Some security considerations on crowd-sourcing an ontology

The 4w project has demonstrated the feasibility of a prospective memory support systems based on a mobile client and an ontology based server side reasoning engine. However, the experiments also showed that the level of efficiency of the system was largely dependent on the precision and richness of the ontology used to autonomously identify the places where users may efficiently perform their tasks. Thus, in past works we have proposed a social, crowdsourcing approach to the task of enriching the ontology. In this paper we analyze the security aspects of the crowdsourcing approach, we investigate some possible attacks to a crowd-sourced ontology and we devise some measures to protect the system from this kind of attacks.