检索结果-南通市图书馆

Cross-Domain Bilateral Access Control on Blockchain-Cloud Based Data Trading System

Computer Modeling in Engineering & Sciences 2024年第10期141卷 671-688页

作者： youngho park Su Jin Shin Sang Uk Shin Electronics and Information Communications Research Center Pukyong National UniversityBusan48513Republic of Korea Department of Information Security Graduate SchoolPukyong National UniversityBusan48513Republic of Korea Division of Computer Engineering Pukyong National UniversityBusan48513Republic of Korea

Data trading enables data owners and data requesters to sell and purchase *** the emergence of blockchain technology,research on blockchain-based data trading systems is receiving a lot of ***,to reduce the on-chain storage cost,a novel paradigm of blockchain and cloud fusion has been widely considered as a promising data trading ***,the fact that data can be used for commercial purposes will encourage users and organizations from various fields to participate in the data *** the data marketplace,it is a challenge how to trade the data securely outsourced to the external cloud in a way that restricts access to the data only to authorized users across multiple *** this paper,we propose a cross-domain bilateral access control protocol for blockchain-cloud based data trading *** consider a system model that consists of domain authorities,data senders,data receivers,a blockchain layer,and a cloud *** proposed protocol enables access control and source identification of the outsourced data by leveraging identity-based cryptographic *** the proposed protocol,the outsourced data of the sender is encrypted under the target receiver’s identity,and the cloud provider performs policy-match verification on the authorization tags of the sender and receiver generated by the identity-based signature ***,data trading can be achieved only if the identities of the data sender and receiver simultaneously meet the policies specified by each *** demonstrate efficiency,we evaluate the performance of the proposed protocol and compare it with existing studies.

关键词： Bilateral access control blockchain data sharing policy-match

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

Blockchain-Based Secure and Fair IoT Data Trading System with Bilateral Authorization

引用

Computers, Materials & Continua 2023年第8期76卷 1871-1890页

作者： youngho park Mi Hyeon Jeon Sang Uk Shin Electronics and Information Communications Research Center Pukyong National UniversityBusanKorea Department of Information Security Graduate SchoolPukyong National UniversityBusanKorea Division of Computer Engineering Pukyong National UniversityBusanKorea

These days,data is regarded as a valuable asset in the era of the data economy,which demands a trading platform for buying and selling ***,online data trading poses challenges in terms of security and fairness because the seller and the buyer may not fully trust each ***,in this paper,a blockchain-based secure and fair data trading system is proposed by taking advantage of the smart contract and matchmaking *** proposed system enables bilateral authorization,where data trading between a seller and a buyer is accomplished only if their policies,required by each other,are satisfied *** can be achieved by exploiting the security features of the matchmaking *** guarantee non-repudiation and fairness between trading parties,the proposed system leverages a smart contract to ensure that the parties honestly carry out the data trading ***,the smart contract in the proposed system does not include complex cryptographic operations for the efficiency of onchain ***,these operations are carried out by off-chain parties and their results are used as input for the on-chain *** system also uses an arbitration protocol to resolve disputes based on the trading proof recorded on the *** performance of the protocol is evaluated in terms of off-chain computation overhead and on-chain gas *** results of the experiments demonstrate that the proposed protocols can enable the implementation of a cost-effective data trading system.

关键词： Bilateral authorization blockchain data marketplace fair exchange policy matching secure data trading

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

Blockchain-Based Robust Data Security Scheme in IoT-Enabled Smart Home

引用

Computers, Materials & Continua 2022年第8期72卷 3549-3570页

作者： Anusha Vangala Ashok Kumar Das youngho park Sajjad Shaukat Jamal Center for Security Theory and Algorithmic ResearchInternational Institute of Information TechnologyHyderabad500032India School of Electronics Engineering Kyungpook National UniversityDaegu41566Korea Department of Mathematics College of ScienceKing Khalid UniversityAbhaSaudi Arabia

The recent surge in development of smart homes and smart cities can be observed in many developed *** the idea to control devices that are in home(embedded with the Internet of Things(IoT)smart devices)by the user who is outside the home might sound fancy,but it comes with a lot of potential *** can be many attackers who will be trying to take advantage of ***,there is a need for designing a secure scheme whichwill be able to distinguish among genuine/authorized users of the system and *** knowing about the details of when and what IoT devices are used by the user,the attacker can trace the daily activities of user and can plan an attack ***,the designed security scheme should guarantee confidentiality,anonymity and *** of the schemes proposed in the literature are either non-blockchain based which involves inherent problems of storing data in a single-server or assuming weaker attack *** this work,we propose a novel scheme based on blockchain technology,assuming a stronger Canetti and Krawczyk(CK)-threat *** the formal and informal security,and comparative analysis,we show that the proposed scheme provides a superior security and more functionality features,with less communication cost and comparable computational cost as compared to other competent ***,the blockchain based simulation study on the proposed scheme has been conducted to show its feasibility in real-life application.

