Based on convenience and safety of historical data application, B/S mode is used instead of database management structure of C/S mode, and it can not only combine database and network, but also realize the safe use of...Based on convenience and safety of historical data application, B/S mode is used instead of database management structure of C/S mode, and it can not only combine database and network, but also realize the safe use of historical data online. High-level programming language is used to develop a online management and application system of historical meteorological data based on B/S mode. System data import function can import ground report file sequence of Xuzhou （ including five county-level stations） into the database, construct Oracle database of Xuzhou and the five stations since 1953, and establish data tables of time, day, ten-day, monthly, quarterly and annual historical data, weather information and so forth. Management software of database server is established to realize instruction-level management and scheduling of database and a balanced distribution of resources among users. At the same time, a Web-based management application interface is set up to meet users＇ needs to retrieve a variety of repositories, and it provides statistical query of time, day, ten-day, monthly, quarterly and annual historical data and climate data for each meteorological element, thereby meeting the needs of meteorological research and all sectors of society for statistical query of meteorological data.展开更多
In the era of big data,the ways people work,live and think have changed dramatically,and the social governance system is also being restructured.Achieving intelligent social governance has now become a national strate...In the era of big data,the ways people work,live and think have changed dramatically,and the social governance system is also being restructured.Achieving intelligent social governance has now become a national strategy.The application of big data technology to counterterrorism efforts has become a powerful weapon for all countries.However,due to the uncertainty,difficulty of interpretation and potential risk of discrimination in big data technology and algorithm models,basic human rights,freedom and even ethics are likely to be impacted and challenged.As a result,there is an urgent need to prioritize basic human rights and regulate the application of big data for counter terrorism purposes.The legislation and law enforcement regarding the use of big data to counter terrorism must be subject to constitutional and other legal reviews,so as to strike a balance between safeguarding national security and protecting basic human rights.展开更多
如今为了验证云端数据的完整性,研究者提出了多个数据完整性审计协议.然而,这些协议通常要求用户将数据块、标签以及一些辅助验证数据外包给云,并使用复杂度较高的加密算法进行验证.这些缺点导致了云服务需要消耗额外的存储开销和计算开...如今为了验证云端数据的完整性,研究者提出了多个数据完整性审计协议.然而,这些协议通常要求用户将数据块、标签以及一些辅助验证数据外包给云,并使用复杂度较高的加密算法进行验证.这些缺点导致了云服务需要消耗额外的存储开销和计算开销.针对上述问题,本文提出一种基于代数恒等式的数据持有性证明协议.首先,该协议使用简单的代数运算降低了验证算法运行的时间开销.其次,云服务提供商仅需存储标签而无需存储原始数据便可响应验证请求.此外,本文方案还可以与其它文件加密算法相结合进一步增强对数据的隐私保护.然后,本文提出了C-DLIT框架以支持数据动态操作并可实现全局审计.最后通过理论分析与实验对比,本文证明了该方案既可以保证数据的隐私性,又能够有效抵御恶意攻击.实现结果表明:在验证执行时间方面,相较于数据持有性证明协议(Provable Data Possession,PDP)的10-2秒级耗时与数据可恢复性证明协议(Proofs of Retrievability,PoR)的秒级耗时,本文方案可以把时间减少到2毫秒以内.展开更多
文摘Based on convenience and safety of historical data application, B/S mode is used instead of database management structure of C/S mode, and it can not only combine database and network, but also realize the safe use of historical data online. High-level programming language is used to develop a online management and application system of historical meteorological data based on B/S mode. System data import function can import ground report file sequence of Xuzhou （ including five county-level stations） into the database, construct Oracle database of Xuzhou and the five stations since 1953, and establish data tables of time, day, ten-day, monthly, quarterly and annual historical data, weather information and so forth. Management software of database server is established to realize instruction-level management and scheduling of database and a balanced distribution of resources among users. At the same time, a Web-based management application interface is set up to meet users＇ needs to retrieve a variety of repositories, and it provides statistical query of time, day, ten-day, monthly, quarterly and annual historical data and climate data for each meteorological element, thereby meeting the needs of meteorological research and all sectors of society for statistical query of meteorological data.
文摘In the era of big data,the ways people work,live and think have changed dramatically,and the social governance system is also being restructured.Achieving intelligent social governance has now become a national strategy.The application of big data technology to counterterrorism efforts has become a powerful weapon for all countries.However,due to the uncertainty,difficulty of interpretation and potential risk of discrimination in big data technology and algorithm models,basic human rights,freedom and even ethics are likely to be impacted and challenged.As a result,there is an urgent need to prioritize basic human rights and regulate the application of big data for counter terrorism purposes.The legislation and law enforcement regarding the use of big data to counter terrorism must be subject to constitutional and other legal reviews,so as to strike a balance between safeguarding national security and protecting basic human rights.
文摘如今为了验证云端数据的完整性,研究者提出了多个数据完整性审计协议.然而,这些协议通常要求用户将数据块、标签以及一些辅助验证数据外包给云,并使用复杂度较高的加密算法进行验证.这些缺点导致了云服务需要消耗额外的存储开销和计算开销.针对上述问题,本文提出一种基于代数恒等式的数据持有性证明协议.首先,该协议使用简单的代数运算降低了验证算法运行的时间开销.其次,云服务提供商仅需存储标签而无需存储原始数据便可响应验证请求.此外,本文方案还可以与其它文件加密算法相结合进一步增强对数据的隐私保护.然后,本文提出了C-DLIT框架以支持数据动态操作并可实现全局审计.最后通过理论分析与实验对比,本文证明了该方案既可以保证数据的隐私性,又能够有效抵御恶意攻击.实现结果表明:在验证执行时间方面,相较于数据持有性证明协议(Provable Data Possession,PDP)的10-2秒级耗时与数据可恢复性证明协议(Proofs of Retrievability,PoR)的秒级耗时,本文方案可以把时间减少到2毫秒以内.
