@inproceedings{PiotrowskiLangendoerferKulikowski, author = {Piotrowski, Krzysztof and Langend{\"o}rfer, Peter and Kulikowski, D.}, title = {Moneta: An Anonymity Providing Lightweight Payment System for Mobile Devices}, language = {en} } @article{KulikowskiLangendoerferPiotrowski, author = {Kulikowski, D. and Langend{\"o}rfer, Peter and Piotrowski, Krzysztof}, title = {A Location Aware Revocation Approach}, language = {en} }