@inproceedings{ArEsLoMaSa08, author = {Frederik Armknecht and Alberto N. Escalante and Hans L{\"o}hr and Mark Manulis and Ahmad-Reza Sadeghi}, title = {{Secure Multi-Coupons for Federated Environments: Privacy-Preserving and Customer-Friendly}}, booktitle = {Information Security Practice and Experience, 4th International Conference, ISPEC 2008}, year = {2008}, pages = {29--44}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, volume = {4991}}