Günther Pernul Marco Casassa Mont Eduardo B. Fernández Sokratis K. Katsikas Alfred Kobsa Rolf Oppliger Panel Discussion: Managing Digital Identities - Challenges and Opportunities. 2 2007 conf/trustbus/2007 TrustBus http://dx.doi.org/10.1007/978-3-540-74409-2_2 db/conf/trustbus/trustbus2007.html#PernulMFKKO07