This paper describes the formal verification of the Merchant Registration phase of the Secure Electronic Transactions (SET) protocol, a realistic electronic transaction security protocol which is used to protect the s...This paper describes the formal verification of the Merchant Registration phase of the Secure Electronic Transactions (SET) protocol, a realistic electronic transaction security protocol which is used to protect the secrecy of online purchases. A number of concepts, notations, functions, predicates, assumptions and rules are introduced. We describe the knowledge of all legal participants, and a malicious spy, to assess the security of the sub-protocol. Avoiding search in a large state space, the method converges very quickly. We implemented our method in the Isabelle/Isar automated reasoning environment, therefore the whole verification process can be executed mechanically and efficiently. Keywords Formal verification - electronic transaction protocol - knowledge-based system This work was supported by EC, EPSRC, the National Natural Science Foundation of China (No.60496320, 60496321), and Hong Kong K C Wang Education Foundation.Xiao-Qi Ma graduated from Nanjing University of Science and Technology, China, in 1997. He received his Master’s degree from the Institute of Software, Chinese Academy of Sciences in 2003. He is currently a PhD student at the University of Reading. His research interests include computer network security, knowledge-based systems, and operating systems.Xiao-Chun Cheng obtained his PhD in 1996. He has worked as a lecturer at the University of Reading since 2000. He is a vip professor at North East Normal University and Beijing Normal University. His research interests include theoretical and applied aspects in decision support systems, knowledge-based systems and intelligent systems.展开更多
An active queue management（AQM） algorithm called MCHOKeM is presented,which is borrowed from CHOKeW that draws multi-packets at random from the buffer,the multi-packets are compared with an arriving packet and aband...An active queue management（AQM） algorithm called MCHOKeM is presented,which is borrowed from CHOKeW that draws multi-packets at random from the buffer,the multi-packets are compared with an arriving packet and abandoned if they are from the same flow.But MCHOKeM uses multiple virtual queues for different priority packets and enhances the drawing function by adjusting the maximum number of draws based on the current status of virtual queue length.The number of parameters that MCHOKeM needs to maintain is determined by the number of priority levels being supported by the router,which usually has a small limited value.In order to explain the features of MCHOKeM,an analytical model is used.A series of simulation tests to evaluate the performance are given.展开更多
Nowadays, more and more digitalized spatial data are sold and transmitted on the Internet. Thus, there arises an important issue about copyright protection of the digital data. To solve this problem, this paper has de...Nowadays, more and more digitalized spatial data are sold and transmitted on the Internet. Thus, there arises an important issue about copyright protection of the digital data. To solve this problem, this paper has designed and implemented a spatial data watermarking service (SDWS) system which can provide a secure framework for data transaction and transfer via the Internet and protect the rights of both copyright owners and consumers at the same time.展开更多
Composite Web services provide promising prospects for conducting cross-organizational Web service transactions. Such transactions generally require longer processing time and manipulate financially critical data. To ...Composite Web services provide promising prospects for conducting cross-organizational Web service transactions. Such transactions generally require longer processing time and manipulate financially critical data. To efficiently manage these Web services transactions, isolation is commonly relaxed, but inconsistency will be caused by concurrently executing isolation-relaxing transactions. This article proposes an extension to the WS-Business Activity Protocol, which ensures the consistent executions of isolation-relaxing Web service transactions, and which is based on transaction dependency graphs distributed over multiple nodes. Furthermore, this article presents several algorithms implementing the protocol, and introduces the implement of a prototype system.展开更多
基金This work was supported by EC, EPSRC, the National Natural Science Foundation of China (No.60496320, 60496321)and Hong Kong K C Wang Education Foundation.
文摘This paper describes the formal verification of the Merchant Registration phase of the Secure Electronic Transactions (SET) protocol, a realistic electronic transaction security protocol which is used to protect the secrecy of online purchases. A number of concepts, notations, functions, predicates, assumptions and rules are introduced. We describe the knowledge of all legal participants, and a malicious spy, to assess the security of the sub-protocol. Avoiding search in a large state space, the method converges very quickly. We implemented our method in the Isabelle/Isar automated reasoning environment, therefore the whole verification process can be executed mechanically and efficiently. Keywords Formal verification - electronic transaction protocol - knowledge-based system This work was supported by EC, EPSRC, the National Natural Science Foundation of China (No.60496320, 60496321), and Hong Kong K C Wang Education Foundation.Xiao-Qi Ma graduated from Nanjing University of Science and Technology, China, in 1997. He received his Master’s degree from the Institute of Software, Chinese Academy of Sciences in 2003. He is currently a PhD student at the University of Reading. His research interests include computer network security, knowledge-based systems, and operating systems.Xiao-Chun Cheng obtained his PhD in 1996. He has worked as a lecturer at the University of Reading since 2000. He is a vip professor at North East Normal University and Beijing Normal University. His research interests include theoretical and applied aspects in decision support systems, knowledge-based systems and intelligent systems.
基金supported by the Beijing Natural Science Foundation(4102050)USFC-KOSEF Joint Research Project of China and Korea(60811140343)
文摘An active queue management（AQM） algorithm called MCHOKeM is presented,which is borrowed from CHOKeW that draws multi-packets at random from the buffer,the multi-packets are compared with an arriving packet and abandoned if they are from the same flow.But MCHOKeM uses multiple virtual queues for different priority packets and enhances the drawing function by adjusting the maximum number of draws based on the current status of virtual queue length.The number of parameters that MCHOKeM needs to maintain is determined by the number of priority levels being supported by the router,which usually has a small limited value.In order to explain the features of MCHOKeM,an analytical model is used.A series of simulation tests to evaluate the performance are given.
基金Supported by the National High Technology Research and Development Program of China(No.2006AA12Z210)
文摘Nowadays, more and more digitalized spatial data are sold and transmitted on the Internet. Thus, there arises an important issue about copyright protection of the digital data. To solve this problem, this paper has designed and implemented a spatial data watermarking service (SDWS) system which can provide a secure framework for data transaction and transfer via the Internet and protect the rights of both copyright owners and consumers at the same time.
基金supported by the National Key Technology R&D Program (2007BAH17B04)Natural Science Foundation of Jiangsu Province (BK2007603)+1 种基金Research Climbing Project of NJUPT (NY207062)Qin-Lan Project of NJUPT (NY208024)
文摘Composite Web services provide promising prospects for conducting cross-organizational Web service transactions. Such transactions generally require longer processing time and manipulate financially critical data. To efficiently manage these Web services transactions, isolation is commonly relaxed, but inconsistency will be caused by concurrently executing isolation-relaxing transactions. This article proposes an extension to the WS-Business Activity Protocol, which ensures the consistent executions of isolation-relaxing Web service transactions, and which is based on transaction dependency graphs distributed over multiple nodes. Furthermore, this article presents several algorithms implementing the protocol, and introduces the implement of a prototype system.
