security n. 1.安全(感);安稳;稳妥;平安。 2.确实;确信;把握;可靠性;安心。 3.【军事】防御物。 4.保护;防护;保卫;防御 (against; from); 治安,安全防卫。 5.【法律】保证,担保;抵押。 6.担保品;保证金;借用证 (for)。 7.担保人;保证人。 8.〔pl.〕证券;债券;公债;股票。 9.〔古语〕疏忽;大意。 public security 公安。 public security organs 保卫机关;公安机关。 What security can you offer for it 你对这件事能拿什么做担保呢? S- is the greatest enemy. 疏忽[麻痹大意]是最大的敌人。 give security against 保护;使无…之忧。 go [enter into, give] security for 做…的保人。 in security 安全。 in security for 作…的担保。 on good security 有可靠的抵押。
Abstract : this paper introduces some practical security models and their actions and characteristics 文摘:介绍信息安全模型的作用和特征以及几种目前比较实用的安全模型。
Security administrator can make flexible combinations of security modules according to practical security requirements , and administrate the system remotely by using graphical interfaces 其基于电子证书的身份认证、可根据实际需要对安全模块进行灵活配置、远程管理等功能尤为突出。
It is observed that the system has high practical security , fast encryption ( decryption ) speed and excellent reliability against strong channel noise , and its overall cryptographic properties are considerably better than known chaotic cryptosystems 研究表明,该系统具有高安全性、快加密(解密)速度和强抗信道噪声能力,它的密码性质优于所有已知的混沌密码系统。
In the end , a reliable and practical security policy , in which container based declarative security is dominant and programmatic security is complementary , is given respectively to the web tier , ejb tier and eis tier of the system according to the system framework and deployment environment 最后还结合系统框架和部署环境分别针对j2ee的网络层、 ejb层和eis层的不同情况制定了以基于容器的声明性安全为主,以可编程性安全为补充的安全策略。
In this paper , the belief logic system gny and it ' s related implementation tool spearii are utilized , ssl protocol is a focused instance , then the detailed analysis procedure from initial protocol model to various evolution protocol models is given , later the final evolution protocol model and ssl protocol are contrasted and thus the security analysis conclusion is drawn for ssl . during the analysis procedure two practical security authentication solutions are designed based on evolution protocol models 本文采用著名的信念逻辑gny逻辑系统及其相关的形式化工具spear ,以ssl协议为分析实例,详细阐述了从初始协议模型到各个进化协议模型的分析过程,并将最终的进化模型与ssl协议作比较,给出ssl协议的安全分析,同时在分析过程中以协议模型为基础设计了两个实用的安全认证方案。
Concentrating on security analysis and design of block ciphers , five principal achievements have been obtained in this dissertation : 1 . using differential - nonlinear cryptanalysis , truncated differential - linear cryptanalysis and integral cryptanalysis respectively , three attacks of reduced - round safer + + are given ; 2 . based on the survey of provable security and practical security of block ciphers , a block cipher model of spn cipher containing feistel structure is proposed 分别利用差分-非线性密码分析、截断差分-线性密码分析、积分密码分析三种不同的密码分析方法,对safer + +进行了密码分析; 2在对分组密码的可证明安全性和实际安全性研究的基础上,提出了一个嵌套feistd结构的sp型分组密码的模型。