在云计算作为辅助的电子医疗系统中,患者的电子医疗记录(Electronic Healthcare Records,EHRs)通常会外包给云服务器提供商(Cloud Server Provider,CSP),其中EHRs一般会以加密的形式上传到云服务器,再通过可搜索加密方案进行搜索.然而,...在云计算作为辅助的电子医疗系统中,患者的电子医疗记录(Electronic Healthcare Records,EHRs)通常会外包给云服务器提供商(Cloud Server Provider,CSP),其中EHRs一般会以加密的形式上传到云服务器,再通过可搜索加密方案进行搜索.然而,由于过度依赖于被认为可完全信任的中心化服务器,现有的大多数可搜索加密方案仍面临着严重的安全问题.论文提出了一个面向医疗系统的区块链的可搜索加密方案,它不仅可以确保EHRs的安全,还可以提高存储在云服务器上的密码文本的搜索效率.在方案中,患者可以利用智能合约构建自动执行与自动查找的算法,这使医生收到可信的、正确的搜索结果.同时,方案采用了基于关键词转换的高效的模糊多关键词可搜索加密,优化EHRs的提取方式进而减少计算开销.此外,方案做了安全性分析和性能评估,证明方案的有效性和安全性.展开更多
OGSA(Open Grid Services Architecture) is called the next generation grid architecture. It evolves from theearly five levels hourglass model architecture. OGSA consists of two key technologies: grid technology and Web ...OGSA(Open Grid Services Architecture) is called the next generation grid architecture. It evolves from theearly five levels hourglass model architecture. OGSA consists of two key technologies: grid technology and Web Ser-vice technology. OGSA gives emphasis to services and all things in OGSA are services. After explaining the basic ideaof OGSA,this paper introduces the composition of OGSA-based hosting environment and virtual organization. Todemonstrate the process of how an application is executed in an OGSA-based environment,the paper gives an exampleof data mining which illustrates the basic functions and working mechanism of OGSA. A brief comparison to relatedgrid architecture is also given in the paper. The paper concludes that OGSA is not mature and it needs improvementtogether with related technology and grid applications.展开更多
文摘在云计算作为辅助的电子医疗系统中,患者的电子医疗记录(Electronic Healthcare Records,EHRs)通常会外包给云服务器提供商(Cloud Server Provider,CSP),其中EHRs一般会以加密的形式上传到云服务器,再通过可搜索加密方案进行搜索.然而,由于过度依赖于被认为可完全信任的中心化服务器,现有的大多数可搜索加密方案仍面临着严重的安全问题.论文提出了一个面向医疗系统的区块链的可搜索加密方案,它不仅可以确保EHRs的安全,还可以提高存储在云服务器上的密码文本的搜索效率.在方案中,患者可以利用智能合约构建自动执行与自动查找的算法,这使医生收到可信的、正确的搜索结果.同时,方案采用了基于关键词转换的高效的模糊多关键词可搜索加密,优化EHRs的提取方式进而减少计算开销.此外,方案做了安全性分析和性能评估,证明方案的有效性和安全性.
文摘OGSA(Open Grid Services Architecture) is called the next generation grid architecture. It evolves from theearly five levels hourglass model architecture. OGSA consists of two key technologies: grid technology and Web Ser-vice technology. OGSA gives emphasis to services and all things in OGSA are services. After explaining the basic ideaof OGSA,this paper introduces the composition of OGSA-based hosting environment and virtual organization. Todemonstrate the process of how an application is executed in an OGSA-based environment,the paper gives an exampleof data mining which illustrates the basic functions and working mechanism of OGSA. A brief comparison to relatedgrid architecture is also given in the paper. The paper concludes that OGSA is not mature and it needs improvementtogether with related technology and grid applications.
