Peter Herrmann Heiko Krumm Trust-Adapted Enforcement of Security Policies in Distributed Component-Structured Applications. 2-8 http://csdl.computer.org/comp/proceedings/iscc/2001/1177/00/11770002abs.htm 2001 conf/iscc/2001 ISCC db/conf/iscc/iscc2001.html#HerrmannK01