Providing Personalization and Automation to Spatial-Temporal Stamping Services

We describe a policy model and a language designed to provide personalization and automation to spatial-temporal stamping services. These security services have been recently proposed in the context of location based services. Their goal is to issue non-repudiation digital evidences about the spatial-temporal conditions of mobile entities. One of the issues that existing spatial-temporal stamping services have not addressed is how to incorporate personalization and automation in the stamping. We propose an enhanced spatial-temporal stamping service which fulfills these requirements by integrating a policy framework. In this paper we focus on the information model and the policy language. Our language, defined using XML schema, allows a personalized specification of the spatial-temporal conditions that trigger automated spatial-temporal stamp requests