A lightweight protocol for the generation and distribution of secure e-coupons
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\begin{bibtex} @inproceedings{DBLP:conf/www/BlundoCB02, title={A lightweight protocol for the generation and distribution of secure e-coupons}, pages={542-552}, year={2002}, booktitle={WWW}, ee={http://doi.acm.org/10.1145/511446.511517}, url={http://www.informatik.uni-trier.de/~ley/db/conf/www/www2002.html#BlundoCB02}, author={Carlo Blundo and Stelvio Cimato and Annalisa De Bonis} }\end{bibtex}
