Hi Shriram Krisnarmurthi (DR Scheme) presented a nice model to identify problem in complex modern access-control at dagsthul. What is interesting is that they offer a tool (margrave) to see if there is no strange configuration, especially in the sense of evolution of the access control. Apparently now there are languages to express access control: XACML seems the most important. Stef _______________________________________________ SmallWiki, Magritte, Pier and Related Tools ... https://www.iam.unibe.ch/mailman/listinfo/smallwiki