关键词： Internet of things(IoT) smart home ubiquitous computing blockchain security

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

RCEP对韩国经济的影响研究

RCEP对韩国经济的影响研究

引用

作者： youngho park（朴荣浩）华东师范大学

学位级别：硕士

自2011年东盟提议建立区域全面经济伙伴关系（以下简称RCEP）机制以来,东盟10国、中国、日本、韩国、澳大利亚、新西兰、印度等16个国家,以2015年完成协商为目标开始谈判。可是,与这些国家的期待不同,在经历许多波折之后,终于在2020年11... 详细信息

自2011年东盟提议建立区域全面经济伙伴关系（以下简称RCEP）机制以来,东盟10国、中国、日本、韩国、澳大利亚、新西兰、印度等16个国家,以2015年完成协商为目标开始谈判。可是,与这些国家的期待不同,在经历许多波折之后,终于在2020年11月15日,除了印度以外的15个国家结束8年多的漫长谈判过程,在最终协定书上签名,全球规模最大的自由贸易协定正式达成。虽然印度缺席RCEP,而且相比FTA来说,RCEP的贸易自由化程度低,但RCEP对参与国家、亚太地区乃至全球贸易来说,具有较大的意义和影响力。本论文以RCEP对韩国经济的影响为对象,分五章进行研究。第一章为绪论部分,叙述了本论文的研究背景及意义、研究思路、创新点和不足之处。第二章为文献综述,对中英韩文关于RCEP的研究和通过GTAP来分析全球贸易的研究现状进行了梳理和归纳,找出本项研究的问题突破口——从韩国的视角对RCEP进行研究。第三章分五个阶段阐述了RCEP从出台背景、开始谈判到整个谈判过程。第四章是本论文中最核心的部分,使用GTAP10数据库模拟RCEP对韩国经济的影响。首先详细介绍分析方法,之后运用GTAP模型对韩国经济的影响进行详细分析,包括增长效应、福利效应、贸易效应等方面的影响。然后把GTAP模拟结果运用在2020年最新贸易数据上,分析出RCEP对韩国贸易结构的影响。最后一章为结论部分,分析韩国在RCEP中的地位,展望RCEP生效后在落实过程中会发生怎样的变化,并以上述研究结果为基础,从国际视角和国内视角提出相关政策建议。

关键词： RCEP 韩国经济韩国贸易结构全球贸易分析模型

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Electrically focus-tuneable ultrathin lens for high-resolution square subpixels

引用

Light(Science & Applications) 2020年第1期9卷 1066-1078页

作者： Sehong park Gilho Lee Byeongho park youngho Seo Chae bin park Young Tea Chun Chulmin Joo Junsuk Rho Jong Min Kim James Hone Seong Chan Jun School of Mechanical Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea Electrical Engineering Division Engineering DepartmentUniversity of Cambridge9 JJ Thomson AvenueCambridge CB3 OFAUK Department of Electronic Material Engineering Korea Maritime and Ocean UniversityBusan 49112Republic of Korea Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)77 Cheongam-roNam-guPohang 37673Republic of Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)77 Cheongam-roNam-guPohang 37673Republic of Korea Institute for Convergence Research and Education in Advanced Technology Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea Department of Mechanical Engineering Columbia University500 West 120th StreetMudd 220New YorkNY 10027USA

Owing to the tremendous demands for high-resolution pixel-scale thin lenses in displays,we developed a graphenebased ultrathin square subpixel lens(USSL)capable of electrically tuneable focusing(ETF)with a performance competitive with that of a typical mechanical refractive *** fringe field due to a voltage bias in the graphene proves that our ETF-USSL can focus light onto a single point regardless of the wavelength of the visible light—by controlling the carriers at the Dirac point using radially patterned graphene layers,the focal length of the planar structure can be adjusted without changing the curvature or position of the lens.A high focusing efficiency of over 60% at a visible wavelength of 405 nm was achieved with a lens thickness of <13 nm,and a change of 19.42% in the focal length with a 9% increase in transmission was exhibited under a driving *** design is first presented as an ETF-USSL that can be controlled in pixel units of flat panel displays for visible *** can be easily applied as an add-on to high resolution,slim displays and provides a new direction for the application of multifunctional autostereoscopic displays.

关键词： visible driving competitive

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

Speed vernalization to accelerate generation advance in winter cereal crops

引用

Molecular Plant 2022年第8期15卷 1300-1309页

作者： Jin-Kyung Cha Kathryn O'Connor Samir Alahmad Jong-Hee Lee Eric Dinglasan Hyeonjin park So-Myeong Lee Dominique Hirsz Soon-Wook Kwon youngho Kwon Kyeong-Min Kim Jong-Min Ko Lee T.Hickey Dongjin Shin Laura E.Dixon National Institute of Crop Science RDAMiryang 50424Korea School of Biology Faculty of Biological SciencesUniversity of LeedsLeeds LS29JTUK Queensland Alliance for Agriculture and Food Innovation The University of QueenslandSt.LuciaQLDAustralia Department of Plant Bioscience Pusan National UniversityMiryang 60463Korea

There are many challenges facing the development of high-yielding,nutritious crops for future *** limiting factor is generation time,which prolongs research and plant breeding *** advances in speed breeding protocols have dramatically reduced generation time for many short-day and long-day species by optimizing lightand temperature conditions during plant ***,winter crops with a vernalization requirement stillrequire upto 6-10weeks in low-temperature conditions before thetransition to ***,we tested a suite of environmental conditions and protocols to investigate whether the vernalization process can be *** identified a vernalization method consisting of exposing seeds at the soil surface to an extended photoperiod of 22 h day:2 h night at 10°C with transfer to speed breeding conditions that dramatically reduces generation time in both winter wheat(Triticum aestivum)and winter barley(Hordeum vulgare).Implementation of the speedvernalization protocolfollowed byspeedbreedingallowed the completion ofuptofivegenerations per yearforwinter wheat or barley,whereas only two generations can be typically completed under standard vernalization and plant growth *** speed vernalization protocol developed in this study has great potential to accelerate biological research and breeding outcomes for winter crops.

关键词： speed breeding photoperiod temperature wheat barley breeding

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

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

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

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：