JXTA çatısı için güvenli ağ servisleri yayılması ve kullanılması

Web services introduce a new paradigm for distributed computing, and the technology that it introduces constructs a new type of Web application. Web services can be described as any software that makes its discovery and invocation available over the Internet, and uses a standardized XML messaging system. The term peer-to-peer refers to a class of decentralized systems enabling the access of shared resources available on peers that are acting both as client and as server. In this work, a peer-to-peer approach is used to expoit Web service technologies by providing Web service security for JXTA peer-to-peer networks. JXTA is a network programming environment that has particularly been designed for the peer-to-peer platform. In order to achieve the goal of secure Web services, the specifications 3WSSecurity4, 3XML Key Management Specification4, 3WS-Trust4 and 3WSSecurityPolicy4 are exploited. 3WS-Security4 is primarily a specification for an XML-based security metadata container, and is a building block for the specifications 3WS-Trust4 and 3WS-SecurityPolicy4. 3WS-Trust4 defines the process of how to acquire security tokens. Within the peer-to-peer network that is proposed with this work, a peer is dedicated to act as a 3trusted third party4 and to manage the processes for incorporating the security of public-key infrastructure, which is defined by 3XML Key Management Specification4. In addition, the same peer is dedicated to manage to acquire security tokens, which is defined by 3WS-Trust4. As for 3WS-SecurityPolicy4, Web service invoking peers conform to this specification that specifies how to define security assertions stating Web service provider2s preferences and requirements. This work realizes and achieves the necessity of bringing together the technologies mentioned above in order to propose an architecture of secure SOAP messaging for Web service invocation inM.S. - Master of Scienc