The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The increasing user mobility and more and more powerful mobile devices changed the way services are used today, e.g., by taking the user's location into account. Indeed, service interaction models are also influenced by this development making the ad hoc composition of complementary functionalities possible. Here, particular challenges remain in the field of composing services that are hosted on different...
ULTRA GRIDSEC" is a high performance symmetric key cryptography schema used to increase the performance of symmetric key encryption algorithms like DES and TDES by decreasing their execution time and increasing their security by using compression and multithreading techniques and other enhancement points. In this paper we enhancing the performance of a "ULTRA GRIDSEC" by using a pure...
With the development of the peer-to-peer technology, a lot of lookup protocols have come out. Although we can benefit from different protocols separately, our research shows that given a proper model, most of the seemingly different protocols can be classified to a same framework. Since the essence of P2P lookup protocol is to find a specific node from network, some classic lookup arithmetic models...
To effectively manage the task allocation, especially when handling with numerous different peers' qualities, is one of the greatest challenges to be faced in order to guarantee the success of P2P-based e-services composition. In this context, various QoS descriptive frameworks and Web services technologies (such as WSDL and BPEL) are being considered as the most affordable solutions to promote the...
Traditional ontology mapping techniques are not strictly applicable in a dynamic and distributed environment (e.g. P2P and pervasive computing) in which on-the-fly alignments are sought after. We propose a theoretical framework that collaborates the logic formalisms with collaboratively created web repositories. A graph clustering algorithm is to discover, from concept definitions, the "feature"...
Security and privacy is a big problem that feazing computer researchers all along. In the pervasive computing, because the traditional methods of user authorization and access control are no longer adapted, the security and privacy becomes much more difficult to ensure. This paper proposes a dynamic trust model based on P2P. In this paper we call the trust model PDTM. The model adopts the technique...
Peer-to-peer constructed on the basis of the distributed hash table don't consider the underlying physical network topology when it build logical overlay, which lead to topology mismatch. In the mobile environment, nodes move randomly, join and leave frequently, which have exacerbated the underlying physical network topology dynamic changes, and further exacerbated mismatch between the logical overlay...
Low efficiency occurs just because physical topology isn't considered when Mobile Peer-to-Peer (MP2P) constructs overlay network; this paper will propose a novel vector location-based algorithm based on Distributed Hash Tables (DHT) algorithm. Using pole coordinates to divide physical network into different zones, constructing new routing protocol based on the location vector information; thus, nodes...
In this paper, we propose a hierarchical and heterogeneous P2P-SIP architecture, which is independent of the underlying DHT overlay and makes the combination of P2P and SIP practical. Peers who work in heterogeneous overlays, i.e. Chord, Kademlia and Pastry, can intercommunicate with other peers who are in different overlay via a decentralized manner provided by the hierarchical P2P-SIP architecture...
Smart-flow is an innovative process application mode which involves processes in our daily lives based on the Web services spreading over Internet and the pervasive interactions between users and workflow management systems. The dynamic features of pervasive environments and independent service providers do not allow any centralized control or repository. By combining rationales and techniques in...
HP2P is a two-layer hybrid P2P network that combines the merits of DHT and flooding methods. It is proposed to improve poor scalability and low efficiency in the flooding-based unstructured P2P networks as well as low stability in the DHT-based structured P2P networks. HP2P is a new P2P framework that is believed to be useful in the real network. By the analysis and simulation of HP2P, we conclude...
The trend of future communication network is the All-IP network, which brings huge opportunities for mobile P2P network. The distributed computing mode of P2P technology replaces the centralized control mode in traditional telecommunication system, so it makes traditional communication network billing control come across a lot of difficulties. We propose a flow oriented billing model for mobile P2P...
Super-peer P2P systems strike a balance between searching efficiency in centralized P2P systems and the autonomy, load balancing and robustness provided by pure P2P systems. Super-peer is a node in the super-peer P2P system that maintains the central index for the information shared by a set of peers within the same cluster. The central index handles the searching request on behalf of the connecting...
Peer to peer (P2P) file sharing on mobile device has attracted great attention in both academia and industry. Current P2P file sharing applications for mobile users is expensive and still remains a substantial problem for the transmission of the large shared files. In this paper, we discuss the current file sharing possibilities on a 3G network environment. A mobile P2P file sharing solution to facilitate...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.