@techreport{BBK11b, author = "David Basin and Samuel J. Burri and G{\"u}nter Karjoth", institution = "IBM Research – Zurich", month = "February", note = "partner: ETH; projects: NESSoS; CITE (09/04/14): 0", number = "RZ 3799", title = "{O}bstruction-free {A}uthorization {E}nforcement: {A}ligning {S}ecurity and {B}usiness {O}bjectives", year = "2011", }