In this work we consider the Di e-Hellman Public-key model in which an additional short random string is shared by all users. This, which we call Public-Key Public-Randomness (PKPR) model, is very powerful as we show that it supports simple non-interactive implementations of important cryptographic primitives. We give a non-interactive implementation of Oblivious Transfer in the PKPR model. Our...

Public organisations often face knowledge problems due to the continual and pervasive movement of staff between units and department. The Pellucid project is developing a knowledge management system to assist in such situations. This paper describes the knowledge engineering and the knowledge level modelling undertaken in Pellucid. We use CommonKADS task templates as a mechanism to identify and...

What is the status and role in public action of the knowledge possessed by ‘simple’ citizens, users and professionals? That is the question broached in both this article and the entire special issue for which it serves as the introduction. To this end, we explore the abundant scientific literature pertaining to the topic and try to situate our own position within the broader setting. After disc...