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Data outsourcing in cloud is emerging as a successful paradigm that benefits organizations and enterprises with high-performance, low-cost, scalable data storage and sharing services. However, this paradigm also brings forth new challenges for data confidentiality because the outsourced are not under the physic control of the data owners. The existing schemes to achieve the security and usability...
Web-based portals have been increasingly used to integrate information from a variety of back-end Web services. In these systems, security is a critical feature. This paper presents a SAML/XACML based access control between portal and Web services to extend the authentication and authorization mechanism within a portal to external Web services.
In secure media communication system, access control is a very important and challenging issue. A common practice is to encrypt the media content using a session key, and only legal clients know the session key to decrypt the data. Since the clients can join/leave the group session frequently, the session key needs to be updated and delivered to the legal clients accordingly in order to provide forward/backward...
The Common Instrument Middleware Architecture (CIMA) project, supported by the NSF Middleware Initiative, aims at making scientific instruments and sensors remotely accessible by providing a general solution for services and user interfaces to remotely access data from instruments and to remotely monitor experiments. X-ray crystallography is one of several motivating applications for the development...
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