Cong Sun

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We propose an approach on model checking information flow for imperative language with procedures. We characterize our model with pushdown system, which has a stack of unbounded length that naturally models the execution of procedural programs. Because the type-based static analysis is sometimes too conservative and rejects safe program as ill-typed, we(More)
—Language-based information flow security aims to decide whether an action-observable program can unintentionally leak confidential information if it has the authority to access confidential data. Recent concerns about declassification polices have provided many choices for practical intended information release, but more precise enforcement mechanism for(More)
—The ubiquity of the various cheap embedded sensors on mobile devices, for example cameras, microphones, accelerome-ters, and so on, is enabling the emergence of participatory sensing applications. While participatory sensing can benefit the individuals and communities greatly, the collection and analysis of the participators' location and trajectory data(More)
Trust plays a pivotal role in decision support for service-oriented computing networks. Recent advances in service evaluation and selection have provided some preliminary findings on the construction of composite services. However, the great expense of interdomain validations, the dynamic execution time and the subjective requirement for global execution(More)
Interactive/Reactive computational model is known to be proper abstraction of many pervasively used systems, such as client-side web-based applications. The critical task of information flow control mechanisms aims to determine whether the interactive program can guarantee the confidentiality of secret data. We propose an efficient and flow-sensitive static(More)
BACKGROUND The applications of ligand-polyethylene glycol (PEG)-modified nanocarriers have now emerged, as well as recognized strategies to provide the vectors with active targeting properties. In this research, premodification and postmodification were compared using the same ligand, ie, a novel conjugated mannan-containing PEG and(More)