PERIKLIS is a Greek National project for the development of an innovative e-Government platform for public services, using mobile and social network technologies. PERIKLIS consists of a content management system for publishing, editing and modifying content in both desktop and mobile and a middleware framework containing core functionalities and intelligence. The main services of the platform i...

In recent years, there has been a great deal of debate about whether a large-scale \publickey infrastructure" is needed for electronic commerce and, if so, whether the technical di culty of building and deploying such an infrastructure will impede the growth of electronic commerce. We argue here that much of the controversy is attributable to the fact that the term \public-key infrastructure" h...

Deciding who to trust in the internet of services paradigm is an important and open question. How to do it in an optimal way is not always easy to determine. Trust is usually referred to a particular context, and sometimes a single user interacts in more than one given context. We are interested in investigating how a Federated Reputation System can help exporting trust perceptions from one con...

Telecommunication incumbents regard IPTV as a key service differentiator to reduce customer churn and generate new revenue streams. However, as more operators deploy this service, the factors for differentiation are dissolving rapidly. In this paper we present how IPTV can be enriched by integrating telecommunications services. We also show how new collaborative business models can be created b...

Electronic identity (eID) cards promise to supply a universal, nation-wide mechanism for user authentication. Most European countries have started to deploy eID for government and private sector applications. Are government-issued electronic ID cards the proper way to authenticate users of online services? We use the German eID project as a showcase to discuss eID from an application perspectiv...

Whereas in real everyday life individuals have an intuitive approach at deciding which information to disseminate to others, in the digital world it becomes difficult to keep control over the information that is distributed to different online services. In this paper we present the design of a user interface for a system that can help users decide which pieces of information to distribute to wh...

Besides their use in identity verification at police and border controls, national ID cards are frequently used for commercial applications, too. One objective of the introduction of the new national ID card on 1 November 2010 is to extend the conventional use of ID documents to the digital world. In order to meet this objective, the new ID card offers two electronic functionalities for e-busin...

The convergence of Internet and mobile computing enables personalised access to online services anywhere and anytime. This potent access capability creates opportunities for new business models which stimulates vigorous investment and rapid innovation. Unfortunately, this innovation also produces new vulnerabilities and threats, and the new business models also create incentives for attacks, be...

This paper deals with redesigning the existing e-commerce architecture that has provided a platform for the large companies to sell their products so that it can provide a place on internet for Small Medium and Micro Enterprises (SMME) companies to sell their products. E-commerce is to buy and sell the goods or services between vendors and purchasers electronically over the internet. Informatio...