Web service is characterized by its isomerism and loose coupling;thus greatly facilitate the application of operation in distributed situation,but its disadvantages cause serious safety problems.The principium and cha...Web service is characterized by its isomerism and loose coupling;thus greatly facilitate the application of operation in distributed situation,but its disadvantages cause serious safety problems.The principium and characteristic of Web service classical attack technology are expatiated,classical attack techniques are classified,and attack technology is simulated,and then,the directions and the future of Web security are discussed.展开更多
Providing reliable compositions of Web Services is a challenging issue since the workflow architect often has only a limited control over the reliability of the composed services. The architect can instead achieve rel...Providing reliable compositions of Web Services is a challenging issue since the workflow architect often has only a limited control over the reliability of the composed services. The architect can instead achieve reliability by properly planning the workflow architecture. To this end he must be able to evaluate and compare the reliability of multiple architectural solutions. In this paper we present a useful tool which allows to conduct reliability analysis on planned workflows, as well as to compare the reliability of alternative solutions in a what-if analysis. The tool is implemented as a plug-in for the widely adopted Active BPEL Designer and exploits the concept of reliability pattern to evaluate the reliability formula of the workflow. The effectiveness of the approach and the operation of the tool are demonstrated with respect to a case study of a business security infrastructure realized by orchestrating simple security services.展开更多
文摘Web service is characterized by its isomerism and loose coupling;thus greatly facilitate the application of operation in distributed situation,but its disadvantages cause serious safety problems.The principium and characteristic of Web service classical attack technology are expatiated,classical attack techniques are classified,and attack technology is simulated,and then,the directions and the future of Web security are discussed.
文摘Providing reliable compositions of Web Services is a challenging issue since the workflow architect often has only a limited control over the reliability of the composed services. The architect can instead achieve reliability by properly planning the workflow architecture. To this end he must be able to evaluate and compare the reliability of multiple architectural solutions. In this paper we present a useful tool which allows to conduct reliability analysis on planned workflows, as well as to compare the reliability of alternative solutions in a what-if analysis. The tool is implemented as a plug-in for the widely adopted Active BPEL Designer and exploits the concept of reliability pattern to evaluate the reliability formula of the workflow. The effectiveness of the approach and the operation of the tool are demonstrated with respect to a case study of a business security infrastructure realized by orchestrating simple security services.
