Jungha Woo Abhilasha Bhargav-Spantzel Anna Cinzia Squicciarini Elisa Bertino Verification of Receipts from M-commerce Transactions on NFC Cellular Phones. 36-43 2008 CEC/EEE http://dx.doi.org/10.1109/CECandEEE.2008.130 conf/wecwis/2008 db/conf/wecwis/cec2008.html#WooBSB08