Thanks to the increasing success of virtualization technologies and processing capabilities of computing devices, the deployment of virtual network functions is evolving towards a unified approach aiming at concentrat...
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Thanks to the increasing success of virtualization technologies and processing capabilities of computing devices, the deployment of virtual network functions is evolving towards a unified approach aiming at concentrating a huge amount of such functions within a limited number of commodity servers. To keep pace with this trend, a key issue to address is the definition of a secure and efficient way to move data between the different virtualized environments hosting the functions and a centralized component that builds the function chains within a single server. This paper proposes an efficient algorithm that realizes this vision and that, by exploiting the peculiarities of this application domain, is more efficient than classical solutions. The algorithm that manages the dataexchanges is validated by performing a formal verification of its main safety and security properties, and an extensive functional and performance evaluation is presented. (C) 2017 Elsevier Inc. All rights reserved.
Multi-level data on land and resource plays an increasingly important role in the development of Land and Resource E-government. In view of data security, there must be physical isolation between intranet and extranet...
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ISBN:
(纸本)9781424473021
Multi-level data on land and resource plays an increasingly important role in the development of Land and Resource E-government. In view of data security, there must be physical isolation between intranet and extranet of Land and Resource E-government of governments at all levels, therefore, it reduces officials' efficiency to a certain extent, especially for those on a business trip. Multi-level data exchange mechanism aiming at sharing of data between intranet and extranet is strongly demanded as the rapid development of network service. This paper divides multi-level data on land and resource into two categories: spatial data and government affairs information. We concern with data exchange mechanism mainly in the respect of government affairs information which is considered as an absolute solution to improvement of officials' efficiency. This paper expounds that the design philosophy of data exchange mechanism based on XML technology is representation of data into XML document. The purpose of the research is to establish data exchange mechanism not only sharing of government affairs information between intranet and extranet but also ensuring data security of Land and Resource E-government. After deeply studying dataexchange theories, we propose a development plan based on middleware including three functional modules: data extraction module, middleware indication module indicated by ConfigurationXML document and dataXML document and data storage module. In this paper, data exchange mechanism has been applied in Hubei Province Land and Resource E-government System which is proved in practice as a kind of effective assistance and polish to the system mainly in terms of processing business. In addition, data exchange mechanism used digital certificates technology and the method of tracking security log to assure data security.
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