虑到MPEG-2视频结构中P帧和B帧中运动向量计算的特点，提出了一种基于混沌理论的视频加密算法。

ECC system makes use of the finite group of elliptic curve on the finite field instead of finite cyclic group used in the discrete logarithm problem. The theory of ECC is being studied a lot and it is the focus of the cryptography and the industrial estate, especially the technique of the implementation of ECC.In this thesis, the meaning of the information technology is discussed firstly, then we analyze the classical cryptography algoritham. After that, the mathematics base of elliptic curve cryptosytems are introduced, especially the theory of the finite field. As for some algorithms, we also give out the program of reliazation.

随后，介绍了研究椭圆曲线密码系统所需要的数学理论基础，特别是有限域中的椭圆曲线理论，并对相关的方法给出相应的实例及其程序实现；论文第三章讨论给出了椭圆曲线密码体制的研究现状，综述了椭圆曲线与现有一些密码算法的结合，介绍了椭圆曲线的离散对数问题以及椭圆曲线面临的攻击，详细描述了椭圆曲线密码系统的实现细节及各个部分的实验数据。

This paper first analyses and summarizes the ststus quo and evolution trend of encryption, some common used cryptograph are introduced, including the algorithms used in symmetric cryptosystem and asymmetirc cryptosystem. We describe the theory of each algorithms and compare the elliptic curve cryptosystem with the other two asymmetric cryptosystems to show the advantages of this algorithm. Second, the principle of ECC is discussed, including the math foundation of ECC, basic conception of elliptic curves, constructiong idea of ECC, operation on the elliptic curve and so on. Third, the current attacks of ECC were analyzed deeply, and an algorithm based on limited prime number field was constructed. We analyzed its realizability in theory, and implement it by using certain function of MIRACL software package. Latter half in this paper, the implementation model of a simple elliptic curve encryption system which based on GF has been introduced. The paper also put a deep analysis on the algorithm of point addition and point multiplication.

本文首先对密码技术的发展现状及其发展趋势进行了分析和综述，详细的介绍了私钥密码系统和公钥密码系统的发展，说明各种算法的原理和优缺点，并给出了一些典型的密码体制的简要分析，重点将椭圆曲线算法与其它几种公钥密码算法比较，说明椭圆曲线算法的优势；其次，探讨了椭圆曲线密码体制的原理，包括椭圆曲线密码的数学基础、基本概念、椭圆曲线密码体制的构造思想等问题；第三作者对椭圆曲线的攻击现状作了详细的分析，针对所使用的大素数域F_p，设计了素数域上安全椭圆曲线产生的算法，从理论上做了可实施性分析，从软件上做了具体实现；在本文的后半部分，提出了一个简单的基于有限素数域上的椭圆曲线加密方按算实现模型，并对SECES中设计的点加和点乘运算进行了深入分析。

Scalar multiplication is the main operation in ECC. It determines the speed of encryption / decryption in ECC.

椭圆曲线密码算法中最主要的运算是数乘运算，数乘运算的效率决定了椭圆曲线密码算法的加解密速度。

Degree of myocardial damage of ECC operation with the video-assisted thoracoscope is conspicuous about two hours after ECC stopping, but does not deteriorate.

幼龄犬胸腔镜体外循环术后的心肌损伤程度可能以停机后2 h最明显，后未再出现持续性加重。

ECC duration ranged from 28 minutes to 249 minutes, and occlusion time of the ascending aorta from 8 minutes to 135 minutes, all the infants were successfully weaned from the machine. One case died after operation.

结果 全组病例18例，男12例，女6例，年龄6～23 m，体重4.8～10 kg，ECC时间28～249 min，升主动脉阻断时间8～135 min，全组病例均顺利脱机，一例术后死亡。

OOB – 'spare area' of each page for ECC, bad block marked and YAFFS

OOB-空余的区域在每一个页上对于ECC。坏块被标记和YAFFS标签。

The maximum strain of UF-ECC is 8-20 times more than that of polypropylene fiber reinforced concrete.

ECC复合材料的最大拉应变是聚丙烯纤维混凝土的8~20倍。

Fast generation of secure elliptic curves is precondition in the ECC's resea...

快速产生安全的椭圆曲线是ECC理论研究和实际应用的前提和基础。

objective to compare the effects of utility of plasmalyte-a and lactate ringer's as crystalloid solution in open heart sugery with extracorporeal circulation.

目的 比较醋酸钠林格氏液勃脉力a和乳酸钠林格氏液两种晶体液在体外循环（extracorporeal circulation，ecc）心脏手术中的使用结果，减轻ecc对患者的生理干扰。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。