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Cognitive radio technology is used to alleviate the contradiction between the scarcity problem and low utilization rate of spectrum resources. However, the existence of unbelievable data leads to an inaccurate judge for some available resources, which causes the failed network behaviors and interferes the authorized networks. The traditional security techniques can't defense this threat efficiently...
Module lattices have many advantages over traditional number theory to construct security schemes. Especially, module lattice-based security schemes are potentially able to resist to quantum attacks which can break traditional number theory based ones. In this vein, this paper designed an extremely fast identity-based encryption (for short IBE) scheme from module lattices. Although the security proof...
In pervasive environments, the Pub/Sub paradigm is regarded as an important means of information sharing and event dissemination. In this paper, we first analyze different context in Pub/Sub systems that has remarkable impacts upon user’s satisfaction to event dissemination and then give corresponding strategies by exploiting time context and event-preference context so as to provide personalized...
In a Pub/Sub system, the procedure of distributed event detection can be divided into two interacting phases: the subscription matching and the subscription/event routing. Also, the performance of the system is greatly influenced by these two parts. Adopting a reuse strategy in matching and routing can reduce matching workload and network traffic. However, few of the existing researches provide a...
Pub/Sub systems can facilitate monitoring and managing objects for RFID applications. To fully support RFID applications, Pub/Sub systems should provide the means of subscribing RFID tags and the corresponding efficient matching algorithm. This paper provides the management mechanism and matching algorithm for primitive subscriptions whose specification permits to subscribe RFID codes. Our approach...
Bringing in complex events in distributed pub/sub systems enables users to observe complicated event correlations over time and space. However, the routing of complex events in pub/sub systems is still largely unexplored, especially lacking quantitative analysis and deep assessment. This paper focuses on the deployment of composite subscriptions, formulating the traffic cost by using the traffic analysis...
RFID technology facilitates monitoring and managing products. In most RFID applications, users pay much attention to temporal and logical event patterns, which is further strengthened by highly temporal RFID data. If RFID events or other kinds of events are disseminated to users through Pub/Sub service, visibility of product states will be greatly increased and fast processing these events will become...
Publish/subscribe service can deliver customized events and increase product visibility for users in RFID applications such as logistics supporting systems. This paper herein presents a composite subscription specification for RFID- related application scenarios, permitting to subscribe predicates for RFID-codes as well as temporal events. Moreover, an effective matching algorithm for RFID-code subscriptions...
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