Cloud computing is very useful for big data owner who doesn't want to manage IT infrastructure and big data technique details. However, it is hard for big data owner to trust multi-layer outsourced big data system...Cloud computing is very useful for big data owner who doesn't want to manage IT infrastructure and big data technique details. However, it is hard for big data owner to trust multi-layer outsourced big data system in cloud environment and to verify which outsourced service leads to the problem. Similarly, the cloud service provider cannot simply trust the data computation applications. At last,the verification data itself may also leak the sensitive information from the cloud service provider and data owner. We propose a new three-level definition of the verification, threat model, corresponding trusted policies based on different roles for outsourced big data system in cloud. We also provide two policy enforcement methods for building trusted data computation environment by measuring both the Map Reduce application and its behaviors based on trusted computing and aspect-oriented programming. To prevent sensitive information leakage from verification process,we provide a privacy-preserved verification method. Finally, we implement the TPTVer, a Trusted third Party based Trusted Verifier as a proof of concept system. Our evaluation and analysis show that TPTVer can provide trusted verification for multi-layered outsourced big data system in the cloud with low overhead.展开更多
在实际应用中,多所有者RFID标签的所有权不仅是由于标签的所有者发生了变化而改变,每个所有者所占有的权重比例发生变化也会导致标签的所有权发生改变。因此,文中提出了一种带可信第三方(Trusted Third Party,TTP)的多所有者内部权重变...在实际应用中,多所有者RFID标签的所有权不仅是由于标签的所有者发生了变化而改变,每个所有者所占有的权重比例发生变化也会导致标签的所有权发生改变。因此,文中提出了一种带可信第三方(Trusted Third Party,TTP)的多所有者内部权重变化标签所有权协议用以解决该问题,因为存在TTP参与所有权的转换,所以所有者完全地将对标签的所有权转移给了权重变化后的所有者,即具备原所有者无关性。该协议采用了Lagrange多项式插值法和Shamir秘密共享门限方案,并使用GNY逻辑进行了安全性分析,结果表明该协议能抵抗转换过程中的多种攻击。同时,仿真实验结果表明标签耗时和计算量都处于可接受的范围之内。展开更多
分布式云存储技术为数量日益庞大的机载软件提供了新的分发与存储方式,这意味着航空公司失去了对软件的直接控制,因此机载软件安全成为了航空公司十分关注的问题。为了提高云存储环境下机载软件的安全性,提出了一种基于可信隐式第三方(T...分布式云存储技术为数量日益庞大的机载软件提供了新的分发与存储方式,这意味着航空公司失去了对软件的直接控制,因此机载软件安全成为了航空公司十分关注的问题。为了提高云存储环境下机载软件的安全性,提出了一种基于可信隐式第三方(Trusted Implicit Third Party,TITP)的机载软件审计方法对云上机载软件进行监控与管理,以确保机载软件的完整性。此外,由部署在云端的可信硬件代替用户进行审计工作,解决了可公开验证审计机制中第三方审计者不完全可信的问题,并以日志的方式记录审计结果以供用户查询。运用可信硬件进行完整性验证不仅降低了用户计算成本,而且缩短了用户在线时间。与其他可信隐式第三方审计方法进行实验对比,所提方法在审计计算过程中节省了10%的时间消耗。展开更多
Initial trust has been proved to be a crucial antecedent of Proper Risk Allocation(PRA)which benefits the improvement of construction project management.However,In the context of China,employer’s lack of trust in the...Initial trust has been proved to be a crucial antecedent of Proper Risk Allocation(PRA)which benefits the improvement of construction project management.However,In the context of China,employer’s lack of trust in the unfamiliar contractor without prior trade experience is the main obstacle that prevents employer from using the RPA.The aim of this paper is to create a better understanding of a specific path of building trust named trust transfer.In this paper,we first reviews related literatures and sum up the main feature of the trust transfer from the other context(e.g.E-business),and proposed the conceptualization of trust transfer in construction project marketplace.And then,according the feature of the trust transfer,we describe the basic model of the trust transfer in the construction project marketplace including employer as the trustor,the third party(source)and the unfamiliar contractor as trustee(target),and the relationship between these three nodes.At last,we analyze the type of the third party and the relationship of the trust transfer in the context of construction project.展开更多
. In this paper, the main driving factors affecting the customer loyalty of a third party mobile payment service were chosen by combining with the actual situation of the third party mobile payment service and custome.... In this paper, the main driving factors affecting the customer loyalty of a third party mobile payment service were chosen by combining with the actual situation of the third party mobile payment service and customer spending habits in China. The assumed relations between all affecting factors and the customer loyalty of a third party mobile payment platform were proposed, and a model for studying customer loyalty was established and also a conclusion was made through the questionnaire survey analysis data. Finally, suggestions on improving the loyalty of the customers of a third party mobile payment platform are presented.展开更多
