Technical Chamber of Greece

One of the most important issues in traditional and modern networks architecture is security. Data integrity and authenticity are the most critical points that a network security model should protect and ensure. Authentication, Authorization and Accounting model (AAA Protocol) is one of the most portable security concepts. Authentication acts providing proof of authenticity for stored data and verifying proof of authenticity for received. Authorization acts providing privileges to those clients that present specific credentials. Accounting acts collecting accounting metrics for two reasons; to forward them to the billing server for billing results, and to keep them saved locally for the procedure of trend analysis. In this paper, the generic AAA architecture is introduced, personalized and practically designed for usage in modern networks. The most efficient way, using supported protocols and cryptographic algorithms, for administrating AAA in practice, is proposed for mobile networks or administrative domains. In this work, a Web based application scenario using the AAA protocol is proposed, with the server-side developed in PHP, SQL and Java, implementation platform.

A great amount of scientific work carried out at universities, is being disseminated through non-commercially published types of literature, the so-called Grey literature, like dissertations, internal technical reports, teaching material, deliverables of research projects etc. The systematic storage, processing and dissemination of the intellectual work produced in the Greek higher education institutions is an objective which can be achieved with the use of new information and communication technologies.A digital library model for the Grey literature of the Greek higher education is proposed, based on the DIENST architecture, leading to an integrated, distributed digital library system. The system will allow the easy and fast entry, access and location of primary information contained and produced in any participating institution. The technical and organisational issues related to the design and implementation of such a system are presented.