373Temporal Geosocial Mobile Semantic Web
secure, and efcient. Such an audit system could be used as a basis for creating information-sharing
incentives. First, using such a distributed audit system, it may be possible to nd out whether an
agency is truthful or not by conducting an audit using the audit logs and the documents stored by
the agency. Also, an agency may publish accurate statistics about each user’s history using the audit
system. For example, agency B could publish the number of queries it sent to agency A that resulted
in positive responses, the quantity of documents that are transmitted, and how useful those docu-
ments were according to scoring metrics. The audit logs and aggregate statistics could be used to set
proper i ...