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paypal website builder, and shopping cart creator information: If a system cannot provide (at least) the same degree of auditability, it may not meet the demands of users to be protected from fraud[17], or the legal requirements of tax collectors [16,17]. ) In practice, the customer might use a one-way hash function provided by the associated notary or the associated verifier, who would be responsible for recording the history of which hash functions were used and when. In e-commerce, one might reveal allinformation about the transaction to a third party. Customer's perspectivefrom a customer's perspective, the purpose of an electronic-commerce system is to enable that customer to locate and purchase a desired good or service over the internet when the customer is interested in making the purchase.

It would be most efficient for a single agency totake responsibility for some of these tasks - probably a federal agency. For each verifier account, a relationship is established with one or more notaries. If the keyvalues are generated elsewhere and loaded onto such cards, the very fact that thesevalues exist in more than one place adds opportunities for illicit duplication and signatureforgery.