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The main driving force for the rapid acceptance rate of small sized mobile devices to do e-commerce is its increased convenience and efficiency in performing simple transactions compared with the stationary machines. Two of the weaknesses of this type of ecommerce are: (1) due to its small size, a mobile device can easily get lost and get stolen; (2) it is neither very convenient nor cheap for a mobile user to perform transactions that require more than just a few messages, scanning ofdoi:10.1109/hicss.2001.927211 dblp:conf/hicss/TangV01 fatcat:kisrz7pn6jgt3fc4omauuuk2xu