Frank Fransen Sven Lachmund Eddy Olk Laurent Bussard An Infrastructure for Gaining Trust in Context Information. 1-10 2006 SecureComm http://doi.ieeecomputersociety.org/10.1109/SECCOMW.2006.359543 conf/securecomm/2006 db/conf/securecomm/securecomm2006.html#FransenLOB06