基金partially supported by grants from the China 863 High-tech Program (Grant No. 2015AA016002)the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20131103120001)+2 种基金the National Key Research and Development Program of China (Grant No. 2016YFB0800204)the National Science Foundation of China (No. 61502017)the Scientific Research Common Program of Beijing Municipal Commission of Education (KM201710005024)
文摘Cloud computing is very useful for big data owner who doesn't want to manage IT infrastructure and big data technique details. However, it is hard for big data owner to trust multi-layer outsourced big data system in cloud environment and to verify which outsourced service leads to the problem. Similarly, the cloud service provider cannot simply trust the data computation applications. At last,the verification data itself may also leak the sensitive information from the cloud service provider and data owner. We propose a new three-level definition of the verification, threat model, corresponding trusted policies based on different roles for outsourced big data system in cloud. We also provide two policy enforcement methods for building trusted data computation environment by measuring both the Map Reduce application and its behaviors based on trusted computing and aspect-oriented programming. To prevent sensitive information leakage from verification process,we provide a privacy-preserved verification method. Finally, we implement the TPTVer, a Trusted third Party based Trusted Verifier as a proof of concept system. Our evaluation and analysis show that TPTVer can provide trusted verification for multi-layered outsourced big data system in the cloud with low overhead.
文摘在实际应用中,多所有者RFID标签的所有权不仅是由于标签的所有者发生了变化而改变,每个所有者所占有的权重比例发生变化也会导致标签的所有权发生改变。因此,文中提出了一种带可信第三方(Trusted Third Party,TTP)的多所有者内部权重变化标签所有权协议用以解决该问题,因为存在TTP参与所有权的转换,所以所有者完全地将对标签的所有权转移给了权重变化后的所有者,即具备原所有者无关性。该协议采用了Lagrange多项式插值法和Shamir秘密共享门限方案,并使用GNY逻辑进行了安全性分析,结果表明该协议能抵抗转换过程中的多种攻击。同时,仿真实验结果表明标签耗时和计算量都处于可接受的范围之内。
文摘分布式云存储技术为数量日益庞大的机载软件提供了新的分发与存储方式,这意味着航空公司失去了对软件的直接控制,因此机载软件安全成为了航空公司十分关注的问题。为了提高云存储环境下机载软件的安全性,提出了一种基于可信隐式第三方(Trusted Implicit Third Party,TITP)的机载软件审计方法对云上机载软件进行监控与管理,以确保机载软件的完整性。此外,由部署在云端的可信硬件代替用户进行审计工作,解决了可公开验证审计机制中第三方审计者不完全可信的问题,并以日志的方式记录审计结果以供用户查询。运用可信硬件进行完整性验证不仅降低了用户计算成本,而且缩短了用户在线时间。与其他可信隐式第三方审计方法进行实验对比,所提方法在审计计算过程中节省了10%的时间消耗。
文摘Initial trust has been proved to be a crucial antecedent of Proper Risk Allocation(PRA)which benefits the improvement of construction project management.However,In the context of China,employer’s lack of trust in the unfamiliar contractor without prior trade experience is the main obstacle that prevents employer from using the RPA.The aim of this paper is to create a better understanding of a specific path of building trust named trust transfer.In this paper,we first reviews related literatures and sum up the main feature of the trust transfer from the other context(e.g.E-business),and proposed the conceptualization of trust transfer in construction project marketplace.And then,according the feature of the trust transfer,we describe the basic model of the trust transfer in the construction project marketplace including employer as the trustor,the third party(source)and the unfamiliar contractor as trustee(target),and the relationship between these three nodes.At last,we analyze the type of the third party and the relationship of the trust transfer in the context of construction project.
文摘. In this paper, the main driving factors affecting the customer loyalty of a third party mobile payment service were chosen by combining with the actual situation of the third party mobile payment service and customer spending habits in China. The assumed relations between all affecting factors and the customer loyalty of a third party mobile payment platform were proposed, and a model for studying customer loyalty was established and also a conclusion was made through the questionnaire survey analysis data. Finally, suggestions on improving the loyalty of the customers of a third party mobile payment platform are presented.
