Download Distributed Communities on the Web: 4th International by John Plaice, Peter Kropf, Peter Schulthess, Jacob Slonim PDF

By John Plaice, Peter Kropf, Peter Schulthess, Jacob Slonim

This e-book constitutes the completely refereed post-proceedings of the 4th foreign Workshop on dispensed groups on the net, DCW 2002, held in Sydney, Australia in April 2002. The 25 revised complete papers offered including an introductory evaluation and description of the sphere have been rigorously reviewed and chosen from fifty nine submissions. The papers are equipped in topical sections on adaptive networks, collaborative structures, languages for the net, and adaptive disbursed platforms.

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Additional resources for Distributed Communities on the Web: 4th International Workshop, DCW 2002 Sydney, Australia, April 3-5, 2002, Revised Papers

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For the public key encryption, key management and certification authorities are a must. 38 R. Saliba, G. Babin, and P. Kropf As is the case with security services, security mechanisms may also be used at different layers of the OSI reference model. To illustrate this, we give a short list of well-known security mechanisms and the corresponding layer to which they apply. – – – – – Application layer: S/MIME, S-HTTP, Secure TELNET. Presentation layer: Secure RPC, SASL, SSH. Transport layer: SSL, TLS.

In contrast to the prementioned possibilities it only gets notification (and each time) presence information changes. A watcher can take the role of a presentity at the same time and vice versa. In many scenarios this is the normal case. Like for instance in a collaborative browsing application where each participant is present at some web page (or web site) and at the same time interested in who else is present there. 4 Vicinity A vicinity is a set of locations which are adjacent in terms of awareness.

As long as these sites are connected, actions can be transferred reliably and timely and lost actions can be detected and retransferred quickly. This architecture has implemented in the CoDesign prototype system. The CoDesign system is a multi-level collaborative graphics designing system [2,3]. The architecture is as follows: Project – Document – Layer – Object. A project has one or more document(s), a document has one or more layer(s), and a layer has one or more object(s). The object is the minimum operable cell.

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