@inproceedings{CELMS07, author = {Liqun Chen and Alberto N. Escalante and Hans L{\"o}hr and Mark Manulis and Ahmad-Reza Sadeghi}, title = {A {P}rivacy-{P}rotecting {M}ulti-{C}oupon {S}cheme with {S}tronger {P}rotection against {S}plitting}, booktitle = {Financial Cryptography and Data Security, 11th International Conference, FC 2007}, publisher = {Springer-Verlag}, series = {Lecture Notes in Computer Science}, volume = {4886}, pages = {29--44}, year = {2008}}