安全性在电子交易系统中是一个至关重要的问题,该文对传统的电子商务和基于 Mobile Agent的电子交易的安全问题进行了比较,提出了在Grasshopper平台下采用时间限 制的黑箱安全机制和加密跟踪的方法扩展平台本身的安全性,确保了Grassh...安全性在电子交易系统中是一个至关重要的问题,该文对传统的电子商务和基于 Mobile Agent的电子交易的安全问题进行了比较,提出了在Grasshopper平台下采用时间限 制的黑箱安全机制和加密跟踪的方法扩展平台本身的安全性,确保了Grasshopper平台在实 现电子交易过程中整个系统的安全性。展开更多
The problem of maintaining data consistency in mobile broadcast environments is researched. Quasi serializability is formally defined and analyzed at first. It was shown that quasi serializability is less stringent th...The problem of maintaining data consistency in mobile broadcast environments is researched. Quasi serializability is formally defined and analyzed at first. It was shown that quasi serializability is less stringent than serializability when database consistency is maintained for transactions. Then, corresponding concurrency control protocol that supports both update transactions and read-only transactions is outlined for mobile broadcast environments. Finally, the simulation results confirmed that the proposed protocol could improve the response time significantly.展开更多
In recent decades, day-to-day lifestyle requires online payments as easy and simple solutions to several financial transactions, which makes the concept of Electronic payment Systems very popular in the growth of a ca...In recent decades, day-to-day lifestyle requires online payments as easy and simple solutions to several financial transactions, which makes the concept of Electronic payment Systems very popular in the growth of a cashless society. In fact, cashless transactions through simple mobile apps are not merely a concept anymore rather are implemented robustly and being used extensively. On the dark side, obvious financial benefits are making these apps vulnerable to being attacked, which can be successful through security breaches. These cybersecurity issues need to be traced out and resolved to make the financial transactions through an app secure and trustworthy. In this paper, several related papers are analyzed to trace out possible cybersecurity issues in the domain of Electronic Transaction System. The objective is to establish sufficient theoretical background to propose methodologies for measuring security issues and also identify the security strength of any FinTech application and provide standard security metrics.展开更多
Contactless mobile payment devices are fast, convenient and user friendly means for executing small value business transactions. This kind of transactions is preferred to be executed conveniently and on the fly by jus...Contactless mobile payment devices are fast, convenient and user friendly means for executing small value business transactions. This kind of transactions is preferred to be executed conveniently and on the fly by just tapping a mobile payment device to a mobile terminal. Mobility, convenience and fast transaction execution are very important payment system properties in potentially crowded places such as in public transportation. These properties are in practice causing transaction execution problems, such as: delays in offline transaction execution, transaction atomicity failures caused by mobile data communication drops, lack of central control on mobile transaction system components and increased vulnerability risk caused by easy physical access to the mobile transaction system components. This paper describes a holistic transaction processing model for resolving mentioned problems in micropayment mobile touch-and-go transaction systems. Defined processing model was implemented on real public transportation mobile payment system where it was proven as a robust solution for execution of small value touch-and-go mobile ticketing transactions.展开更多
全向移动操作机器人(Omni-directional Mobile Manipulating Robots,OMMR)是由全向移动平台以及在平台上加装一个或多个操作臂组成的具有主动作业能力的新型机器人系统。在移动平台上加装操作臂后,整个系统动力学行为的复杂性将会因为...全向移动操作机器人(Omni-directional Mobile Manipulating Robots,OMMR)是由全向移动平台以及在平台上加装一个或多个操作臂组成的具有主动作业能力的新型机器人系统。在移动平台上加装操作臂后,整个系统动力学行为的复杂性将会因为移动平台与操作臂之间的耦合效应而大大增加,涉及地面-移动平台、移动平台-操作臂、操作臂-操作环境的动态交互,给系统的建模带来极大困难。在建立OMMR运动学、静力学模型的基础上,提出了一种简化的OMMR系统动力学建模方法;基于该动力学模型,建立车-臂交互作用模型并对其交互作用进行分析。仿真和实验验证了车-臂交互作用模型的正确性,间接证明了所提OMMR系统动力学建模方法的合理性和有效性,为机器人运动规划和运动控制提供了模型数据。展开更多
文摘安全性在电子交易系统中是一个至关重要的问题,该文对传统的电子商务和基于 Mobile Agent的电子交易的安全问题进行了比较,提出了在Grasshopper平台下采用时间限 制的黑箱安全机制和加密跟踪的方法扩展平台本身的安全性,确保了Grasshopper平台在实 现电子交易过程中整个系统的安全性。
文摘The problem of maintaining data consistency in mobile broadcast environments is researched. Quasi serializability is formally defined and analyzed at first. It was shown that quasi serializability is less stringent than serializability when database consistency is maintained for transactions. Then, corresponding concurrency control protocol that supports both update transactions and read-only transactions is outlined for mobile broadcast environments. Finally, the simulation results confirmed that the proposed protocol could improve the response time significantly.
文摘In recent decades, day-to-day lifestyle requires online payments as easy and simple solutions to several financial transactions, which makes the concept of Electronic payment Systems very popular in the growth of a cashless society. In fact, cashless transactions through simple mobile apps are not merely a concept anymore rather are implemented robustly and being used extensively. On the dark side, obvious financial benefits are making these apps vulnerable to being attacked, which can be successful through security breaches. These cybersecurity issues need to be traced out and resolved to make the financial transactions through an app secure and trustworthy. In this paper, several related papers are analyzed to trace out possible cybersecurity issues in the domain of Electronic Transaction System. The objective is to establish sufficient theoretical background to propose methodologies for measuring security issues and also identify the security strength of any FinTech application and provide standard security metrics.
文摘Contactless mobile payment devices are fast, convenient and user friendly means for executing small value business transactions. This kind of transactions is preferred to be executed conveniently and on the fly by just tapping a mobile payment device to a mobile terminal. Mobility, convenience and fast transaction execution are very important payment system properties in potentially crowded places such as in public transportation. These properties are in practice causing transaction execution problems, such as: delays in offline transaction execution, transaction atomicity failures caused by mobile data communication drops, lack of central control on mobile transaction system components and increased vulnerability risk caused by easy physical access to the mobile transaction system components. This paper describes a holistic transaction processing model for resolving mentioned problems in micropayment mobile touch-and-go transaction systems. Defined processing model was implemented on real public transportation mobile payment system where it was proven as a robust solution for execution of small value touch-and-go mobile ticketing transactions.
文摘全向移动操作机器人(Omni-directional Mobile Manipulating Robots,OMMR)是由全向移动平台以及在平台上加装一个或多个操作臂组成的具有主动作业能力的新型机器人系统。在移动平台上加装操作臂后,整个系统动力学行为的复杂性将会因为移动平台与操作臂之间的耦合效应而大大增加,涉及地面-移动平台、移动平台-操作臂、操作臂-操作环境的动态交互,给系统的建模带来极大困难。在建立OMMR运动学、静力学模型的基础上,提出了一种简化的OMMR系统动力学建模方法;基于该动力学模型,建立车-臂交互作用模型并对其交互作用进行分析。仿真和实验验证了车-臂交互作用模型的正确性,间接证明了所提OMMR系统动力学建模方法的合理性和有效性,为机器人运动规划和运动控制提供了模型数据。