Digital transformation has been corner stone of business innovation in the last decade, and these innovations have dramatically changed the definition and boundaries of enterprise business applications. Introduction o...Digital transformation has been corner stone of business innovation in the last decade, and these innovations have dramatically changed the definition and boundaries of enterprise business applications. Introduction of new products/ services, version management of existing products/ services, management of customer/partner connections, management of multi-channel service delivery (web, social media, web etc.), merger/acquisitions of new businesses and adoption of new innovations/technologies will drive data growth in business applications. These datasets exist in different sharing nothing business applications at different locations and in various forms. So, to make sense of this information and derive insight, it is essential to break the data silos, streamline data retrieval and simplify information access across the entire organization. The information access framework must support just-in-time processing capabilities to bring data from multiple sources, be fast and powerful enough to transform and process huge amounts of data quickly, and be agile enough to accommodate new data sources per user needs. This paper discusses the SAP HANA Smart Data Access data-virtualization technology to enable unified access to heterogenous data across the organization and analysis of huge volume of data in real-time using SAP HANA in-memory platform.展开更多
A multilevel secure relation hierarchical data model for multilevel secure database is extended from the relation hierarchical data model in single level environment in this paper. Based on the model, an upper lowe...A multilevel secure relation hierarchical data model for multilevel secure database is extended from the relation hierarchical data model in single level environment in this paper. Based on the model, an upper lower layer relationalintegrity is presented after we analyze and eliminate the covert channels caused by the database integrity.Two SQL statements are extended to process polyinstantiation in the multilevel secure environment.The system based on the multilevel secure relation hierarchical data model is capable of integratively storing and manipulating complicated objects ( e.g. , multilevel spatial data) and conventional data ( e.g. , integer, real number and character string) in multilevel secure database.展开更多
This paper proposes a security policy model for mandatory access control in class B1 database management system whose level of labeling is tuple. The relation hierarchical data model is extended to multilevel relatio...This paper proposes a security policy model for mandatory access control in class B1 database management system whose level of labeling is tuple. The relation hierarchical data model is extended to multilevel relation hierarchical data model. Based on the multilevel relation hierarchical data model, the concept of upper lower layer relational integrity is presented after we analyze and eliminate the covert channels caused by the database integrity. Two SQL statements are extended to process polyinstantiation in the multilevel secure environment. The system is based on the multilevel relation hierarchical data model and is capable of integratively storing and manipulating multilevel complicated objects ( e.g., multilevel spatial data) and multilevel conventional data ( e.g., integer, real number and character string).展开更多
SaaS作为一种热点服务模式,其服务框架的权限控制方面存在数据粒度粗及配置灵活度不足等问题。为此,在RBAC模型的理论基础之上,结合SaaS的特点提出了一种细粒度数据权限控制模型(fine-grained data permission control,FDPC)。该模型首...SaaS作为一种热点服务模式,其服务框架的权限控制方面存在数据粒度粗及配置灵活度不足等问题。为此,在RBAC模型的理论基础之上,结合SaaS的特点提出了一种细粒度数据权限控制模型(fine-grained data permission control,FDPC)。该模型首先将数据对象与企业组织结构映射成不同粒度的数据权限;其次依据企业授权业务需求,采用将功能权限集合和数据权限集合中的对象两两组合的方式,形成组合权限对象,并将其分配给不同角色,从而达到灵活授权和细粒度数据控制的目的;最后选用Spring Security和MyBatis框架,依据AOP切片原理,采用结构化查询语句拼接方式,对FDPC模型进行实现,构建权限控制框架。通过在实际业务系统中应用,结果表明该框架合理可行,有效地提高了权限控制的灵活性。展开更多
基于云环境,借助云平台与云服务设计数据安全访问控制模型,建立用户访问的安全屏障,准确识别用户身份,并根据用户的人力资源属性,授予用户相应的访问权限与操作权限,对于云环境下数据安全访问有着重要作用。文章采用基于新任务角色的访...基于云环境,借助云平台与云服务设计数据安全访问控制模型,建立用户访问的安全屏障,准确识别用户身份,并根据用户的人力资源属性,授予用户相应的访问权限与操作权限,对于云环境下数据安全访问有着重要作用。文章采用基于新任务角色的访问控制(New Task Role Based Access Control,NT-RBAC)模型设计了数据安全访问控制模型,以期为相关研究提供借鉴。展开更多
文摘Digital transformation has been corner stone of business innovation in the last decade, and these innovations have dramatically changed the definition and boundaries of enterprise business applications. Introduction of new products/ services, version management of existing products/ services, management of customer/partner connections, management of multi-channel service delivery (web, social media, web etc.), merger/acquisitions of new businesses and adoption of new innovations/technologies will drive data growth in business applications. These datasets exist in different sharing nothing business applications at different locations and in various forms. So, to make sense of this information and derive insight, it is essential to break the data silos, streamline data retrieval and simplify information access across the entire organization. The information access framework must support just-in-time processing capabilities to bring data from multiple sources, be fast and powerful enough to transform and process huge amounts of data quickly, and be agile enough to accommodate new data sources per user needs. This paper discusses the SAP HANA Smart Data Access data-virtualization technology to enable unified access to heterogenous data across the organization and analysis of huge volume of data in real-time using SAP HANA in-memory platform.
文摘A multilevel secure relation hierarchical data model for multilevel secure database is extended from the relation hierarchical data model in single level environment in this paper. Based on the model, an upper lower layer relationalintegrity is presented after we analyze and eliminate the covert channels caused by the database integrity.Two SQL statements are extended to process polyinstantiation in the multilevel secure environment.The system based on the multilevel secure relation hierarchical data model is capable of integratively storing and manipulating complicated objects ( e.g. , multilevel spatial data) and conventional data ( e.g. , integer, real number and character string) in multilevel secure database.
文摘This paper proposes a security policy model for mandatory access control in class B1 database management system whose level of labeling is tuple. The relation hierarchical data model is extended to multilevel relation hierarchical data model. Based on the multilevel relation hierarchical data model, the concept of upper lower layer relational integrity is presented after we analyze and eliminate the covert channels caused by the database integrity. Two SQL statements are extended to process polyinstantiation in the multilevel secure environment. The system is based on the multilevel relation hierarchical data model and is capable of integratively storing and manipulating multilevel complicated objects ( e.g., multilevel spatial data) and multilevel conventional data ( e.g., integer, real number and character string).
文摘SaaS作为一种热点服务模式,其服务框架的权限控制方面存在数据粒度粗及配置灵活度不足等问题。为此,在RBAC模型的理论基础之上,结合SaaS的特点提出了一种细粒度数据权限控制模型(fine-grained data permission control,FDPC)。该模型首先将数据对象与企业组织结构映射成不同粒度的数据权限;其次依据企业授权业务需求,采用将功能权限集合和数据权限集合中的对象两两组合的方式,形成组合权限对象,并将其分配给不同角色,从而达到灵活授权和细粒度数据控制的目的;最后选用Spring Security和MyBatis框架,依据AOP切片原理,采用结构化查询语句拼接方式,对FDPC模型进行实现,构建权限控制框架。通过在实际业务系统中应用,结果表明该框架合理可行,有效地提高了权限控制的灵活性。
文摘基于云环境,借助云平台与云服务设计数据安全访问控制模型,建立用户访问的安全屏障,准确识别用户身份,并根据用户的人力资源属性,授予用户相应的访问权限与操作权限,对于云环境下数据安全访问有着重要作用。文章采用基于新任务角色的访问控制(New Task Role Based Access Control,NT-RBAC)模型设计了数据安全访问控制模型,以期为相关研究提供借鉴。
