Protecting web services from DoS attack based on SOAP

The security standards of web services are presented,such as WS-Security can ensure the information's integrity,confidentiality,authentication,authorization and so on.However,not all kinds of malicious attacks,for example DoS,are solved.Attacks of denial of service(DoS) for web services are discussed.And an application level gateway,called CheckWay,based SOAP,is presented.It protected web services from DoS attack by validating the SOAP message against XML Schema grammars created by WSDL.