Enzmann, M.M.EnzmannSchneider, M.M.Schneider2022-03-102022-03-102004https://publica.fraunhofer.de/handle/publica/34688010.1109/EEE.2004.1287337enloyaltyprivacyRSAcryptographyE-Commerce005004A privacy-friendly loyalty system for electronic marketplacesconference paper