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In order to offer security for multicast applications, the group key has to be changed whenever a user joins or leaves the group. At present, there are two re-keying strategies: individual re-keying and batch re-keying. Individual re-keying method has the problems of inefficient and out-of-sync. Batch re-keying method alleviates these problems, but this method ignores the change probabilities of members...
RFID is a non-contact, multi-objective automatic identification technology, widely used in traceability from farm to supermarket. But standardization and privacy are the main problems to solve urgently for recent RFID traceability systems. In this paper, a standard format for the content of the RFID tags compliant with the EPCglobal standard is introduced, and the conversion between EAN-128 bar code...
Remote smart card authentication and authenticated key agreement protocol for multi-servers are proposed in the paper. In the scheme the system does not need to maintain any password table, and the user who has registered in the servers does not need to remember different login passwords for various servers. Also it allows the user to choose login passwords freely. Furthermore, the proposed protocol...
A novel algorithm of multiple watermarks based on contourlet transform for e-commerce transaction is proposed in this paper, in which both the watermark of copyright owner and that of customer is embedded into the original image. Multiple watermarks are transmitted to the center of CA (certificate authority) using the method of the confidential digital signatures, thus the safety of the multiple watermarks...
Aspectual component composition platform needs a new kind of language to support the description and verification of the software architecture. Based on the extension of Wright, this paper proposes an aspectual components composition architecture description language-AWright. Since Wright fails to describe system??s non-functional requirements and lacks corresponding elements for describing the coupling...
The involvement of only the necessary users and service providers for service discovery in pervasive computing environments is challenging. Without prudence, users' and service providers' requests or service information, their identities, and their presence information may be sacrificed. We identify that the problem may be as difficult as a chicken-and-egg problem, in which both users and service...
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