检索结果-南通市图书馆

Graphical password： prevent shoulder-surfing attack using digraph substitution rules

Frontiers of Computer Science 2017年第6期11卷 1098-1108页

作者： Lip Yee POR Chin Soon KU amanul islam Tan Fong ANG Department of Computer Science and Information Technology University of Malaya Kuala Lumpur 50603 Malaysia Department of Computer Science Universiti Tunku Abdul Rahman (Jalan Universiti) Kampar 31900 Malaysia

In this paper, a new scheme that uses digraph substitution rules to conceal the mechanism or activity re- quired to derive password-images is proposed. In the pro- posed method, a user is only required to click on one of the pass-image instead of both pass-images shown in each chal- lenge set for three consecutive sets. While this activity is sim- ple enough to reduce login time, the images clicked appear to be random and can only be obtained with complete knowl- edge of the registered password along with the activity rules. Thus, it becomes impossible for shoulder-surfing attackers to obtain the information about which password images and pass-images are used by the user. Although the attackers may know about the digraph substitution rules used in the pro- posed method, the scenario information used in each chal- lenge set remains. User study results reveal an average login process of less than half a minute. In addition, the proposed method is resistant to shoulder-surfing attacks.

关键词： graphical password authentication shoulder-surfing data and computer security digraph substitution rules

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Triple Differential Cross-Sections for Ionization of H(3d) by Incident Electron

引用

Open Journal of Microphysics 2018年第4期8卷 30-41页

作者： Sushmita Banerjee Sunil Dhar amanul Hoque Department of Mathematics Chittagong University of Engineering and Technology Chittagong Bangladesh Faculty of Business Administration BGC Trust University Chittagong Bangladesh

Triple differential cross sections (TDCS) are estimated for the ionization of metastable 3d-state hydrogen atoms by electron at 250 eV for various kinematic conditions pursuing a multiple scattering theory. The present new results are compared with the theoretical results of hydrogenic different metastable states as well as the hydrogenic ground state experimental data. Obtained new finding results are in good qualitative agreement with those of compared theories. The present results give an immense opportunity for experimental trial in the field of ionization problems.

关键词： Electron Ionization Cross-Sections Scattering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational Analysis of Silica gel-Water Adsorption Refrigeration Cycle with Vapor Recovery

Computational Analysis of Silica gel-Water Adsorption Refrig...

引用

第一届亚洲制冷空调大会

作者： Akira AKAHIRA K.C.amanul Alam Yoshinori HAMAMOTO Atsushi AKISAWA Takao KASHIWAGI Tokyo University of Agr. ＆ Tech. 2-24-16 Nakacho Koganei Tokyo 184-8588 Tokyo University of Agr. ＆ Tech. 2-24-16 Nakacho Koganei Tokyo 184-8588 Tokyo University of Agr. ＆ Tech. 2-24-16 Nakacho Koganei Tokyo 184-8588 Tokyo University of Agr. ＆ Tech. 2-24-16 Nakacho Koganei Tokyo 184-8588 Tokyo University of Agr. ＆ Tech. 2-24-16 Nakacho Koganei Tokyo 184-8588

＜正＞The study aims at clarifying the performance of silica gel-water adsorption refrigeration cycle with mass recovery process. A new strategy of mass recovery is proposed. Two cases of mass recovery process are studied and the performances are compared with the performances of conventional two-bed adsorption cycle. One is the conventional mass recovery process in which no heating and cooling are applied to the beds during the mass recovery process, the other is the newly proposed mass recovery process in which beds heating and cooling process are continued during the mass recovery proofs. A cycle simulation program is developed tn predict the performance of the proposed cycle. The results show that the proposed strategy along with mass recovery cycle improves cooling capacity significantly, which is highly desirable in view point of reducing system size. It is slso seen that COP values of the cycle without heating and cooling is increased by 28%, and cooling capacity of the mass recovery cycle with heating and cooling is increased from 11% than those of conventional single stage cycle at hot water temperature 60℃. The results show that mass recovery process has influential effect if the heat source temperature is low.

关键词： Adsorption Refrigeration cycle Mass recovery Silica gel Cooling capacity

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：