查询词典 Kem

Hybrid schemes in a KEM-DEM structure is regarded as the most natural approach to public key encryption with IND-CCA security and practical efficiency. Traditional KEM is realized by public key scheme, which only provides confidentiality security for session key used by DEM. In 2005, combining the idea of signcryption with the KEM-DEM model hybrid encryption, Alexander proposed a signcryption KEM-DEM model hybrid signcryption primitive.

KEM-DEM结构的混合密码体制是获得IND-CCA安全最实际有效的方法，传统的KEM由公钥加密方案实现，仅提供DEM使用的会话密钥的保密性安全。2005年Alexander等人将签密的概念与KEM-DEM结构的混合密码体制相结合，提出了Signcryption KEM-DEM结构的混合签密。

The KEM scheme in the KEM+DEM paradigm is used to encapsulate the symmetric key for a multi-message hybrid encryption, IND-CCAs security is proved. An instantiation is presented to show the requirement of IND-CCA2 security for KEM is not essential.

4证明了KEM+DEM混合加密范例中的KEM用于多消息混合加密中，即KEM+SKE，是IND-CCA_S安全的，并用一个实例说明了此时对KEM要求IND-CCA2不是必要的。

For the unsuitabihty of the Tag-KEM/DEM to be used as multi-message hybrid encryptions, a new hybrid paradigm, KEM/Tag-DEM, is proposed with its security proof. For the corresponding multi-message hybrid paradigm, KEM/Tag-SKE, security is also proved. Two constructions for IND-CCA secure Tag-DEMs are proposed with the security proof.

6鉴于Tag-KEM／DEM不宜用作多消息混合加密，提出一种新的混合加密范例KEM／Tag-DEM，证明了它作为一次混合加密时的安全性，以及对应的多消息混合加密KEM／Tag-SKE的安全性，给出了两种构造Tag-DEM的方法并证明了安全性。

Compared with traditional KEM scheme, Signcryption KEM can provide both confidentiality security and unforgeability security for session key.

该方法可以使密钥封装同时具有保密安全性和不可伪造安全性。

The theory of KEM for simple soils limit analysis is dissertated in detail. Based on this, KEM has been developed to complicated soils limit analysis for the first time. Appropriate functions and variables of different engineering practice are presented, and the minimization technique for functions is adopted the conjugate gradient method.

在详细论述了土体极限分析KEM的基本原理、对均质土体极限分析KEM研究的基础上，根据KEM的基本原理，在国内首次将KEM扩展应用到复杂土体的极限分析中，根据工程问题的实际情况找出了合适的KEM土体极限分析目标函数和自变量，对目标函数的优化方法采用了变尺度法。

This makes the definition even not equivalent to the indistinguishability, which contradicts with what has been widely acknowledged.(3) One-time and multi-message hybrid encryptions is separated, especially the security definitions for them. For the most direct paradigm of hybrid encryption PKE+SKE, the IND-CCA_I security when it is a one-time one and the IND-CCA5 security when it is a multi-message one are proved respectively. For both of them, the necessity of the security requirement for PKE and SKE is discussed.(4) For the KEM+SKE multi-message hybrid paradigm, i.e.

3区分了一次混合加密和多消息混合加密，特别是它们的安全性定义，提出了混合加密的最直接实现范例PKE+SKE，分别证明了它作为一次混合加密时能够达到IND-CCA_I安全性，作为多消息混合加密时能够达到IND-CCA_S安全性，并分别讨论了此时对PKE和SKE的安全性要求的必要性。

In this dissertation, series of research of KEM for complicated soils limit analysis is listed.

本文对KEM在复杂土体极限分析中的应用进行了深入系统的研究。

The fundamentals concept is introduced, and the Object-Oriented theory for KEM to resolve complicated object is analyzed in the paper.

论文介绍了面向对象的基本概念，分析了面向对象技术来解决复杂对象知识的表示问题。

On the basis of analyzing all kinds of KEM, the Object-Oriented theory is chosen as the design project to construct knowledge base of expert system.

面向对象技术是二十世纪八十年代兴起，并越来越为人们所重视的一种分析思想和程序设计方法。

On the basis of analyzing all kinds of KEM, the Object-Oriented theoryis chosen as the design project to construct knowledge base of expert system.

对专家系统和面向对象的程序设计方法进行了概述，引出了面向对象的汽车制动专家系统，介绍了汽车领域专家系统的国内外应用现状，及开发汽车制动专家系统的意义和知识库的内容。2。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。