Uche M. Mbanaso G. S. Cooper David W. Chadwick Anne Anderson Obligations for Privacy and Confidentiality in Distributed Transactions. 69-81 2007 conf/euc/2007w EUC Workshops http://dx.doi.org/10.1007/978-3-540-77090-9_7 db/conf/euc/eucw2007.html#MbanasoCCA07